./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_update_all.i -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 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 23:11:41,003 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 23:11:41,054 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 23:11:41,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 23:11:41,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 23:11:41,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 23:11:41,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 23:11:41,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 23:11:41,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 23:11:41,081 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 23:11:41,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 23:11:41,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 23:11:41,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 23:11:41,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 23:11:41,082 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 23:11:41,083 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 23:11:41,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 23:11:41,083 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2025-03-08 23:11:41,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 23:11:41,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 23:11:41,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 23:11:41,340 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 23:11:41,340 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 23:11:41,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_update_all.i [2025-03-08 23:11:42,505 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd0d76a7/230d8a7987564802ba74d95a5c9ade9f/FLAG04a07d74d [2025-03-08 23:11:42,763 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 23:11:42,764 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_update_all.i [2025-03-08 23:11:42,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd0d76a7/230d8a7987564802ba74d95a5c9ade9f/FLAG04a07d74d [2025-03-08 23:11:43,079 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd0d76a7/230d8a7987564802ba74d95a5c9ade9f [2025-03-08 23:11:43,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 23:11:43,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 23:11:43,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 23:11:43,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 23:11:43,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 23:11:43,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43, skipping insertion in model container [2025-03-08 23:11:43,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,119 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 23:11:43,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 23:11:43,352 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 23:11:43,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 23:11:43,420 INFO L204 MainTranslator]: Completed translation [2025-03-08 23:11:43,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43 WrapperNode [2025-03-08 23:11:43,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 23:11:43,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 23:11:43,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 23:11:43,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 23:11:43,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,455 INFO L138 Inliner]: procedures = 126, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 109 [2025-03-08 23:11:43,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 23:11:43,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 23:11:43,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 23:11:43,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 23:11:43,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,466 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,482 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2025-03-08 23:11:43,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,487 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 23:11:43,491 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 23:11:43,491 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 23:11:43,491 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 23:11:43,492 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (1/1) ... [2025-03-08 23:11:43,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 23:11:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:43,517 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) [2025-03-08 23:11:43,519 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 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 23:11:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 23:11:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 23:11:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 23:11:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 23:11:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 23:11:43,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 23:11:43,629 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 23:11:43,630 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 23:11:43,832 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint myexit_returnLabel#1: havoc myexit_~s#1;havoc myexit_#in~s#1;assume { :end_inline_myexit } true; [2025-03-08 23:11:43,833 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L604: havoc sll_get_data_at_#t~mem9#1; [2025-03-08 23:11:43,851 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2025-03-08 23:11:43,851 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 23:11:43,861 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 23:11:43,863 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 23:11:43,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 11:11:43 BoogieIcfgContainer [2025-03-08 23:11:43,864 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 23:11:43,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 23:11:43,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 23:11:43,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 23:11:43,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 11:11:43" (1/3) ... [2025-03-08 23:11:43,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7c154d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 11:11:43, skipping insertion in model container [2025-03-08 23:11:43,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:11:43" (2/3) ... [2025-03-08 23:11:43,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7c154d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 11:11:43, skipping insertion in model container [2025-03-08 23:11:43,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 11:11:43" (3/3) ... [2025-03-08 23:11:43,872 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2025-03-08 23:11:43,883 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 23:11:43,884 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_update_all.i that has 1 procedures, 61 locations, 1 initial locations, 6 loop locations, and 21 error locations. [2025-03-08 23:11:43,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 23:11:43,924 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;@5cb922f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 23:11:43,924 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2025-03-08 23:11:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 60 states have internal predecessors, (69), 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) [2025-03-08 23:11:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 23:11:43,930 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:43,931 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 23:11:43,931 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:43,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 102078822, now seen corresponding path program 1 times [2025-03-08 23:11:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:43,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4634797] [2025-03-08 23:11:43,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:43,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 23:11:44,002 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 23:11:44,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4634797] [2025-03-08 23:11:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4634797] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:11:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529285414] [2025-03-08 23:11:44,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:44,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:11:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:44,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:11:44,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:11:44,117 INFO L87 Difference]: Start difference. First operand has 61 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 60 states have internal predecessors, (69), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:44,173 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2025-03-08 23:11:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:11:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-08 23:11:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:44,178 INFO L225 Difference]: With dead ends: 58 [2025-03-08 23:11:44,179 INFO L226 Difference]: Without dead ends: 55 [2025-03-08 23:11:44,180 INFO L434 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 [2025-03-08 23:11:44,181 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:44,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-08 23:11:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-03-08 23:11:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 54 states have internal predecessors, (60), 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) [2025-03-08 23:11:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2025-03-08 23:11:44,202 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 5 [2025-03-08 23:11:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:44,202 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2025-03-08 23:11:44,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2025-03-08 23:11:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 23:11:44,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:44,203 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 23:11:44,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 23:11:44,203 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:44,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 102078823, now seen corresponding path program 1 times [2025-03-08 23:11:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:44,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708422519] [2025-03-08 23:11:44,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:44,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 23:11:44,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 23:11:44,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708422519] [2025-03-08 23:11:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708422519] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:11:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261567723] [2025-03-08 23:11:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:44,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:11:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:44,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:11:44,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:11:44,315 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:44,345 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2025-03-08 23:11:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:11:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-08 23:11:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:44,346 INFO L225 Difference]: With dead ends: 53 [2025-03-08 23:11:44,346 INFO L226 Difference]: Without dead ends: 53 [2025-03-08 23:11:44,347 INFO L434 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 [2025-03-08 23:11:44,347 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:44,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-08 23:11:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-03-08 23:11:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 52 states have internal predecessors, (58), 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) [2025-03-08 23:11:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2025-03-08 23:11:44,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 5 [2025-03-08 23:11:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:44,353 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2025-03-08 23:11:44,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2025-03-08 23:11:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 23:11:44,353 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:44,353 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:44,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 23:11:44,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:44,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -703702026, now seen corresponding path program 1 times [2025-03-08 23:11:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871656892] [2025-03-08 23:11:44,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:44,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 23:11:44,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 23:11:44,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871656892] [2025-03-08 23:11:44,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871656892] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:44,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 23:11:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94914996] [2025-03-08 23:11:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:44,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:11:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:44,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:11:44,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:11:44,406 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-03-08 23:11:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:44,415 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2025-03-08 23:11:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:11:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 [2025-03-08 23:11:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:44,416 INFO L225 Difference]: With dead ends: 63 [2025-03-08 23:11:44,416 INFO L226 Difference]: Without dead ends: 63 [2025-03-08 23:11:44,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:11:44,416 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 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 [2025-03-08 23:11:44,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-08 23:11:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2025-03-08 23:11:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 53 states have internal predecessors, (59), 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) [2025-03-08 23:11:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2025-03-08 23:11:44,420 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 7 [2025-03-08 23:11:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:44,420 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2025-03-08 23:11:44,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2025-03-08 23:11:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2025-03-08 23:11:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 23:11:44,421 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:44,421 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:44,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 23:11:44,421 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:44,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1699668738, now seen corresponding path program 1 times [2025-03-08 23:11:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61836915] [2025-03-08 23:11:44,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:44,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 23:11:44,435 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 23:11:44,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61836915] [2025-03-08 23:11:44,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61836915] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:44,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 23:11:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564913223] [2025-03-08 23:11:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:44,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 23:11:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:44,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 23:11:44,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:44,514 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:44,586 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2025-03-08 23:11:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 23:11:44,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-08 23:11:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:44,587 INFO L225 Difference]: With dead ends: 53 [2025-03-08 23:11:44,587 INFO L226 Difference]: Without dead ends: 53 [2025-03-08 23:11:44,587 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:44,588 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:44,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 147 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-08 23:11:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-03-08 23:11:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 52 states have internal predecessors, (58), 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) [2025-03-08 23:11:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2025-03-08 23:11:44,593 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 9 [2025-03-08 23:11:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:44,593 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2025-03-08 23:11:44,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2025-03-08 23:11:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 23:11:44,594 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:44,594 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:44,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 23:11:44,594 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:44,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1699668739, now seen corresponding path program 1 times [2025-03-08 23:11:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765006603] [2025-03-08 23:11:44,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:44,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 23:11:44,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 23:11:44,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765006603] [2025-03-08 23:11:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765006603] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:44,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 23:11:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694694894] [2025-03-08 23:11:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:44,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 23:11:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:44,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 23:11:44,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:44,718 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:44,774 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2025-03-08 23:11:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 23:11:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-08 23:11:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:44,775 INFO L225 Difference]: With dead ends: 52 [2025-03-08 23:11:44,775 INFO L226 Difference]: Without dead ends: 52 [2025-03-08 23:11:44,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:44,777 