./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d759988a90bf6714578fc618630dc9d346515dfe23789cba296c3d8ccdbe3f23 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:44,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:44,920 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:46:44,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:44,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:44,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:44,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:44,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:44,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:44,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:44,984 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:44,985 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:44,986 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:44,988 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:44,988 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:44,989 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:44,989 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:44,990 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:44,990 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:44,991 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:44,991 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:44,992 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:44,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:46:44,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:46:44,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:44,995 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:44,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:44,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:44,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:44,997 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:46:44,998 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:46:44,998 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:46:44,999 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:44,999 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:46:44,999 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:46:45,000 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:45,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:45,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:45,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:45,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:45,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:45,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:45,003 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:45,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:45,004 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:45,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:45,004 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_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d759988a90bf6714578fc618630dc9d346515dfe23789cba296c3d8ccdbe3f23 [2023-11-12 00:46:45,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:45,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:45,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:45,376 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:45,377 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:45,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2023-11-12 00:46:48,606 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:48,879 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:48,879 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/sv-benchmarks/c/array-memsafety/openbsd_cbzero-alloca-2.i [2023-11-12 00:46:48,906 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/data/649a4f8b0/c6c093ff9f8f4d438500fd8c5f05a669/FLAGdc5527233 [2023-11-12 00:46:48,926 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/data/649a4f8b0/c6c093ff9f8f4d438500fd8c5f05a669 [2023-11-12 00:46:48,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:48,931 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:48,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:48,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:48,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:48,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:48" (1/1) ... [2023-11-12 00:46:48,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4985b401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:48, skipping insertion in model container [2023-11-12 00:46:48,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:48" (1/1) ... [2023-11-12 00:46:48,984 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:49,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:49,357 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:49,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:49,437 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:49,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49 WrapperNode [2023-11-12 00:46:49,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:49,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:49,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:49,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:49,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,501 INFO L138 Inliner]: procedures = 116, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-11-12 00:46:49,501 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:49,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:49,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:49,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:49,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:49,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:49,529 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:49,529 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:49,530 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (1/1) ... [2023-11-12 00:46:49,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:49,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:49,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:49,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:49,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:49,720 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:49,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:49,846 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:49,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:49,914 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:46:49,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:49 BoogieIcfgContainer [2023-11-12 00:46:49,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:49,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:49,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:49,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:49,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:48" (1/3) ... [2023-11-12 00:46:49,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfd5a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:49, skipping insertion in model container [2023-11-12 00:46:49,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:49" (2/3) ... [2023-11-12 00:46:49,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfd5a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:49, skipping insertion in model container [2023-11-12 00:46:49,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:49" (3/3) ... [2023-11-12 00:46:49,936 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca-2.i [2023-11-12 00:46:49,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:49,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-12 00:46:49,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:50,001 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;@63f9f606, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:50,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 00:46:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:46:50,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:50,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:46:50,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:50,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash 76485, now seen corresponding path program 1 times [2023-11-12 00:46:50,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:50,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001290930] [2023-11-12 00:46:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:50,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:50,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:50,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001290930] [2023-11-12 00:46:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001290930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:50,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:46:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371931967] [2023-11-12 00:46:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:50,340 INFO L87 Difference]: Start difference. First operand has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 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) [2023-11-12 00:46:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:50,399 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2023-11-12 00:46:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:50,402 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 [2023-11-12 00:46:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:50,409 INFO L225 Difference]: With dead ends: 12 [2023-11-12 00:46:50,410 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:46:50,412 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 [2023-11-12 00:46:50,416 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:50,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:46:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-12 00:46:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-12 00:46:50,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 3 [2023-11-12 00:46:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-12 00:46:50,450 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) [2023-11-12 00:46:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-12 00:46:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:46:50,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:50,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:46:50,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:50,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:50,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash 73547189, now seen corresponding path program 1 times [2023-11-12 00:46:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301787537] [2023-11-12 00:46:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:50,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301787537] [2023-11-12 00:46:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301787537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200660515] [2023-11-12 