./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E --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 ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:13:51,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:13:51,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 05:13:51,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:13:51,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:13:51,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:13:51,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:13:51,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:13:51,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:13:51,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:13:51,502 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:13:51,502 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:13:51,502 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:13:51,502 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:13:51,503 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:13:51,503 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:13:51,504 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 05:13:51,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 05:13:51,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 05:13:51,505 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 05:13:51,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:13:51,506 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 05:13:51,507 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:13:51,507 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 05:13:51,507 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:13:51,508 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:13:51,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:13:51,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:13:51,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:13:51,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:13:51,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:13:51,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:13:51,509 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:13:51,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:13:51,510 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:13:51,510 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:13:51,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:13:51,510 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E 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 -> ac04f74b68086890b55eca7e645e90e8df8a67932fce57d15e9ba2378d355360 [2024-11-14 05:13:51,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:13:51,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:13:51,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:13:51,924 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:13:51,924 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:13:51,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/memsafety-ext3/realloc1.c Unable to find full path for "g++" [2024-11-14 05:13:54,305 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:13:54,587 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:13:54,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/sv-benchmarks/c/memsafety-ext3/realloc1.c [2024-11-14 05:13:54,595 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/data/9e9f608b6/a59ea4d7dc4e4a30bf804454f5357cd4/FLAG42b04aef1 [2024-11-14 05:13:54,613 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/data/9e9f608b6/a59ea4d7dc4e4a30bf804454f5357cd4 [2024-11-14 05:13:54,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:13:54,617 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:13:54,619 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:13:54,619 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:13:54,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:13:54,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec18e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54, skipping insertion in model container [2024-11-14 05:13:54,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,645 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:13:54,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:13:54,885 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:13:54,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:13:54,924 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:13:54,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54 WrapperNode [2024-11-14 05:13:54,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:13:54,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:13:54,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:13:54,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:13:54,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,946 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,967 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2024-11-14 05:13:54,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:13:54,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:13:54,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:13:54,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:13:54,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:54,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:55,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:55,002 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:55,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:55,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:13:55,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:13:55,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:13:55,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:13:55,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (1/1) ... [2024-11-14 05:13:55,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:13:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:55,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:13:55,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:13:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 05:13:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 05:13:55,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:13:55,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:13:55,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 05:13:55,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 05:13:55,214 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:13:55,216 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:13:55,417 INFO L? ?]: Removed 30 outVars from TransFormulas that were not future-live. [2024-11-14 05:13:55,417 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:13:55,519 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:13:55,519 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 05:13:55,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:13:55 BoogieIcfgContainer [2024-11-14 05:13:55,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:13:55,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:13:55,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:13:55,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:13:55,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:13:54" (1/3) ... [2024-11-14 05:13:55,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44828bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:13:55, skipping insertion in model container [2024-11-14 05:13:55,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:54" (2/3) ... [2024-11-14 05:13:55,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44828bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:13:55, skipping insertion in model container [2024-11-14 05:13:55,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:13:55" (3/3) ... [2024-11-14 05:13:55,534 INFO L112 eAbstractionObserver]: Analyzing ICFG realloc1.c [2024-11-14 05:13:55,554 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:13:55,558 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG realloc1.c that has 1 procedures, 17 locations, 1 initial locations, 1 loop locations, and 8 error locations. [2024-11-14 05:13:55,610 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:13:55,631 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@33657934, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:13:55,632 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-14 05:13:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 8 states have (on average 2.125) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:13:55,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:55,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:13:55,653 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:55,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:55,661 INFO L85 PathProgramCache]: Analyzing trace with hash 76527, now seen corresponding path program 1 times [2024-11-14 05:13:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:55,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386862921] [2024-11-14 05:13:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:55,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386862921] [2024-11-14 05:13:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386862921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:13:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498327141] [2024-11-14 05:13:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:55,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:55,946 INFO L87 Difference]: Start difference. First operand has 17 states, 8 states have (on average 2.125) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 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, 3 states have (on average 1.0) 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) [2024-11-14 05:13:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:56,025 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2024-11-14 05:13:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:56,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 [2024-11-14 05:13:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:56,036 INFO L225 Difference]: With dead ends: 20 [2024-11-14 05:13:56,037 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 05:13:56,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:56,045 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:56,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:13:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 05:13:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2024-11-14 05:13:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-11-14 05:13:56,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2024-11-14 