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:44,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 158 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-08 23:11:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-03-08 23:11:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 51 states have internal predecessors, (57), 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) [2025-03-08 23:11:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2025-03-08 23:11:44,780 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 9 [2025-03-08 23:11:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:44,780 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2025-03-08 23:11:44,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2025-03-08 23:11:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 23:11:44,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:44,780 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:44,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 23:11:44,781 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:44,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1953824669, now seen corresponding path program 1 times [2025-03-08 23:11:44,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:44,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336842473] [2025-03-08 23:11:44,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:44,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 23:11:44,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 23:11:44,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336842473] [2025-03-08 23:11:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336842473] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700594323] [2025-03-08 23:11:44,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:44,868 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) [2025-03-08 23:11:44,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 23:11:44,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 23:11:44,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 23:11:44,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:44,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:44,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 23:11:44,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:45,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700594323] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:45,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2025-03-08 23:11:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203877012] [2025-03-08 23:11:45,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:45,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 23:11:45,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:45,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 23:11:45,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:45,046 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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) [2025-03-08 23:11:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:45,058 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2025-03-08 23:11:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 23:11:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-08 23:11:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:45,060 INFO L225 Difference]: With dead ends: 60 [2025-03-08 23:11:45,060 INFO L226 Difference]: Without dead ends: 60 [2025-03-08 23:11:45,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:45,060 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:45,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-08 23:11:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-08 23:11:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 59 states have internal predecessors, (65), 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) [2025-03-08 23:11:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2025-03-08 23:11:45,065 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 15 [2025-03-08 23:11:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:45,066 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2025-03-08 23:11:45,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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) [2025-03-08 23:11:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2025-03-08 23:11:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 23:11:45,066 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:45,066 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:45,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:45,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 23:11:45,267 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:45,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1741878204, now seen corresponding path program 2 times [2025-03-08 23:11:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:45,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643264053] [2025-03-08 23:11:45,269 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:11:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:45,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 23:11:45,284 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 23 statements. [2025-03-08 23:11:45,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 23:11:45,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:45,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643264053] [2025-03-08 23:11:45,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643264053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:45,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:45,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 23:11:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370678978] [2025-03-08 23:11:45,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:45,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 23:11:45,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:45,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 23:11:45,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 23:11:45,316 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2025-03-08 23:11:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:45,343 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2025-03-08 23:11:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 23:11:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-08 23:11:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:45,345 INFO L225 Difference]: With dead ends: 82 [2025-03-08 23:11:45,345 INFO L226 Difference]: Without dead ends: 82 [2025-03-08 23:11:45,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:45,346 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:45,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 144 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-08 23:11:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2025-03-08 23:11:45,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.446808510638298) internal successors, (68), 61 states have internal predecessors, (68), 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) [2025-03-08 23:11:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2025-03-08 23:11:45,348 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 23 [2025-03-08 23:11:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:45,349 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2025-03-08 23:11:45,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2025-03-08 23:11:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2025-03-08 23:11:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 23:11:45,349 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:45,349 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:45,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 23:11:45,350 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:45,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1741878177, now seen corresponding path program 1 times [2025-03-08 23:11:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:45,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842121577] [2025-03-08 23:11:45,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:45,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 23:11:45,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 23:11:45,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:45,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 23:11:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:45,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842121577] [2025-03-08 23:11:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842121577] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:45,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:45,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:11:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018613414] [2025-03-08 23:11:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:45,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:11:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:45,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:11:45,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:45,482 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 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) [2025-03-08 23:11:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:45,642 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2025-03-08 23:11:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:11:45,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 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 23 [2025-03-08 23:11:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:45,643 INFO L225 Difference]: With dead ends: 65 [2025-03-08 23:11:45,643 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 23:11:45,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-08 23:11:45,644 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:45,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 197 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 23:11:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-08 23:11:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.48) internal successors, (74), 64 states have internal predecessors, (74), 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) [2025-03-08 23:11:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2025-03-08 23:11:45,649 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 23 [2025-03-08 23:11:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:45,650 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2025-03-08 23:11:45,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 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) [2025-03-08 23:11:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2025-03-08 23:11:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 23:11:45,650 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:45,650 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:45,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 23:11:45,650 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:45,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1741878176, now seen corresponding path program 1 times [2025-03-08 23:11:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971893305] [2025-03-08 23:11:45,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:45,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 23:11:45,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 23:11:45,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:45,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:11:45,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:45,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971893305] [2025-03-08 23:11:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971893305] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:45,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:45,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:11:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546580414] [2025-03-08 23:11:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:45,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:11:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:45,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:11:45,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:45,887 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2025-03-08 23:11:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:46,061 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2025-03-08 23:11:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:11:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) Word has length 23 [2025-03-08 23:11:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:46,062 INFO L225 Difference]: With dead ends: 65 [2025-03-08 23:11:46,063 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 23:11:46,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-08 23:11:46,063 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:46,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 233 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 23:11:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-08 23:11:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 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) [2025-03-08 23:11:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2025-03-08 23:11:46,067 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 23 [2025-03-08 23:11:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:46,067 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2025-03-08 23:11:46,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2025-03-08 23:11:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2025-03-08 23:11:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 23:11:46,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:46,067 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:46,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 23:11:46,067 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:46,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1835994074, now seen corresponding path program 1 times [2025-03-08 23:11:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:46,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456051919] [2025-03-08 23:11:46,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:46,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 23:11:46,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 23:11:46,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:46,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456051919] [2025-03-08 23:11:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456051919] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:46,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:46,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 23:11:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885248092] [2025-03-08 23:11:46,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:46,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 23:11:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:46,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 23:11:46,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 23:11:46,140 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2025-03-08 23:11:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:46,153 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2025-03-08 23:11:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 23:11:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-08 23:11:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:46,154 INFO L225 Difference]: With dead ends: 83 [2025-03-08 23:11:46,154 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 23:11:46,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 23:11:46,155 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 49 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:46,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 23:11:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2025-03-08 23:11:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.411764705882353) internal successors, (72), 65 states have internal predecessors, (72), 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) [2025-03-08 23:11:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2025-03-08 23:11:46,161 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 24 [2025-03-08 23:11:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:46,162 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2025-03-08 23:11:46,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2025-03-08 23:11:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2025-03-08 23:11:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 23:11:46,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:46,162 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:46,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 23:11:46,162 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:46,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:46,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1727908053, now seen corresponding path program 1 times [2025-03-08 23:11:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:46,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022922949] [2025-03-08 23:11:46,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:46,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:46,173 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:11:46,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:11:46,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:46,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-08 23:11:46,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:46,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022922949] [2025-03-08 23:11:46,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022922949] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:46,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:46,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 23:11:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200275212] [2025-03-08 23:11:46,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:46,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 23:11:46,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:46,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 23:11:46,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 23:11:46,216 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:46,235 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2025-03-08 23:11:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 23:11:46,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-08 23:11:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:46,236 INFO L225 Difference]: With dead ends: 79 [2025-03-08 23:11:46,236 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 23:11:46,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 23:11:46,236 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:46,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 147 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 23:11:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2025-03-08 23:11:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 66 states have internal predecessors, (73), 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) [2025-03-08 23:11:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2025-03-08 23:11:46,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 28 [2025-03-08 23:11:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:46,239 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2025-03-08 23:11:46,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2025-03-08 23:11:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 23:11:46,240 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:46,240 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:46,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 23:11:46,240 