./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:19:25,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:19:25,883 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:19:25,896 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:19:25,897 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:19:25,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:19:25,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:19:25,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:19:25,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:19:25,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:19:25,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:19:25,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:19:25,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:19:25,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:19:25,938 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:19:25,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:19:25,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:19:25,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:19:25,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:19:25,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:19:25,942 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:19:25,942 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:19:25,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:19:25,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:19:25,944 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:19:25,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:19:25,945 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:19:25,945 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:19:25,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:19:25,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:19:25,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:19:25,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:19:25,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:19:25,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:19:25,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:19:25,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:19:25,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:19:25,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:19:25,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:19:25,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:19:25,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:19:25,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:19:25,951 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 [2024-10-24 16:19:26,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:19:26,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:19:26,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:19:26,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:19:26,289 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:19:26,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2024-10-24 16:19:27,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:19:28,023 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:19:28,024 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2024-10-24 16:19:28,033 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b97bbbb8/887f9d1e7b024695a124d0c4ebdf85ed/FLAG90941fd4e [2024-10-24 16:19:28,398 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b97bbbb8/887f9d1e7b024695a124d0c4ebdf85ed [2024-10-24 16:19:28,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:19:28,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:19:28,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:19:28,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:19:28,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:19:28,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e96c1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28, skipping insertion in model container [2024-10-24 16:19:28,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:19:28,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:19:28,632 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:19:28,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:19:28,664 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:19:28,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28 WrapperNode [2024-10-24 16:19:28,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:19:28,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:19:28,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:19:28,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:19:28,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,683 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,703 INFO L138 Inliner]: procedures = 9, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2024-10-24 16:19:28,704 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:19:28,705 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:19:28,705 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:19:28,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:19:28,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,717 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,730 INFO L175 MemorySlicer]: Split 1 memory accesses to 1 slices as follows [1]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-10-24 16:19:28,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:19:28,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:19:28,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:19:28,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:19:28,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (1/1) ... [2024-10-24 16:19:28,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:19:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:19:28,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:19:28,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:19:28,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:19:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 16:19:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:19:28,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:19:28,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:19:28,890 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:19:28,892 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:19:29,023 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-24 16:19:29,023 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:19:29,041 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:19:29,042 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 16:19:29,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:19:29 BoogieIcfgContainer [2024-10-24 16:19:29,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:19:29,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:19:29,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:19:29,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:19:29,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:19:28" (1/3) ... [2024-10-24 16:19:29,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc8dd57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:19:29, skipping insertion in model container [2024-10-24 16:19:29,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:19:28" (2/3) ... [2024-10-24 16:19:29,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc8dd57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:19:29, skipping insertion in model container [2024-10-24 16:19:29,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:19:29" (3/3) ... [2024-10-24 16:19:29,054 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2024-10-24 16:19:29,073 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:19:29,074 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-24 16:19:29,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:19:29,143 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=PETRI_NET, 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;@704c2782, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:19:29,144 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-24 16:19:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.9) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:19:29,158 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:29,159 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:19:29,160 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:29,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash 63748, now seen corresponding path program 1 times [2024-10-24 16:19:29,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:29,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932575392] [2024-10-24 16:19:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932575392] [2024-10-24 16:19:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932575392] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:19:29,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:19:29,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:19:29,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251230296] [2024-10-24 16:19:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:19:29,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:19:29,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:19:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:19:29,466 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.9) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:29,513 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-24 16:19:29,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:19:29,516 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 [2024-10-24 16:19:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:29,522 INFO L225 Difference]: With dead ends: 22 [2024-10-24 16:19:29,522 INFO L226 Difference]: Without dead ends: 21 [2024-10-24 16:19:29,524 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 [2024-10-24 16:19:29,541 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:29,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:19:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-24 16:19:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-10-24 16:19:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 17 states have internal predecessors, (21), 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) [2024-10-24 16:19:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-24 16:19:29,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 3 [2024-10-24 16:19:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:29,588 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-24 16:19:29,588 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) [2024-10-24 16:19:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-24 16:19:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-24 16:19:29,589 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:29,589 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-24 16:19:29,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:19:29,590 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:29,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:29,591 