05:13:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:56,098 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-11-14 05:13:56,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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) [2024-11-14 05:13:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-11-14 05:13:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:13:56,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:56,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:13:56,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:13:56,100 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:56,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2024-11-14 05:13:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:56,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392390214] [2024-11-14 05:13:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:56,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392390214] [2024-11-14 05:13:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392390214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:56,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:56,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:13:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711655561] [2024-11-14 05:13:56,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:56,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:56,215 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:56,277 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-11-14 05:13:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:56,277 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 [2024-11-14 05:13:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:56,278 INFO L225 Difference]: With dead ends: 15 [2024-11-14 05:13:56,278 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 05:13:56,278 INFO L431 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 [2024-11-14 05:13:56,280 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:56,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:13:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 05:13:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 05:13:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-14 05:13:56,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2024-11-14 05:13:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:56,289 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-14 05:13:56,290 INFO L472 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) [2024-11-14 05:13:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-14 05:13:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 05:13:56,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:56,290 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 05:13:56,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:13:56,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:56,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2024-11-14 05:13:56,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:56,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468927141] [2024-11-14 05:13:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:56,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:56,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468927141] [2024-11-14 05:13:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468927141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:13:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969200573] [2024-11-14 05:13:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:56,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:56,529 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:56,580 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2024-11-14 05:13:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:56,581 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 [2024-11-14 05:13:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:56,581 INFO L225 Difference]: With dead ends: 16 [2024-11-14 05:13:56,583 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 05:13:56,584 INFO L431 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 [2024-11-14 05:13:56,585 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 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 [2024-11-14 05:13:56,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:13:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 05:13:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-14 05:13:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-11-14 05:13:56,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2024-11-14 05:13:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:56,593 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-11-14 05:13:56,595 INFO L472 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) [2024-11-14 05:13:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-11-14 05:13:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:13:56,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:56,596 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 05:13:56,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:13:56,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:56,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 72378323, now seen corresponding path program 1 times [2024-11-14 05:13:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:56,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885636450] [2024-11-14 05:13:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:13:56,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885636450] [2024-11-14 05:13:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885636450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:56,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:56,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:13:56,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121231165] [2024-11-14 05:13:56,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:56,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:56,678 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:56,700 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-11-14 05:13:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 05:13:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:56,702 INFO L225 Difference]: With dead ends: 15 [2024-11-14 05:13:56,702 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 05:13:56,702 INFO L431 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 [2024-11-14 05:13:56,703 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:56,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:13:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 05:13:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 05:13:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-14 05:13:56,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2024-11-14 05:13:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:56,707 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-14 05:13:56,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-14 05:13:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 05:13:56,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:56,708 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 05:13:56,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:13:56,709 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:56,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 72377077, now seen corresponding path program 1 times [2024-11-14 05:13:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821618201] [2024-11-14 05:13:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:56,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821618201] [2024-11-14 05:13:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821618201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:56,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552171740] [2024-11-14 05:13:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:56,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:56,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:56,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:13:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:57,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:13:57,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:57,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 05:13:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:57,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:57,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552171740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:57,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062532784] [2024-11-14 05:13:57,391 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 05:13:57,392 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:57,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:57,403 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:57,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:57,884 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:58,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192#(exists ((|v_ULTIMATE.start_main_~i~0#1_28| Int) (|v_ULTIMATE.start_main_~p~0#1.base_44| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~p~0#1.base_44|) |v_ULTIMATE.start_main_~i~0#1_28|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet3#1|)) (<= |ULTIMATE.start_main_#t~nondet3#1| 127) (<= 0 |v_ULTIMATE.start_main_~i~0#1_28|)))' at error location [2024-11-14 05:13:58,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:58,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:58,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-14 05:13:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611422968] [2024-11-14 05:13:58,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:58,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:13:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:13:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:13:58,041 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2024-11-14 05:13:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:58,139 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-14 05:13:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:13:58,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) Word has length 5 [2024-11-14 05:13:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:58,141 INFO L225 Difference]: With dead ends: 21 [2024-11-14 05:13:58,141 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:13:58,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-14 05:13:58,142 