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:46,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1727908026, now seen corresponding path program 1 times [2025-03-08 23:11:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748335135] [2025-03-08 23:11:46,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:46,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:11:46,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:11:46,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:46,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 23:11:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748335135] [2025-03-08 23:11:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748335135] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:46,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:11:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433565465] [2025-03-08 23:11:46,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:46,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:11:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:46,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:11:46,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:46,384 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:46,534 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2025-03-08 23:11:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:11:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-08 23:11:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:46,535 INFO L225 Difference]: With dead ends: 70 [2025-03-08 23:11:46,535 INFO L226 Difference]: Without dead ends: 70 [2025-03-08 23:11:46,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-08 23:11:46,535 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:46,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 197 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-08 23:11:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-08 23:11:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 69 states have internal predecessors, (79), 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) [2025-03-08 23:11:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2025-03-08 23:11:46,537 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 28 [2025-03-08 23:11:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:46,537 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2025-03-08 23:11:46,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2025-03-08 23:11:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 23:11:46,538 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:46,538 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:46,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 23:11:46,538 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:46,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1727908025, now seen corresponding path program 1 times [2025-03-08 23:11:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534795465] [2025-03-08 23:11:46,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:46,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:11:46,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:11:46,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:46,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:46,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534795465] [2025-03-08 23:11:46,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534795465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255982117] [2025-03-08 23:11:46,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:46,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:46,622 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) [2025-03-08 23:11:46,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 23:11:46,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:11:46,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:11:46,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:46,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:46,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 23:11:46,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:46,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255982117] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:46,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:46,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-03-08 23:11:46,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053810442] [2025-03-08 23:11:46,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:46,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 23:11:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:46,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 23:11:46,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-08 23:11:46,832 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2025-03-08 23:11:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:46,857 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2025-03-08 23:11:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 23:11:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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 28 [2025-03-08 23:11:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:46,858 INFO L225 Difference]: With dead ends: 83 [2025-03-08 23:11:46,858 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 23:11:46,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-08 23:11:46,858 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 76 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:46,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 185 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 23:11:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2025-03-08 23:11:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 77 states have internal predecessors, (89), 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) [2025-03-08 23:11:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2025-03-08 23:11:46,861 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 28 [2025-03-08 23:11:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:46,861 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2025-03-08 23:11:46,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2025-03-08 23:11:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2025-03-08 23:11:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:11:46,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:46,864 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:46,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:47,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 23:11:47,069 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:47,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1957139881, now seen corresponding path program 1 times [2025-03-08 23:11:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:47,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225474167] [2025-03-08 23:11:47,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:47,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:47,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:47,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:47,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:47,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:47,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:47,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225474167] [2025-03-08 23:11:47,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225474167] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:47,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685788688] [2025-03-08 23:11:47,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:47,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:47,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:47,179 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) [2025-03-08 23:11:47,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 23:11:47,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:47,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:47,292 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:47,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:47,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 23:11:47,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:47,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685788688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:47,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2025-03-08 23:11:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531041390] [2025-03-08 23:11:47,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:47,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 23:11:47,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:47,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 23:11:47,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 23:11:47,351 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2025-03-08 23:11:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:47,392 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2025-03-08 23:11:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 23:11:47,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 30 [2025-03-08 23:11:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:47,393 INFO L225 Difference]: With dead ends: 110 [2025-03-08 23:11:47,393 INFO L226 Difference]: Without dead ends: 110 [2025-03-08 23:11:47,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 23:11:47,394 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:47,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 192 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-08 23:11:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2025-03-08 23:11:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 81 states have internal predecessors, (94), 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) [2025-03-08 23:11:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2025-03-08 23:11:47,398 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 30 [2025-03-08 23:11:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:47,398 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2025-03-08 23:11:47,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2025-03-08 23:11:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2025-03-08 23:11:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:11:47,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:47,399 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:47,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:47,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:47,601 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:47,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1957139908, now seen corresponding path program 1 times [2025-03-08 23:11:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525340132] [2025-03-08 23:11:47,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:47,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:47,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:47,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:47,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:11:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525340132] [2025-03-08 23:11:48,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525340132] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565899499] [2025-03-08 23:11:48,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:48,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 23:11:48,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:48,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:48,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:48,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:48,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-08 23:11:48,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:48,242 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:11:48,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-08 23:11:48,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:11:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:11:48,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2025-03-08 23:11:48,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-03-08 23:11:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:48,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565899499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:48,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:48,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2025-03-08 23:11:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414694585] [2025-03-08 23:11:48,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:48,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 23:11:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:48,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 23:11:48,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 23:11:48,909 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 36 states have internal predecessors, (69), 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) [2025-03-08 23:11:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:49,569 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2025-03-08 23:11:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 23:11:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 36 states have internal predecessors, (69), 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 30 [2025-03-08 23:11:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:49,571 INFO L225 Difference]: With dead ends: 127 [2025-03-08 23:11:49,571 INFO L226 Difference]: Without dead ends: 127 [2025-03-08 23:11:49,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 23:11:49,573 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:49,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 641 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 23:11:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-08 23:11:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2025-03-08 23:11:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 90 states have internal predecessors, (108), 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) [2025-03-08 23:11:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2025-03-08 23:11:49,580 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 30 [2025-03-08 23:11:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:49,580 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2025-03-08 23:11:49,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 36 states have internal predecessors, (69), 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) [2025-03-08 23:11:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2025-03-08 23:11:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:11:49,581 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:49,584 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:49,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 23:11:49,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 23:11:49,785 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:49,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1957139909, now seen corresponding path program 1 times [2025-03-08 23:11:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963948182] [2025-03-08 23:11:49,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:49,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:49,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:49,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:49,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:11:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963948182] [2025-03-08 23:11:50,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963948182] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747528126] [2025-03-08 23:11:50,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:50,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:50,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 23:11:50,466 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:11:50,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:11:50,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:50,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:50,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-08 23:11:50,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:50,506 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 [2025-03-08 23:11:50,574 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:11:50,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:11:50,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 23:11:50,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-08 23:11:50,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:11:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:11:50,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-08 23:11:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:11:50,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2025-03-08 23:11:50,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2025-03-08 23:11:50,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-03-08 23:11:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:11:50,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:51,152 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_703 (Array Int Int))) (or (forall ((v_ArrVal_704 (Array Int Int))) (or (not (= v_ArrVal_704 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_704 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (< (+ 3 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_703) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_704) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))))) (not (= v_ArrVal_703 (store .cse1 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_703 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))))) (forall ((v_ArrVal_703 (Array Int Int))) (or (not (= v_ArrVal_703 (store .cse1 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_703 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (< 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_703) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) 1)))))) is different from false [2025-03-08 23:11:51,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:11:51,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2025-03-08 23:11:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2025-03-08 23:11:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747528126] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:51,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:51,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 42 [2025-03-08 23:11:51,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415365326] [2025-03-08 23:11:51,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:51,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 23:11:51,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:51,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 23:11:51,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1608, Unknown=1, NotChecked=80, Total=1806 [2025-03-08 23:11:51,689 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 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) [2025-03-08 23:11:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:52,811 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2025-03-08 23:11:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 23:11:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 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 30 [2025-03-08 23:11:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:52,812 INFO L225 Difference]: With dead ends: 140 [2025-03-08 23:11:52,812 INFO L226 Difference]: Without dead ends: 140 [2025-03-08 23:11:52,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=248, Invalid=2725, Unknown=1, NotChecked=106, Total=3080 [2025-03-08 23:11:52,813 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:52,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 964 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1301 Invalid, 0 