INFO L85 PathProgramCache]: Analyzing trace with hash 63749, now seen corresponding path program 1 times [2024-10-24 16:19:29,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:29,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91309191] [2024-10-24 16:19:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:29,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91309191] [2024-10-24 16:19:29,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91309191] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:19:29,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:19:29,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:19:29,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393065974] [2024-10-24 16:19:29,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:19:29,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:19:29,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:19:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:19:29,748 INFO L87 Difference]: Start difference. First operand 18 states and 21 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) [2024-10-24 16:19:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:29,811 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-24 16:19:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:19:29,813 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 [2024-10-24 16:19:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:29,814 INFO L225 Difference]: With dead ends: 22 [2024-10-24 16:19:29,814 INFO L226 Difference]: Without dead ends: 22 [2024-10-24 16:19:29,814 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 [2024-10-24 16:19:29,816 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:29,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:19:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-24 16:19:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-10-24 16:19:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 20 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) [2024-10-24 16:19:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-24 16:19:29,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 3 [2024-10-24 16:19:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:29,825 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-24 16:19:29,825 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) [2024-10-24 16:19:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-24 16:19:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:19:29,827 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:29,827 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-24 16:19:29,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:19:29,828 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:29,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1257108664, now seen corresponding path program 1 times [2024-10-24 16:19:29,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:29,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102285134] [2024-10-24 16:19:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:29,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102285134] [2024-10-24 16:19:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102285134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:19:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190274021] [2024-10-24 16:19:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:30,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:19:30,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:19:30,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:19:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:30,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:19:30,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:19:30,241 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 [2024-10-24 16:19:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:30,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:19:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190274021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:19:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:19:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 16:19:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628946715] [2024-10-24 16:19:30,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:19:30,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:19:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:19:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:19:30,484 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-24 16:19:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:30,623 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-10-24 16:19:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:19:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 16:19:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:30,624 INFO L225 Difference]: With dead ends: 29 [2024-10-24 16:19:30,625 INFO L226 Difference]: Without dead ends: 29 [2024-10-24 16:19:30,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:19:30,626 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:30,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 8 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:19:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-24 16:19:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-24 16:19:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-10-24 16:19:30,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2024-10-24 16:19:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:30,632 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-10-24 16:19:30,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-24 16:19:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-10-24 16:19:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-24 16:19:30,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:30,632 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2024-10-24 16:19:30,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 16:19:30,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:30,833 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:30,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash 162763176, now seen corresponding path program 1 times [2024-10-24 16:19:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:30,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857966788] [2024-10-24 16:19:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 16:19:30,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857966788] [2024-10-24 16:19:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857966788] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:19:30,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:19:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:19:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869464936] [2024-10-24 16:19:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:19:30,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:19:30,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:19:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:19:30,911 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:30,928 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-10-24 16:19:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:19:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-24 16:19:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:30,931 INFO L225 Difference]: With dead ends: 28 [2024-10-24 16:19:30,931 INFO L226 Difference]: Without dead ends: 28 [2024-10-24 16:19:30,931 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 [2024-10-24 16:19:30,933 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:30,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:19:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-24 16:19:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-24 16:19:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 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) [2024-10-24 16:19:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-24 16:19:30,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2024-10-24 16:19:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:30,939 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-24 16:19:30,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-24 16:19:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 16:19:30,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:30,941 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:19:30,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:19:30,942 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:30,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -52758481, now seen corresponding path program 1 times [2024-10-24 16:19:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876928899] [2024-10-24 16:19:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:31,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876928899] [2024-10-24 16:19:31,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876928899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:19:31,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877863898] [2024-10-24 16:19:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:19:31,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:19:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:19:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:31,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 16:19:31,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:19:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:19:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877863898] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:19:31,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:19:31,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-24 16:19:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928100897] [2024-10-24 16:19:31,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:19:31,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:19:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:19:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:19:31,180 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:31,238 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2024-10-24 16:19:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:19:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-24 16:19:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:31,240 INFO L225 Difference]: With dead ends: 35 [2024-10-24 16:19:31,240 INFO L226 Difference]: Without dead ends: 35 [2024-10-24 16:19:31,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:19:31,241 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:31,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:19:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-24 16:19:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-10-24 16:19:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-10-24 