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:58,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:13:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:13:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 05:13:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-14 05:13:58,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2024-11-14 05:13:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:58,147 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-14 05:13:58,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 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) [2024-11-14 05:13:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-14 05:13:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:13:58,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:58,148 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-14 05:13:58,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:13:58,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:58,353 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:58,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 112950109, now seen corresponding path program 1 times [2024-11-14 05:13:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293516011] [2024-11-14 05:13:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:13:58,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293516011] [2024-11-14 05:13:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293516011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 05:13:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921227715] [2024-11-14 05:13:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:58,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:58,427 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-11-14 05:13:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:58,464 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2024-11-14 05:13:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 8 [2024-11-14 05:13:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:58,465 INFO L225 Difference]: With dead ends: 20 [2024-11-14 05:13:58,465 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 05:13:58,466 INFO L431 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 [2024-11-14 05:13:58,467 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:58,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:13:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 05:13:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 05:13:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 05:13:58,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2024-11-14 05:13:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:58,471 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 05:13:58,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-11-14 05:13:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 05:13:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:13:58,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:58,472 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:58,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:13:58,473 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:58,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1170874080, now seen corresponding path program 1 times [2024-11-14 05:13:58,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:58,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851311588] [2024-11-14 05:13:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:58,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:58,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851311588] [2024-11-14 05:13:58,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851311588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:58,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976272176] [2024-11-14 05:13:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:58,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:58,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:58,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:58,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:13:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:58,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 05:13:58,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:58,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:58,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976272176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270444493] [2024-11-14 05:13:58,726 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:13:58,727 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:58,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:58,727 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:58,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:58,994 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:59,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '345#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_45| Int)) (and (<= (+ |v_ULTIMATE.start_main_~p~0#1.base_45| 1) |#StackHeapBarrier|) (or (= |v_ULTIMATE.start_main_~p~0#1.base_45| 0) (= (select |v_#valid_45| |v_ULTIMATE.start_main_~p~0#1.base_45|) 1)) (= (store |v_#valid_45| |v_ULTIMATE.start_main_~p~0#1.base_45| 0) |#valid|))) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2024-11-14 05:13:59,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:59,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:59,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 05:13:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13300445] [2024-11-14 05:13:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:59,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:13:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:13:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=149, Unknown=5, NotChecked=0, Total=210 [2024-11-14 05:13:59,171 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:59,221 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2024-11-14 05:13:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:13:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 05:13:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:59,223 INFO L225 Difference]: With dead ends: 23 [2024-11-14 05:13:59,223 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 05:13:59,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=149, Unknown=5, NotChecked=0, Total=210 [2024-11-14 05:13:59,225 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:59,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:13:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 05:13:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 05:13:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) 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) [2024-11-14 05:13:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-14 05:13:59,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 10 [2024-11-14 05:13:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:59,236 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-14 05:13:59,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-14 05:13:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 05:13:59,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:59,238 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-11-14 05:13:59,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:13:59,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:59,439 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:13:59,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 815866785, now seen corresponding path program 2 times [2024-11-14 05:13:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:59,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355495714] [2024-11-14 05:13:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:59,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355495714] [2024-11-14 05:13:59,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355495714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773662451] [2024-11-14 05:13:59,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:59,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:59,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:59,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:13:59,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:13:59,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:59,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:13:59,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:59,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 05:14:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:14:00,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:14:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773662451] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:00,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:14:00,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-14 05:14:00,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173245960] [2024-11-14 05:14:00,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:00,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:14:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:14:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:14:00,083 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:00,145 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2024-11-14 05:14:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:14:00,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 05:14:00,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:00,146 INFO L225 Difference]: With dead ends: 22 [2024-11-14 05:14:00,146 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 05:14:00,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:14:00,147 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:00,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:14:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 05:14:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 05:14:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2024-11-14 05:14:00,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2024-11-14 05:14:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:00,154 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2024-11-14 05:14:00,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2024-11-14 05:14:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 05:14:00,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:00,155 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:00,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:14:00,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:00,356 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:14:00,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:00,359 