Unknown, 83 Unchecked, 0.6s Time] [2025-03-08 23:11:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-08 23:11:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 98. [2025-03-08 23:11:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 97 states have internal predecessors, (118), 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) [2025-03-08 23:11:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2025-03-08 23:11:52,821 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 30 [2025-03-08 23:11:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:52,821 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2025-03-08 23:11:52,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 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) [2025-03-08 23:11:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2025-03-08 23:11:52,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 23:11:52,822 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:52,822 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:52,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:53,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 23:11:53,023 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:53,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 384768485, now seen corresponding path program 2 times [2025-03-08 23:11:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096899310] [2025-03-08 23:11:53,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:11:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:53,039 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 23:11:53,048 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 23:11:53,048 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:11:53,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 23:11:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:53,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096899310] [2025-03-08 23:11:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096899310] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:53,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:11:53,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:11:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799218439] [2025-03-08 23:11:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:53,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:11:53,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:53,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:11:53,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:53,225 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:53,353 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2025-03-08 23:11:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:11:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2025-03-08 23:11:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:53,353 INFO L225 Difference]: With dead ends: 98 [2025-03-08 23:11:53,353 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 23:11:53,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-08 23:11:53,354 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:53,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 233 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:11:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 23:11:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2025-03-08 23:11:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 97 states have internal predecessors, (115), 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) [2025-03-08 23:11:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2025-03-08 23:11:53,357 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 32 [2025-03-08 23:11:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:53,358 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2025-03-08 23:11:53,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2025-03-08 23:11:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 23:11:53,358 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:53,358 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-08 23:11:53,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-08 23:11:53,358 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:53,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash -137912156, now seen corresponding path program 2 times [2025-03-08 23:11:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:53,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485267691] [2025-03-08 23:11:53,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:11:53,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:53,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 23:11:53,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 23:11:53,381 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:11:53,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:11:53,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485267691] [2025-03-08 23:11:53,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485267691] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:53,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105836282] [2025-03-08 23:11:53,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:11:53,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:53,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:53,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:53,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 23:11:53,510 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 23:11:53,555 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 23:11:53,555 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:11:53,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:53,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 23:11:53,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 23:11:53,617 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 23:11:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105836282] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:11:53,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 23:11:53,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2025-03-08 23:11:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001326123] [2025-03-08 23:11:53,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:11:53,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 23:11:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:53,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 23:11:53,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:53,618 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:53,638 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2025-03-08 23:11:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 23:11:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2025-03-08 23:11:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:53,639 INFO L225 Difference]: With dead ends: 79 [2025-03-08 23:11:53,639 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 23:11:53,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:11:53,639 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:53,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 125 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 23:11:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2025-03-08 23:11:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 71 states have internal predecessors, (77), 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) [2025-03-08 23:11:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2025-03-08 23:11:53,641 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2025-03-08 23:11:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:53,641 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2025-03-08 23:11:53,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:11:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2025-03-08 23:11:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 23:11:53,642 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:53,642 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:53,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:53,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 23:11:53,843 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:53,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2082565716, now seen corresponding path program 1 times [2025-03-08 23:11:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056102574] [2025-03-08 23:11:53,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:53,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 23:11:53,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 23:11:53,859 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:53,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:11:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056102574] [2025-03-08 23:11:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056102574] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89429424] [2025-03-08 23:11:53,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:53,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:53,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 23:11:54,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 23:11:54,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 23:11:54,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:54,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:54,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 23:11:54,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:54,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 23:11:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89429424] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:54,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2025-03-08 23:11:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541610805] [2025-03-08 23:11:54,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:54,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 23:11:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:54,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 23:11:54,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-08 23:11:54,155 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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) [2025-03-08 23:11:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:54,221 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2025-03-08 23:11:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:11:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 38 [2025-03-08 23:11:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:54,222 INFO L225 Difference]: With dead ends: 76 [2025-03-08 23:11:54,222 INFO L226 Difference]: Without dead ends: 76 [2025-03-08 23:11:54,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-03-08 23:11:54,222 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 125 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:54,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 281 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-08 23:11:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2025-03-08 23:11:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 71 states have internal predecessors, (76), 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) [2025-03-08 23:11:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2025-03-08 23:11:54,225 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 38 [2025-03-08 23:11:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:54,225 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2025-03-08 23:11:54,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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) [2025-03-08 23:11:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2025-03-08 23:11:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-08 23:11:54,226 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:54,226 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:54,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:54,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:54,427 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:54,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -832130295, now seen corresponding path program 1 times [2025-03-08 23:11:54,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:54,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58878758] [2025-03-08 23:11:54,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:54,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 23:11:54,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 23:11:54,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:54,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58878758] [2025-03-08 23:11:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58878758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390111462] [2025-03-08 23:11:55,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:55,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:55,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 23:11:55,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-08 23:11:55,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-08 23:11:55,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:55,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:55,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-08 23:11:55,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:55,318 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:11:55,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:11:55,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:11:55,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:11:55,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-03-08 23:11:55,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2025-03-08 23:11:55,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:11:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:55,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:55,957 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1073 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1073) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2025-03-08 23:11:56,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:11:56,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2025-03-08 23:11:56,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:11:56,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2025-03-08 23:11:56,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-08 23:11:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390111462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:56,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:56,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 22] total 62 [2025-03-08 23:11:56,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758724876] [2025-03-08 23:11:56,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:56,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-08 23:11:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:56,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-08 23:11:56,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3418, Unknown=42, NotChecked=118, Total=3782 [2025-03-08 23:11:56,364 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 62 states have internal predecessors, (108), 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) [2025-03-08 23:11:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:57,385 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2025-03-08 23:11:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 23:11:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 62 states have internal predecessors, (108), 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 41 [2025-03-08 23:11:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:57,386 INFO L225 Difference]: With dead ends: 78 [2025-03-08 23:11:57,386 INFO L226 Difference]: Without dead ends: 78 [2025-03-08 23:11:57,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=478, Invalid=6290, Unknown=42, NotChecked=162, Total=6972 [2025-03-08 23:11:57,388 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 162 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:57,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1061 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1470 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2025-03-08 23:11:57,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-08 23:11:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2025-03-08 23:11:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 71 states have internal predecessors, (75), 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) [2025-03-08 23:11:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2025-03-08 23:11:57,392 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 41 [2025-03-08 23:11:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:57,393 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2025-03-08 23:11:57,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.7419354838709677) internal successors, (108), 62 states have internal predecessors, (108), 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) [2025-03-08 23:11:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2025-03-08 23:11:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 23:11:57,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:57,393 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:57,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 23:11:57,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:57,594 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:57,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash -957489254, now seen corresponding path program 1 times [2025-03-08 23:11:57,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:57,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678644062] [2025-03-08 23:11:57,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:57,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:57,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:11:57,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:11:57,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:57,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:11:57,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678644062] [2025-03-08 23:11:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678644062] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825164037] [2025-03-08 23:11:57,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:57,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:57,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 23:11:57,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:11:57,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:11:57,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:57,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:57,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 23:11:57,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:11:57,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:11:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825164037] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:11:57,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:11:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2025-03-08 23:11:57,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124413930] [2025-03-08 23:11:57,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:11:57,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 23:11:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:11:57,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 23:11:57,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 23:11:57,849 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2025-03-08 23:11:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:11:57,882 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2025-03-08 23:11:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 23:11:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 44 [2025-03-08 23:11:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:11:57,883 