16:19:31,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 18 [2024-10-24 16:19:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:31,250 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-10-24 16:19:31,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:19:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-10-24 16:19:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:19:31,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:31,251 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2024-10-24 16:19:31,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:19:31,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:31,452 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:31,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1837805607, now seen corresponding path program 1 times [2024-10-24 16:19:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:31,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951407899] [2024-10-24 16:19:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:19:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951407899] [2024-10-24 16:19:31,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951407899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:19:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610149195] [2024-10-24 16:19:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:31,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:19:31,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:19:31,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:19:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:19:31,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:19:31,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:19:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:19:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:19:31,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610149195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:19:31,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:19:31,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-24 16:19:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870735318] [2024-10-24 16:19:31,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:19:31,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 16:19:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:19:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 16:19:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:19:31,874 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2024-10-24 16:19:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:19:31,952 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-10-24 16:19:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:19:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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 24 [2024-10-24 16:19:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:19:31,954 INFO L225 Difference]: With dead ends: 49 [2024-10-24 16:19:31,954 INFO L226 Difference]: Without dead ends: 49 [2024-10-24 16:19:31,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:19:31,955 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:19:31,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:19:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-24 16:19:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-10-24 16:19:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 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) [2024-10-24 16:19:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-10-24 16:19:31,961 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2024-10-24 16:19:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:19:31,962 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-10-24 16:19:31,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 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) [2024-10-24 16:19:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-10-24 16:19:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 16:19:31,963 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:19:31,963 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2024-10-24 16:19:31,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 16:19:32,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:19:32,164 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2024-10-24 16:19:32,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:19:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1316000454, now seen corresponding path program 2 times [2024-10-24 16:19:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:19:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044673862] [2024-10-24 16:19:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:19:32,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:19:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 16:19:32,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 16:19:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 16:19:32,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 16:19:32,239 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 16:19:32,240 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2024-10-24 16:19:32,243 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2024-10-24 16:19:32,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2024-10-24 16:19:32,244 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2024-10-24 16:19:32,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (1 of 6 remaining) [2024-10-24 16:19:32,245 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2024-10-24 16:19:32,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 16:19:32,249 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2024-10-24 16:19:32,280 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-24 16:19:32,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:19:32 BoogieIcfgContainer [2024-10-24 16:19:32,282 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-24 16:19:32,283 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-24 16:19:32,283 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-24 16:19:32,283 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-24 16:19:32,284 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:19:29" (3/4) ... [2024-10-24 16:19:32,285 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-24 16:19:32,339 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-24 16:19:32,339 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-24 16:19:32,340 INFO L158 Benchmark]: Toolchain (without parser) took 3938.45ms. Allocated memory was 142.6MB in the beginning and 182.5MB in the end (delta: 39.8MB). Free memory was 86.1MB in the beginning and 114.4MB in the end (delta: -28.2MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2024-10-24 16:19:32,340 INFO L158 Benchmark]: CDTParser took 0.90ms. Allocated memory is still 142.6MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 16:19:32,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.46ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 75.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 16:19:32,341 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.93ms. Allocated memory is still 142.6MB. Free memory was 74.5MB in the beginning and 73.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 16:19:32,342 INFO L158 Benchmark]: Boogie Preprocessor took 39.46ms. Allocated memory is still 142.6MB. Free memory was 73.4MB in the beginning and 71.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 16:19:32,342 INFO L158 Benchmark]: RCFGBuilder took 297.60ms. Allocated memory is still 142.6MB. Free memory was 71.5MB in the beginning and 60.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 16:19:32,343 INFO L158 Benchmark]: TraceAbstraction took 3237.81ms. Allocated memory was 142.6MB in the beginning and 182.5MB in the end (delta: 39.8MB). Free memory was 59.8MB in the beginning and 117.5MB in the end (delta: -57.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 16:19:32,343 INFO L158 Benchmark]: Witness Printer took 56.60ms. Allocated memory is still 182.5MB. Free memory was 117.5MB in the beginning and 114.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 16:19:32,345 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90ms. Allocated memory is still 142.6MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.46ms. Allocated memory is still 142.6MB. Free memory was 86.1MB in the beginning and 75.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.93ms. Allocated memory is still 142.6MB. Free memory was 74.5MB in the beginning and 73.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.46ms. Allocated memory is still 142.6MB. Free memory was 73.4MB in the beginning and 71.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 297.60ms. Allocated memory is still 142.6MB. Free memory was 71.5MB in the beginning and 60.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3237.81ms. Allocated memory was 142.6MB in the beginning and 182.5MB in the end (delta: 39.8MB). Free memory was 59.8MB in the beginning and 117.5MB in the end (delta: -57.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 56.60ms. Allocated memory is still 182.5MB. Free memory was 117.5MB in the beginning and 114.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=0, p={-1:0}] [L9] p[i] = 1 [L10] COND FALSE !(i == 5) VAL [i=0, p={-1:0}] [L8] i++ VAL [i=1, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=1, p={-1:0}] [L9] p[i] = 1 [L10] COND FALSE !(i == 5) VAL [i=1, p={-1:0}] [L8] i++ VAL [i=2, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=2, p={-1:0}] [L9] p[i] = 1 [L10] COND FALSE !(i == 5) VAL [i=2, p={-1:0}] [L8] i++ VAL [i=3, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=3, p={-1:0}] [L9] p[i] = 1 [L10] COND FALSE !(i == 5) VAL [i=3, p={-1:0}] [L8] i++ VAL [i=4, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=4, p={-1:0}] [L9] p[i] = 1 [L10] COND FALSE !(i == 5) VAL [i=4, p={-1:0}] [L8] i++ VAL [i=5, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=5, p={-1:0}] [L9] p[i] = 1 [L10] COND TRUE i == 5 VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) [L8] i++ VAL [i=6, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=6, p={-1:0}] [L9] p[i] = 1 - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 5]: 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, 6 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43 mSDsluCounter, 77 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 32 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 218 IncrementalHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 45 mSDtfsCounter, 218 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, InterpolantAutomatonStates: 35, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 644 SizeOfPredicates, 0 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 34/205 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! [2024-10-24 16:19:32,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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)