INFO L85 PathProgramCache]: Analyzing trace with hash -330514608, now seen corresponding path program 2 times [2024-11-14 05:14:00,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:00,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854002821] [2024-11-14 05:14:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:00,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854002821] [2024-11-14 05:14:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854002821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846676899] [2024-11-14 05:14:00,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:14:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:00,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:00,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:14:00,691 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:14:00,691 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:00,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:14:00,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:00,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:00,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846676899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:00,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311199439] [2024-11-14 05:14:00,902 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 05:14:00,903 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:00,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:00,904 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:00,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:01,125 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:01,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '596#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_46| Int) (|v_#valid_48| (Array Int Int))) (and (or (= |v_ULTIMATE.start_main_~p~0#1.base_46| 0) (= (select |v_#valid_48| |v_ULTIMATE.start_main_~p~0#1.base_46|) 1)) (<= (+ |v_ULTIMATE.start_main_~p~0#1.base_46| 1) |#StackHeapBarrier|) (= (store |v_#valid_48| |v_ULTIMATE.start_main_~p~0#1.base_46| 0) |#valid|))) (= |ULTIMATE.start_main_~p~0#1.offset| 0))' at error location [2024-11-14 05:14:01,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:01,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:01,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-14 05:14:01,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361469007] [2024-11-14 05:14:01,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:01,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:14:01,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:14:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=239, Unknown=5, NotChecked=0, Total=342 [2024-11-14 05:14:01,343 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:01,418 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2024-11-14 05:14:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:14:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 05:14:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:01,420 INFO L225 Difference]: With dead ends: 30 [2024-11-14 05:14:01,420 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 05:14:01,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=239, Unknown=5, NotChecked=0, Total=342 [2024-11-14 05:14:01,421 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:01,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:14:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 05:14:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 05:14:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2024-11-14 05:14:01,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 18 [2024-11-14 05:14:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:01,430 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2024-11-14 05:14:01,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:14:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2024-11-14 05:14:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 05:14:01,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:01,431 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:01,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:01,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:01,633 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 5 more)] === [2024-11-14 05:14:01,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1809846336, now seen corresponding path program 3 times [2024-11-14 05:14:01,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:01,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516604363] [2024-11-14 05:14:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:14:01,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 05:14:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:14:01,730 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 05:14:01,731 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 05:14:01,732 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 8 remaining) [2024-11-14 05:14:01,734 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-14 05:14:01,734 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-14 05:14:01,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (4 of 8 remaining) [2024-11-14 05:14:01,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (3 of 8 remaining) [2024-11-14 05:14:01,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2024-11-14 05:14:01,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-11-14 05:14:01,735 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-14 05:14:01,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 05:14:01,739 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2024-11-14 05:14:01,775 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 05:14:01,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 05:14:01 BoogieIcfgContainer [2024-11-14 05:14:01,782 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 05:14:01,782 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 05:14:01,783 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 05:14:01,783 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 05:14:01,784 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:13:55" (3/4) ... [2024-11-14 05:14:01,785 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-14 05:14:01,848 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 05:14:01,849 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 05:14:01,851 INFO L158 Benchmark]: Toolchain (without parser) took 7232.83ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 70.8MB in the end (delta: 21.3MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2024-11-14 05:14:01,851 INFO L158 Benchmark]: CDTParser took 0.86ms. Allocated memory is still 83.9MB. Free memory is still 41.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:14:01,852 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.05ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 81.7MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 05:14:01,852 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.95ms. Allocated memory is still 117.4MB. Free memory was 81.7MB in the beginning and 80.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:14:01,853 INFO L158 Benchmark]: Boogie Preprocessor took 38.80ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 80.2MB in the end (delta: 529.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:14:01,853 INFO L158 Benchmark]: RCFGBuilder took 510.69ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 65.1MB in the end (delta: 14.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:14:01,853 INFO L158 Benchmark]: TraceAbstraction took 6258.46ms. Allocated memory is still 117.4MB. Free memory was 64.1MB in the beginning and 73.0MB in the end (delta: -8.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:14:01,854 INFO L158 Benchmark]: Witness Printer took 66.76ms. Allocated memory is still 117.4MB. Free memory was 73.0MB in the beginning and 70.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:14:01,856 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86ms. Allocated memory is still 83.9MB. Free memory is still 41.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.05ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 81.7MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.95ms. Allocated memory is still 117.4MB. Free memory was 81.7MB in the beginning and 80.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.80ms. Allocated memory is still 117.4MB. Free memory was 80.7MB in the beginning and 80.2MB in the end (delta: 529.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 510.69ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 65.1MB in the end (delta: 14.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 6258.46ms. Allocated memory is still 117.4MB. Free memory was 64.1MB in the beginning and 73.0MB in the end (delta: -8.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 66.76ms. Allocated memory is still 117.4MB. Free memory was 73.0MB in the beginning and 70.8MB in the end (delta: 2.2MB). There was no memory consumed. 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 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=1, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=2, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=3, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=4, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=5, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=6, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=7, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=8, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=9, p={-1:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ VAL [i=10, p={-1:0}] [L10] COND FALSE !(i < 10) [L14] free(p) VAL [p={-1:0}] [L14] free(p) VAL [p={-1:0}] [L14] free(p) [L16] p[2] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 7]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 10, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 115 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 59 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 193 IncrementalHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 56 mSDtfsCounter, 193 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=9, 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 136 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 654 SizeOfPredicates, 0 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 25/171 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-14 05:14:01,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbf24136-0a35-4996-b913-7efdb0931c8e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)