INFO L225 Difference]: With dead ends: 69 [2025-03-08 23:11:57,883 INFO L226 Difference]: Without dead ends: 69 [2025-03-08 23:11:57,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2025-03-08 23:11:57,883 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:11:57,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 204 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:11:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-08 23:11:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2025-03-08 23:11:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 68 states have internal predecessors, (71), 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) [2025-03-08 23:11:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2025-03-08 23:11:57,885 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 44 [2025-03-08 23:11:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:11:57,885 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2025-03-08 23:11:57,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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) [2025-03-08 23:11:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2025-03-08 23:11:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 23:11:57,885 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:11:57,885 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:11:57,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 23:11:58,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:58,090 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:11:58,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:11:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -957489227, now seen corresponding path program 1 times [2025-03-08 23:11:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:11:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658548429] [2025-03-08 23:11:58,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:11:58,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:11:58,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:11:58,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:58,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:11:59,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:11:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658548429] [2025-03-08 23:11:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658548429] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:11:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545992981] [2025-03-08 23:11:59,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:11:59,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:11:59,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:11:59,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:11:59,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 23:11:59,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:11:59,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:11:59,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:11:59,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:11:59,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-03-08 23:11:59,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:11:59,371 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 23:11:59,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 23:11:59,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:11:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:11:59,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2025-03-08 23:11:59,777 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2025-03-08 23:11:59,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2025-03-08 23:11:59,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2025-03-08 23:11:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 23:11:59,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:11:59,908 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1286) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1)) is different from false [2025-03-08 23:11:59,913 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1286) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1)) is different from false [2025-03-08 23:11:59,917 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_1286) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) 1)) is different from false [2025-03-08 23:11:59,921 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int))) (= (select |c_#valid| (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_1286) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1)) is different from false [2025-03-08 23:11:59,931 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int))) (or (= (select |c_#valid| (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1285))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_1286)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) 1) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1285 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1285)))) is different from false [2025-03-08 23:11:59,948 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_45| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|) (not (= v_ArrVal_1285 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_45| (select v_ArrVal_1285 |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|)))) (= (select |c_#valid| (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1285) (select v_ArrVal_1285 .cse0) v_ArrVal_1286) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) 1))) is different from false [2025-03-08 23:11:59,957 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_45| Int)) (or (= (select |c_#valid| (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_#res#1.offset| 4))) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base| v_ArrVal_1285) (select v_ArrVal_1285 .cse0) v_ArrVal_1286) |c_ULTIMATE.start_sll_create_#res#1.base|) .cse0))) 1) (not (= v_ArrVal_1285 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_45| (select v_ArrVal_1285 |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|)))) (< |c_ULTIMATE.start_sll_create_#res#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|))) is different from false [2025-03-08 23:11:59,967 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_45| Int)) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_45| (select v_ArrVal_1285 |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|)) v_ArrVal_1285)) (= (select |c_#valid| (let ((.cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_1285) (select v_ArrVal_1285 .cse0) v_ArrVal_1286) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0))) 1) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|))) is different from false [2025-03-08 23:11:59,977 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1286 (Array Int Int)) (v_ArrVal_1285 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_45| Int)) (or (not (= v_ArrVal_1285 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_45| (select v_ArrVal_1285 |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|)))) (= (select |c_#valid| (let ((.cse0 (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4))) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_1285) (select v_ArrVal_1285 .cse0) v_ArrVal_1286) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse0))) 1) (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_45|))) is different from false [2025-03-08 23:11:59,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2025-03-08 23:11:59,986 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:11:59,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:11:59,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2025-03-08 23:11:59,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2025-03-08 23:11:59,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2025-03-08 23:12:00,332 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-03-08 23:12:00,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2025-03-08 23:12:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2025-03-08 23:12:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545992981] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:00,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 19] total 58 [2025-03-08 23:12:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793569525] [2025-03-08 23:12:00,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:00,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-03-08 23:12:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:00,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-03-08 23:12:00,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2314, Unknown=9, NotChecked=936, Total=3422 [2025-03-08 23:12:00,335 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 59 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 59 states have internal predecessors, (115), 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) [2025-03-08 23:12:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:01,467 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2025-03-08 23:12:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 23:12:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 59 states have internal predecessors, (115), 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 44 [2025-03-08 23:12:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:01,470 INFO L225 Difference]: With dead ends: 74 [2025-03-08 23:12:01,470 INFO L226 Difference]: Without dead ends: 74 [2025-03-08 23:12:01,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=427, Invalid=4570, Unknown=9, NotChecked=1314, Total=6320 [2025-03-08 23:12:01,473 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 193 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:01,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 874 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1503 Invalid, 0 Unknown, 588 Unchecked, 0.5s Time] [2025-03-08 23:12:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-08 23:12:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2025-03-08 23:12:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 67 states have internal predecessors, (70), 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) [2025-03-08 23:12:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2025-03-08 23:12:01,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 44 [2025-03-08 23:12:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:01,474 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2025-03-08 23:12:01,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 59 states have internal predecessors, (115), 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) [2025-03-08 23:12:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2025-03-08 23:12:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 23:12:01,474 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:01,474 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:01,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 23:12:01,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 23:12:01,675 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:01,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -957489226, now seen corresponding path program 1 times [2025-03-08 23:12:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:01,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942826147] [2025-03-08 23:12:01,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:01,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:12:01,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:12:01,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:01,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:12:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942826147] [2025-03-08 23:12:02,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942826147] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404291913] [2025-03-08 23:12:02,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:02,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:02,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 23:12:02,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:12:02,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:12:02,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:02,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:02,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-03-08 23:12:02,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:02,724 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:02,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:02,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:12:02,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 23:12:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:02,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-03-08 23:12:02,982 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2025-03-08 23:12:02,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 65 [2025-03-08 23:12:02,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2025-03-08 23:12:03,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2025-03-08 23:12:03,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2025-03-08 23:12:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:12:03,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:03,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:03,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2025-03-08 23:12:03,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 670 treesize of output 604 [2025-03-08 23:12:03,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 168 [2025-03-08 23:12:03,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2025-03-08 23:12:03,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2025-03-08 23:12:03,529 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1393 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1393) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|)) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1393 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1393)))) is different from false [2025-03-08 23:12:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2025-03-08 23:12:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404291913] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:03,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:03,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 19] total 47 [2025-03-08 23:12:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207122204] [2025-03-08 23:12:03,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:03,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 23:12:03,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:03,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 23:12:03,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2021, Unknown=1, NotChecked=90, Total=2256 [2025-03-08 23:12:03,619 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 48 states have internal predecessors, (110), 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) [2025-03-08 23:12:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:04,386 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2025-03-08 23:12:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 23:12:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 48 states have internal predecessors, (110), 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 44 [2025-03-08 23:12:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:04,387 INFO L225 Difference]: With dead ends: 73 [2025-03-08 23:12:04,387 INFO L226 Difference]: Without dead ends: 73 [2025-03-08 23:12:04,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=290, Invalid=3373, Unknown=1, NotChecked=118, Total=3782 [2025-03-08 23:12:04,388 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:04,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 800 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1022 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2025-03-08 23:12:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2025-03-08 23:12:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2025-03-08 23:12:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.152542372881356) internal successors, (68), 65 states have internal predecessors, (68), 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) [2025-03-08 23:12:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2025-03-08 23:12:04,390 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 44 [2025-03-08 23:12:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:04,390 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2025-03-08 23:12:04,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 48 states have internal predecessors, (110), 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) [2025-03-08 23:12:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2025-03-08 23:12:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 23:12:04,390 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:04,390 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:04,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 23:12:04,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 23:12:04,591 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:04,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash 678184812, now seen corresponding path program 1 times [2025-03-08 23:12:04,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:04,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628327657] [2025-03-08 23:12:04,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:04,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 23:12:04,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 23:12:04,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:04,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:12:04,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:04,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628327657] [2025-03-08 23:12:04,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628327657] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:04,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379957530] [2025-03-08 23:12:04,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:04,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:04,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:04,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 23:12:04,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 23:12:04,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 23:12:04,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:04,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:04,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 23:12:04,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:12:04,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 23:12:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379957530] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:04,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:04,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2025-03-08 23:12:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006318735] [2025-03-08 23:12:04,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:04,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 23:12:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:04,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 23:12:04,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 23:12:04,840 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2025-03-08 23:12:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:04,869 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2025-03-08 23:12:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 23:12:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 47 [2025-03-08 23:12:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:04,870 INFO L225 Difference]: With dead ends: 66 [2025-03-08 23:12:04,870 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 23:12:04,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-08 23:12:04,870 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:04,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:12:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 23:12:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 23:12:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 65 states have internal predecessors, (67), 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) [2025-03-08 23:12:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2025-03-08 23:12:04,873 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 47 [2025-03-08 23:12:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:04,873 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2025-03-08 23:12:04,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2025-03-08 23:12:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2025-03-08 23:12:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 23:12:04,874 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:04,874 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:04,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 23:12:05,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-08 23:12:05,078 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:05,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash 418117309, now seen corresponding path program 1 times [2025-03-08 23:12:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:05,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907587310] [2025-03-08 23:12:05,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:05,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:05,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:12:05,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:12:05,099 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:05,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:12:06,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:06,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907587310] [2025-03-08 23:12:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907587310] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:06,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734326470] [2025-03-08 23:12:06,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:06,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:06,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:06,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 23:12:06,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:12:06,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:12:06,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:06,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:06,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-03-08 23:12:06,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:06,252 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:06,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:06,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 23:12:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:06,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-03-08 23:12:06,716 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2025-03-08 23:12:06,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2025-03-08 23:12:06,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2025-03-08 23:12:06,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2025-03-08 23:12:06,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2025-03-08 23:12:06,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 23:12:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:12:07,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:07,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2025-03-08 23:12:07,319 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1609 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1609) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_sll_update_at_#t~mem10#1.offset|)) (forall ((v_ArrVal_1610 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_#t~mem10#1.base| v_ArrVal_1610) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)))) is different from false [2025-03-08 23:12:07,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:07,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2025-03-08 23:12:07,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2025-03-08 23:12:07,490 WARN L851 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_1607 (Array Int Int))) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1607 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1607)) (not (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1607) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) |c_ULTIMATE.start_main_~s~0#1.base|))))) is different from false [2025-03-08 23:12:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-03-08 23:12:07,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734326470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:07,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:07,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 25] total 73 [2025-03-08 23:12:07,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256228594] [2025-03-08 23:12:07,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:07,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-08 23:12:07,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:07,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-08 23:12:07,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4755, Unknown=20, NotChecked=278, Total=5256 [2025-03-08 23:12:07,802 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 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) [2025-03-08 23:12:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:09,455 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2025-03-08 23:12:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 23:12:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 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 50 [2025-03-08 23:12:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:09,455 INFO L225 Difference]: With dead ends: 68 [2025-03-08 23:12:09,455 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 23:12:09,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=557, Invalid=9733, Unknown=20, NotChecked=402, Total=10712 [2025-03-08 23:12:09,458 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:09,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1110 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2122 Invalid, 0 Unknown, 107 Unchecked, 0.7s Time] [2025-03-08 23:12:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 23:12:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2025-03-08 23:12:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.125) internal successors, (63), 61 states have internal predecessors, (63), 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) [2025-03-08 23:12:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2025-03-08 23:12:09,460 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 50 [2025-03-08 23:12:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:09,460 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2025-03-08 23:12:09,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 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) [2025-03-08 23:12:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2025-03-08 23:12:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 23:12:09,460 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:09,461 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:09,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 23:12:09,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 23:12:09,665 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:09,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash 418191754, now seen corresponding path program 1 times [2025-03-08 23:12:09,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:09,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939165220] [2025-03-08 23:12:09,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:09,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:12:09,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:12:09,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:09,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-08 23:12:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939165220] [2025-03-08 23:12:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939165220] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:12:09,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:12:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:12:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249721507] [2025-03-08 23:12:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:12:09,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:12:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:09,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:12:09,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:12:09,745 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2025-03-08 23:12:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:09,828 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2025-03-08 23:12:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:12:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 50 [2025-03-08 23:12:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:09,829 INFO L225 Difference]: With dead ends: 63 [2025-03-08 23:12:09,829 INFO L226 Difference]: Without dead ends: 63 [2025-03-08 23:12:09,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-08 23:12:09,829 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:09,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:12:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-08 23:12:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2025-03-08 23:12:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 62 states have internal predecessors, (66), 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) [2025-03-08 23:12:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2025-03-08 23:12:09,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 50 [2025-03-08 23:12:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:09,831 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2025-03-08 23:12:09,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2025-03-08 23:12:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2025-03-08 23:12:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 23:12:09,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:09,831 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:09,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-08 23:12:09,831 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:09,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash 418191755, now seen corresponding path program 1 times [2025-03-08 23:12:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:09,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870253166] [2025-03-08 23:12:09,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:09,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:12:09,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:12:09,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:09,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-08 23:12:09,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:09,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870253166] [2025-03-08 23:12:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870253166] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:12:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:12:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:12:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298910501] [2025-03-08 23:12:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:12:09,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:12:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:09,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:12:09,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:12:09,988 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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) [2025-03-08 23:12:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:10,102 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2025-03-08 23:12:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:12:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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 50 [2025-03-08 23:12:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:10,103 INFO L225 Difference]: With dead ends: 65 [2025-03-08 23:12:10,103 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 23:12:10,103 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-08 23:12:10,103 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:10,104 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 142 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:12:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 23:12:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-08 23:12:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 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) [2025-03-08 23:12:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2025-03-08 23:12:10,105 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 50 [2025-03-08 23:12:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:10,105 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2025-03-08 23:12:10,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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) [2025-03-08 23:12:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2025-03-08 23:12:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 23:12:10,105 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:10,105 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:10,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-08 23:12:10,105 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:10,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 79043169, now seen corresponding path program 1 times [2025-03-08 23:12:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446225706] [2025-03-08 23:12:10,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:10,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:10,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 23:12:10,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 23:12:10,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:10,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-08 23:12:10,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:10,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446225706] [2025-03-08 23:12:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446225706] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:12:10,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:12:10,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 23:12:10,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726983664] [2025-03-08 23:12:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:12:10,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:12:10,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:10,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:12:10,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:12:10,187 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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) [2025-03-08 23:12:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:10,272 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2025-03-08 23:12:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:12:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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 51 [2025-03-08 23:12:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:10,273 INFO L225 Difference]: With dead ends: 67 [2025-03-08 23:12:10,273 INFO L226 Difference]: Without dead ends: 67 [2025-03-08 23:12:10,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-08 23:12:10,273 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:10,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:12:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-08 23:12:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2025-03-08 23:12:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1) internal successors, (66), 64 states have internal predecessors, (66), 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) [2025-03-08 23:12:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2025-03-08 23:12:10,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 51 [2025-03-08 23:12:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:10,276 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2025-03-08 23:12:10,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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) [2025-03-08 23:12:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2025-03-08 23:12:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-08 23:12:10,277 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:10,277 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:10,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-08 23:12:10,277 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:10,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1349595257, now seen corresponding path program 1 times [2025-03-08 23:12:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982442332] [2025-03-08 23:12:10,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:10,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-08 23:12:10,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 23:12:10,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:10,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-08 23:12:10,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:10,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982442332] [2025-03-08 23:12:10,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982442332] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:12:10,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:12:10,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:12:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225449189] [2025-03-08 23:12:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:12:10,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:12:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:10,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:12:10,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:12:10,377 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 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) [2025-03-08 23:12:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:10,484 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2025-03-08 23:12:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:12:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 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 53 [2025-03-08 23:12:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:10,485 INFO L225 Difference]: With dead ends: 66 [2025-03-08 23:12:10,485 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 23:12:10,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-08 23:12:10,486 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:10,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:12:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 23:12:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 23:12:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.098360655737705) internal successors, (67), 65 states have internal predecessors, (67), 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) [2025-03-08 23:12:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2025-03-08 23:12:10,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 53 [2025-03-08 23:12:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:10,487 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2025-03-08 23:12:10,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 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) [2025-03-08 23:12:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2025-03-08 23:12:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-08 