00:46:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:50,736 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:50,797 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2023-11-12 00:46:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:46:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:50,799 INFO L225 Difference]: With dead ends: 9 [2023-11-12 00:46:50,799 INFO L226 Difference]: Without dead ends: 9 [2023-11-12 00:46:50,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:50,808 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:50,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-12 00:46:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 00:46:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-11-12 00:46:50,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2023-11-12 00:46:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:50,815 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-11-12 00:46:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-11-12 00:46:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:46:50,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:50,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:46:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:46:50,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:50,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash 73547190, now seen corresponding path program 1 times [2023-11-12 00:46:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:50,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164407907] [2023-11-12 00:46:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:51,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:51,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164407907] [2023-11-12 00:46:51,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164407907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:51,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316742180] [2023-11-12 00:46:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:51,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:51,318 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:51,372 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-11-12 00:46:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:51,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:46:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:51,373 INFO L225 Difference]: With dead ends: 13 [2023-11-12 00:46:51,374 INFO L226 Difference]: Without dead ends: 13 [2023-11-12 00:46:51,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:46:51,376 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:51,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-12 00:46:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-12 00:46:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-12 00:46:51,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2023-11-12 00:46:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:51,381 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-12 00:46:51,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-12 00:46:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:46:51,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:51,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:46:51,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:46:51,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:51,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2015006103, now seen corresponding path program 1 times [2023-11-12 00:46:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:51,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789065301] [2023-11-12 00:46:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:51,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:51,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789065301] [2023-11-12 00:46:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789065301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:51,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:51,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160674594] [2023-11-12 00:46:51,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:51,616 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.2) 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) [2023-11-12 00:46:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:51,663 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2023-11-12 00:46:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:46:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:51,665 INFO L225 Difference]: With dead ends: 12 [2023-11-12 00:46:51,665 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 00:46:51,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:46:51,667 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:51,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 00:46:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 00:46:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-12 00:46:51,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2023-11-12 00:46:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:51,671 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-12 00:46:51,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) 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) [2023-11-12 00:46:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-12 00:46:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:46:51,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:51,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-12 00:46:51,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:46:51,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:51,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash 611367033, now seen corresponding path program 1 times [2023-11-12 00:46:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:51,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947001001] [2023-11-12 00:46:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:52,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947001001] [2023-11-12 00:46:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947001001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51378398] [2023-11-12 00:46:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:52,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:52,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:52,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:52,380 WARN L260 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-12 00:46:52,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:52,567 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 [2023-11-12 00:46:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:53,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51378398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:53,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995592797] [2023-11-12 00:46:53,507 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-12 00:46:53,508 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:53,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:53,518 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:53,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:55,806 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:57,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '195#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cbzero_#in~b#1.base|) (<= 2 |ULTIMATE.start_cbzero_~b#1.base|) (<= 2 |ULTIMATE.start_cbzero_~p~0#1.base|) (= |ULTIMATE.start_cbzero_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 1 |ULTIMATE.start_cbzero_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |ULTIMATE.start_cbzero_~b#1.offset| 0) (<= 0 |ULTIMATE.start_cbzero_#t~post3#1.offset|) (<= (select |#length| |ULTIMATE.start_cbzero_#t~post3#1.base|) |ULTIMATE.start_cbzero_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cbzero_#t~post3#1.base|))' at error location [2023-11-12 00:46:57,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:57,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:46:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-12 00:46:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967684009] [2023-11-12 00:46:57,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:46:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:46:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:46:57,141 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) 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) [2023-11-12 00:46:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:57,848 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-12 00:46:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:46:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) 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) Word has length 8 [2023-11-12 00:46:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:57,849 INFO L225 Difference]: With dead ends: 15 [2023-11-12 00:46:57,849 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:46:57,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 00:46:57,851 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:57,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:46:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:46:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 00:46:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) 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) [2023-11-12 00:46:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-12 00:46:57,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2023-11-12 00:46:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:57,858 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-12 00:46:57,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) 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) [2023-11-12 00:46:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-12 00:46:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:46:57,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:57,860 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:57,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:58,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:58,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:58,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1772507142, now seen corresponding path program 1 times [2023-11-12 00:46:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:58,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018034077] [2023-11-12 00:46:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:58,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:46:58,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018034077] [2023-11-12 00:46:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018034077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:58,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:58,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:58,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497988115] [2023-11-12 