23:12:10,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:10,488 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:10,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-08 23:12:10,488 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:10,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash -603461981, now seen corresponding path program 1 times [2025-03-08 23:12:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:10,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283865564] [2025-03-08 23:12:10,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:10,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:10,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 23:12:10,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 23:12:10,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:10,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:12:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283865564] [2025-03-08 23:12:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283865564] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031535478] [2025-03-08 23:12:11,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:11,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:11,518 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 23:12:11,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 23:12:11,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 23:12:11,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:11,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:11,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-03-08 23:12:11,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:11,727 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:11,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:11,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:12:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:11,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2025-03-08 23:12:12,057 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:12:12,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2025-03-08 23:12:12,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:12,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2025-03-08 23:12:12,306 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-03-08 23:12:12,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 23:12:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:12:12,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:12,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:12,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2025-03-08 23:12:12,705 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1927))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_1928)) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (not (= (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1927 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1927)))) (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1927))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store .cse3 .cse4 v_ArrVal_1928) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse4)))) (not (= (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_1927 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_1927)))))) is different from false [2025-03-08 23:12:12,738 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse1 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1927) (select v_ArrVal_1927 .cse0) v_ArrVal_1928) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_ULTIMATE.start_main_~s~0#1.base|))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)) v_ArrVal_1927)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|) (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (let ((.cse2 (select v_ArrVal_1927 .cse0))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1927) .cse2 v_ArrVal_1928) |c_ULTIMATE.start_main_~s~0#1.base|) 4) .cse2))) (not (= (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)) v_ArrVal_1927)))))))) is different from false [2025-03-08 23:12:12,759 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_create_#res#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (forall ((v_ArrVal_1927 (Array Int Int))) (or (not (= v_ArrVal_1927 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))) (forall ((v_ArrVal_1928 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_create_#res#1.base| (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base| v_ArrVal_1927) (select v_ArrVal_1927 .cse1) v_ArrVal_1928) |c_ULTIMATE.start_sll_create_#res#1.base|) 4)))))) (< |c_ULTIMATE.start_sll_create_#res#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (forall ((v_ArrVal_1927 (Array Int Int))) (or (not (= v_ArrVal_1927 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))) (forall ((v_ArrVal_1928 (Array Int Int))) (let ((.cse2 (select v_ArrVal_1927 .cse1))) (= .cse2 (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base| v_ArrVal_1927) .cse2 v_ArrVal_1928) |c_ULTIMATE.start_sll_create_#res#1.base|) 4)))))) (< |c_ULTIMATE.start_sll_create_#res#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|))))) is different from false [2025-03-08 23:12:12,780 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse1 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|) (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_1927) (select v_ArrVal_1927 .cse0) v_ArrVal_1928) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4)))) (not (= v_ArrVal_1927 (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|) (forall ((v_ArrVal_1927 (Array Int Int))) (or (forall ((v_ArrVal_1928 (Array Int Int))) (let ((.cse2 (select v_ArrVal_1927 .cse0))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_1927) .cse2 v_ArrVal_1928) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) .cse2))) (not (= v_ArrVal_1927 (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))))))))) is different from false [2025-03-08 23:12:12,805 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|) (forall ((v_ArrVal_1927 (Array Int Int))) (or (not (= v_ArrVal_1927 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))) (forall ((v_ArrVal_1928 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_1927) (select v_ArrVal_1927 .cse1) v_ArrVal_1928) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4)))))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_68| Int)) (or (forall ((v_ArrVal_1927 (Array Int Int))) (or (not (= v_ArrVal_1927 (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68| (select v_ArrVal_1927 |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|)))) (forall ((v_ArrVal_1928 (Array Int Int))) (let ((.cse2 (select v_ArrVal_1927 .cse1))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_1927) .cse2 v_ArrVal_1928) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4) .cse2))))) (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_68|))))) is different from false [2025-03-08 23:12:12,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2025-03-08 23:12:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:12:12,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:12,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2025-03-08 23:12:12,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:12,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2025-03-08 23:12:12,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-03-08 23:12:12,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2025-03-08 23:12:12,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-03-08 23:12:12,836 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:12:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:12:12,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2025-03-08 23:12:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 7 not checked. [2025-03-08 23:12:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031535478] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:12,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:12,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 21] total 61 [2025-03-08 23:12:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385482931] [2025-03-08 23:12:12,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:12,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-08 23:12:12,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:12,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-08 23:12:12,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3025, Unknown=5, NotChecked=570, Total=3782 [2025-03-08 23:12:12,908 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 62 states have internal predecessors, (126), 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) [2025-03-08 23:12:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:14,229 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2025-03-08 23:12:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 23:12:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 62 states have internal predecessors, (126), 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 56 [2025-03-08 23:12:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:14,230 INFO L225 Difference]: With dead ends: 75 [2025-03-08 23:12:14,230 INFO L226 Difference]: Without dead ends: 75 [2025-03-08 23:12:14,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=419, Invalid=6076, Unknown=5, NotChecked=810, Total=7310 [2025-03-08 23:12:14,232 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:14,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 507 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1818 Invalid, 0 Unknown, 348 Unchecked, 0.6s Time] [2025-03-08 23:12:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-08 23:12:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2025-03-08 23:12:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.125) internal successors, (72), 68 states have internal predecessors, (72), 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) [2025-03-08 23:12:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2025-03-08 23:12:14,233 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 56 [2025-03-08 23:12:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:14,233 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2025-03-08 23:12:14,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 62 states have internal predecessors, (126), 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) [2025-03-08 23:12:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2025-03-08 23:12:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-08 23:12:14,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:14,233 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:14,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 23:12:14,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:14,434 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:14,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash -603461980, now seen corresponding path program 1 times [2025-03-08 23:12:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:14,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503605576] [2025-03-08 23:12:14,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:14,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:14,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 23:12:14,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 23:12:14,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:14,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 23:12:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503605576] [2025-03-08 23:12:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503605576] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898551533] [2025-03-08 23:12:15,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:15,439 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:15,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 23:12:15,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-08 23:12:15,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 23:12:15,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:15,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:15,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-08 23:12:15,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:15,608 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 [2025-03-08 23:12:15,716 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:15,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:15,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 23:12:15,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:12:15,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:12:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:15,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-03-08 23:12:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:15,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 23:12:16,133 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:12:16,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2025-03-08 23:12:16,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2025-03-08 23:12:16,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:16,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2025-03-08 23:12:16,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:16,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2025-03-08 23:12:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-08 23:12:16,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:16,914 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse0 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|))) (and (forall ((v_ArrVal_2042 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2042))) (or (forall ((v_ArrVal_2043 (Array Int Int))) (or (not (= (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2043 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2043)) (forall ((v_ArrVal_2045 (Array Int Int)) (v_ArrVal_2044 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2043))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~s~0#1.base|) .cse4))) (<= (+ (select (select (store .cse1 .cse2 v_ArrVal_2045) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store .cse3 .cse2 v_ArrVal_2044) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))))) (< (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) 0) (not (= (store .cse5 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2042 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2042))))) (forall ((v_ArrVal_2042 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2042))) (or (< (select (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) 0) (not (= (store .cse5 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2042 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2042)) (forall ((v_ArrVal_2043 (Array Int Int))) (or (forall ((v_ArrVal_2045 (Array Int Int))) (<= 0 (+ (select (select (store .cse6 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2043) |c_ULTIMATE.start_main_~s~0#1.base|) .cse4) v_ArrVal_2045) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (not (= (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2043 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2043))))))))) is different from false [2025-03-08 23:12:32,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 153 [2025-03-08 23:12:32,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 185 [2025-03-08 23:12:32,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 125 [2025-03-08 23:12:32,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2025-03-08 23:12:32,248 INFO L349 Elim1Store]: treesize reduction 16, result has 60.0 percent of original size [2025-03-08 23:12:32,248 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 137 [2025-03-08 23:12:32,315 INFO L349 Elim1Store]: treesize reduction 32, result has 59.5 percent of original size [2025-03-08 23:12:32,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 163 [2025-03-08 23:12:32,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 91 [2025-03-08 23:12:32,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2025-03-08 23:12:32,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2025-03-08 23:12:32,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2025-03-08 23:12:32,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:32,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 69 [2025-03-08 23:12:32,765 INFO L349 Elim1Store]: treesize reduction 102, result has 19.0 percent of original size [2025-03-08 23:12:32,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 154 [2025-03-08 23:12:32,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:32,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 128 [2025-03-08 23:12:33,891 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 23:12:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-03-08 23:12:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 14 refuted. 1 times theorem prover too weak. 10 trivial. 3 not checked. [2025-03-08 23:12:34,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898551533] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:34,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:34,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 24] total 71 [2025-03-08 23:12:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946730779] [2025-03-08 23:12:34,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:34,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2025-03-08 23:12:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:34,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2025-03-08 23:12:34,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4665, Unknown=54, NotChecked=138, Total=5112 [2025-03-08 23:12:34,129 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 72 states have internal predecessors, (149), 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) [2025-03-08 23:12:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:36,859 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2025-03-08 23:12:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 23:12:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 72 states have internal predecessors, (149), 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 56 [2025-03-08 23:12:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:36,860 INFO L225 Difference]: With dead ends: 77 [2025-03-08 23:12:36,860 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 23:12:36,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=470, Invalid=7312, Unknown=54, NotChecked=174, Total=8010 [2025-03-08 23:12:36,862 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:36,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 626 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1932 Invalid, 0 Unknown, 63 Unchecked, 1.4s Time] [2025-03-08 23:12:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 23:12:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2025-03-08 23:12:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 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) [2025-03-08 23:12:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2025-03-08 23:12:36,864 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 56 [2025-03-08 23:12:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:36,864 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2025-03-08 23:12:36,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 72 states have internal predecessors, (149), 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) [2025-03-08 23:12:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2025-03-08 23:12:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-08 23:12:36,865 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:36,865 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:36,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 23:12:37,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:37,065 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:37,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1527451544, now seen corresponding path program 1 times [2025-03-08 23:12:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892207565] [2025-03-08 23:12:37,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:37,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-08 23:12:37,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 23:12:37,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:37,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:12:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892207565] [2025-03-08 23:12:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892207565] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239620571] [2025-03-08 23:12:38,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:38,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:38,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:38,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 23:12:38,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-08 23:12:38,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-08 23:12:38,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:38,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:38,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-08 23:12:38,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:38,717 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:38,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:38,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:12:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:39,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2025-03-08 23:12:39,252 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:12:39,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2025-03-08 23:12:39,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:39,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2025-03-08 23:12:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-08 23:12:39,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:39,881 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2155 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2155) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0))) is different from false [2025-03-08 23:12:39,997 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2155 (Array Int Int)) (v_ArrVal_2154 (Array Int Int))) (or (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2154))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2155)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2154 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)) v_ArrVal_2154)))) is different from false [2025-03-08 23:12:40,043 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_83| Int) (v_ArrVal_2155 (Array Int Int)) (v_ArrVal_2154 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2154) (select v_ArrVal_2154 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2155) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|) (not (= v_ArrVal_2154 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_83| (select v_ArrVal_2154 |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|)))))) is different from false [2025-03-08 23:12:40,055 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_83| Int) (v_ArrVal_2155 (Array Int Int)) (v_ArrVal_2154 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base| v_ArrVal_2154) (select v_ArrVal_2154 (+ |c_ULTIMATE.start_sll_create_#res#1.offset| 4)) v_ArrVal_2155) |c_ULTIMATE.start_sll_create_#res#1.base|) 4) 0)) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_83| (select v_ArrVal_2154 |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|)) v_ArrVal_2154)) (< |c_ULTIMATE.start_sll_create_#res#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|))) is different from false [2025-03-08 23:12:40,066 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_83| Int) (v_ArrVal_2155 (Array Int Int)) (v_ArrVal_2154 (Array Int Int))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_83| (select v_ArrVal_2154 |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|)) v_ArrVal_2154)) (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2154) (select v_ArrVal_2154 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2155) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 0)))) is different from false [2025-03-08 23:12:40,076 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_83| Int) (v_ArrVal_2155 (Array Int Int)) (v_ArrVal_2154 (Array Int Int))) (or (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2154) (select v_ArrVal_2154 (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4)) v_ArrVal_2155) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4) 0)) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_83| (select v_ArrVal_2154 |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|)) v_ArrVal_2154)) (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_83|))) is different from false [2025-03-08 23:12:40,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2025-03-08 23:12:40,084 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:12:40,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:40,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2025-03-08 23:12:40,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:40,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 33 [2025-03-08 23:12:40,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-08 23:12:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2025-03-08 23:12:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239620571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:40,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 25] total 65 [2025-03-08 23:12:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702395288] [2025-03-08 23:12:40,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:40,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-03-08 23:12:40,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:40,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-03-08 23:12:40,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3155, Unknown=51, NotChecked=714, Total=4160 [2025-03-08 23:12:40,266 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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) [2025-03-08 23:12:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:42,387 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2025-03-08 23:12:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 23:12:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 57 [2025-03-08 23:12:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:42,388 INFO L225 Difference]: With dead ends: 79 [2025-03-08 23:12:42,388 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 23:12:42,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=526, Invalid=6251, Unknown=53, NotChecked=1002, Total=7832 [2025-03-08 23:12:42,389 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:42,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 739 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1666 Invalid, 0 Unknown, 392 Unchecked, 0.9s Time] [2025-03-08 23:12:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 23:12:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2025-03-08 23:12:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 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) [2025-03-08 23:12:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2025-03-08 23:12:42,393 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 57 [2025-03-08 23:12:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:42,393 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2025-03-08 23:12:42,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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) [2025-03-08 23:12:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2025-03-08 23:12:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-08 23:12:42,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:42,393 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:42,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 23:12:42,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:42,594 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:42,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 997212110, now seen corresponding path program 1 times [2025-03-08 23:12:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:42,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605149070] [2025-03-08 23:12:42,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:42,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 23:12:42,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 23:12:42,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:42,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:12:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:44,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605149070] [2025-03-08 23:12:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605149070] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171676311] [2025-03-08 23:12:44,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:12:44,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:44,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:44,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 23:12:44,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 23:12:44,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 23:12:44,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:12:44,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:44,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-08 23:12:44,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:44,834 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:44,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:44,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:12:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:12:45,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-03-08 23:12:45,481 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:12:45,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2025-03-08 23:12:45,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:45,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2025-03-08 23:12:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-08 23:12:45,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:12:46,022 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2265) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2025-03-08 23:12:46,119 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2265) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2025-03-08 23:12:46,244 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int)) (v_ArrVal_2264 (Array Int Int))) (or (not (= v_ArrVal_2264 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| (select v_ArrVal_2264 |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2264))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2265)) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2025-03-08 23:12:46,266 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int)) (v_ArrVal_2264 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (< (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2264) (select v_ArrVal_2264 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2265) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| (select v_ArrVal_2264 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|)) v_ArrVal_2264)))) is different from false [2025-03-08 23:12:46,286 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int)) (v_ArrVal_2264 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| (select v_ArrVal_2264 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|)) v_ArrVal_2264)) (< |c_ULTIMATE.start_sll_create_#res#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (< (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_#res#1.base| v_ArrVal_2264) (select v_ArrVal_2264 (+ |c_ULTIMATE.start_sll_create_#res#1.offset| 4)) v_ArrVal_2265) |c_ULTIMATE.start_sll_create_#res#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2025-03-08 23:12:46,299 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int)) (v_ArrVal_2264 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (not (= v_ArrVal_2264 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| (select v_ArrVal_2264 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (< (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2264) (select v_ArrVal_2264 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2265) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|))) is different from false [2025-03-08 23:12:46,312 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2265 (Array Int Int)) (v_ArrVal_2264 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_90| Int)) (or (< |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|) (< (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2264) (select v_ArrVal_2264 (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4)) v_ArrVal_2265) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 4) |c_#StackHeapBarrier|) (not (= (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_90| (select v_ArrVal_2264 |v_ULTIMATE.start_sll_update_at_~head#1.offset_90|)) v_ArrVal_2264)))) is different from false [2025-03-08 23:12:46,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2025-03-08 23:12:46,321 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-08 23:12:46,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:46,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2025-03-08 23:12:46,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:12:46,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2025-03-08 23:12:46,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2025-03-08 23:12:46,521 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 23:12:46,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2025-03-08 23:12:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2025-03-08 23:12:46,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171676311] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:12:46,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:12:46,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 24] total 67 [2025-03-08 23:12:46,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216758249] [2025-03-08 23:12:46,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:12:46,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-08 23:12:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:12:46,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-08 23:12:46,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3380, Unknown=54, NotChecked=868, Total=4556 [2025-03-08 23:12:46,588 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 68 states, 67 states have (on average 2.08955223880597) internal successors, (140), 68 states have internal predecessors, (140), 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) [2025-03-08 23:12:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:12:49,097 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2025-03-08 23:12:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 23:12:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.08955223880597) internal successors, (140), 68 states have internal predecessors, (140), 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 59 [2025-03-08 23:12:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:12:49,098 INFO L225 Difference]: With dead ends: 78 [2025-03-08 23:12:49,098 INFO L226 Difference]: Without dead ends: 78 [2025-03-08 23:12:49,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=558, Invalid=6725, Unknown=55, NotChecked=1218, Total=8556 [2025-03-08 23:12:49,099 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:12:49,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 773 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2119 Invalid, 0 Unknown, 478 Unchecked, 1.2s Time] [2025-03-08 23:12:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-08 23:12:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2025-03-08 23:12:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 71 states have internal predecessors, (73), 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) [2025-03-08 23:12:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2025-03-08 23:12:49,100 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 59 [2025-03-08 23:12:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:12:49,101 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2025-03-08 23:12:49,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.08955223880597) internal successors, (140), 68 states have internal predecessors, (140), 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) [2025-03-08 23:12:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2025-03-08 23:12:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 23:12:49,101 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:12:49,101 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:12:49,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 23:12:49,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:49,302 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 18 more)] === [2025-03-08 23:12:49,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:12:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash -342835972, now seen corresponding path program 2 times [2025-03-08 23:12:49,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:12:49,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735892852] [2025-03-08 23:12:49,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:12:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:12:49,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-03-08 23:12:49,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 23:12:49,322 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:12:49,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:12:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:12:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735892852] [2025-03-08 23:12:51,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735892852] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:12:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850445958] [2025-03-08 23:12:51,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:12:51,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:12:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:12:51,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:12:51,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 23:12:51,898 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 62 statements into 2 equivalence classes. [2025-03-08 23:12:51,935 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-08 23:12:51,935 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:12:51,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:12:51,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-03-08 23:12:51,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:12:51,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:12:51,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:12:52,104 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:12:52,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 23:12:52,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:12:52,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:12:52,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:12:52,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:12:52,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-08 23:12:52,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-08 23:12:52,712 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2025-03-08 23:12:52,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 36 [2025-03-08 23:12:52,726 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2025-03-08 23:12:52,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2025-03-08 23:12:53,336 INFO L349 Elim1Store]: treesize reduction 116, result has 43.4 percent of original size [2025-03-08 23:12:53,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 162 [2025-03-08 23:12:53,451 INFO L349 Elim1Store]: treesize reduction 108, result has 47.3 percent of original size [2025-03-08 23:12:53,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 129