00:46:58,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:58,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:46:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:46:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:58,191 INFO L87 Difference]: Start difference. First operand 15 states and 16 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) [2023-11-12 00:46:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:58,202 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2023-11-12 00:46:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:46:58,203 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 9 [2023-11-12 00:46:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:58,206 INFO L225 Difference]: With dead ends: 14 [2023-11-12 00:46:58,206 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 00:46:58,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:46:58,211 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:58,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 00:46:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 00:46:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-12 00:46:58,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2023-11-12 00:46:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:58,220 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-12 00:46:58,220 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) [2023-11-12 00:46:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-12 00:46:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:46:58,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:58,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1] [2023-11-12 00:46:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:46:58,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-12 00:46:58,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1720671530, now seen corresponding path program 2 times [2023-11-12 00:46:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:58,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663539704] [2023-11-12 00:46:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:58,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:59,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663539704] [2023-11-12 00:46:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663539704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550732256] [2023-11-12 00:46:59,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:59,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:59,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:59,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:46:59,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:46:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:59,198 WARN L260 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-12 00:46:59,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:59,291 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 [2023-11-12 00:46:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:59,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:00,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550732256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:00,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136314437] [2023-11-12 00:47:00,492 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-12 00:47:00,492 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:00,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:00,493 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:00,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:01,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:03,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '364#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cbzero_#in~b#1.base|) (<= 2 |ULTIMATE.start_cbzero_~b#1.base|) (<= 2 |ULTIMATE.start_cbzero_~p~0#1.base|) (= |ULTIMATE.start_cbzero_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 1 |ULTIMATE.start_cbzero_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |ULTIMATE.start_cbzero_~b#1.offset| 0) (<= 0 |ULTIMATE.start_cbzero_#t~post3#1.offset|) (<= (select |#length| |ULTIMATE.start_cbzero_#t~post3#1.base|) |ULTIMATE.start_cbzero_#t~post3#1.offset|) (<= 2 |ULTIMATE.start_cbzero_#t~post3#1.base|))' at error location [2023-11-12 00:47:03,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:03,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:03,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-11-12 00:47:03,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288724992] [2023-11-12 00:47:03,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:03,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 00:47:03,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 00:47:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 00:47:03,369 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:05,073 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-12 00:47:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:47:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:47:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:05,074 INFO L225 Difference]: With dead ends: 14 [2023-11-12 00:47:05,074 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:47:05,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=243, Invalid=1916, Unknown=3, NotChecked=0, Total=2162 [2023-11-12 00:47:05,076 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:05,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:47:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:47:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:47:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:47:05,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2023-11-12 00:47:05,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:05,078 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:47:05,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:47:05,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:47:05,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 3 remaining) [2023-11-12 00:47:05,082 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-11-12 00:47:05,083 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 3 remaining) [2023-11-12 00:47:05,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:47:05,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:05,291 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-12 00:47:05,293 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:47:05,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:47:05 BoogieIcfgContainer [2023-11-12 00:47:05,297 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:47:05,297 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:47:05,298 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:47:05,298 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:47:05,298 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:49" (3/4) ... [2023-11-12 00:47:05,300 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:47:05,310 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-12 00:47:05,310 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-12 00:47:05,311 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-12 00:47:05,311 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:47:05,398 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:47:05,398 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:47:05,398 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:47:05,400 INFO L158 Benchmark]: Toolchain (without parser) took 16469.23ms. Allocated memory was 130.0MB in the beginning and 306.2MB in the end (delta: 176.2MB). Free memory was 83.5MB in the beginning and 100.7MB in the end (delta: -17.2MB). Peak memory consumption was 160.9MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,401 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:47:05,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 506.23ms. Allocated memory is still 130.0MB. Free memory was 83.2MB in the beginning and 67.6MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,401 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.77ms. Allocated memory is still 130.0MB. Free memory was 102.4MB in the beginning and 100.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:47:05,402 INFO L158 Benchmark]: Boogie Preprocessor took 25.71ms. Allocated memory is still 130.0MB. Free memory was 100.8MB in the beginning and 99.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,404 INFO L158 Benchmark]: RCFGBuilder took 394.58ms. Allocated memory is still 130.0MB. Free memory was 99.6MB in the beginning and 87.7MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,405 INFO L158 Benchmark]: TraceAbstraction took 15367.30ms. Allocated memory was 130.0MB in the beginning and 306.2MB in the end (delta: 176.2MB). Free memory was 86.5MB in the beginning and 104.5MB in the end (delta: -18.0MB). Peak memory consumption was 158.4MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,405 INFO L158 Benchmark]: Witness Printer took 101.95ms. Allocated memory is still 306.2MB. Free memory was 104.5MB in the beginning and 100.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 00:47:05,409 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 50.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 506.23ms. Allocated memory is still 130.0MB. Free memory was 83.2MB in the beginning and 67.6MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.77ms. Allocated memory is still 130.0MB. Free memory was 102.4MB in the beginning and 100.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.71ms. Allocated memory is still 130.0MB. Free memory was 100.8MB in the beginning and 99.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.58ms. Allocated memory is still 130.0MB. Free memory was 99.6MB in the beginning and 87.7MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 15367.30ms. Allocated memory was 130.0MB in the beginning and 306.2MB in the end (delta: 176.2MB). Free memory was 86.5MB in the beginning and 104.5MB in the end (delta: -18.0MB). Peak memory consumption was 158.4MB. Max. memory is 16.1GB. * Witness Printer took 101.95ms. Allocated memory is still 306.2MB. Free memory was 104.5MB in the beginning and 100.7MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 15.3s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89 mSDsluCounter, 60 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 32 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 361 IncrementalHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 28 mSDtfsCounter, 361 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 1284 SizeOfPredicates, 27 NumberOfNonLiveVariables, 181 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 2/38 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 00:47:05,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9751842-6588-4490-ac37-87f30f5ab9de/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE