./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 12:00:26,494 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 12:00:26,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 12:00:26,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 12:00:26,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 12:00:26,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 12:00:26,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 12:00:26,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 12:00:26,600 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 12:00:26,601 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 12:00:26,601 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 12:00:26,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 12:00:26,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 12:00:26,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 12:00:26,602 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 12:00:26,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 12:00:26,603 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 12:00:26,604 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 12:00:26,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 12:00:26,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 12:00:26,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 12:00:26,605 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 -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2025-03-17 12:00:26,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 12:00:27,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 12:00:27,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 12:00:27,016 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 12:00:27,016 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 12:00:27,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2025-03-17 12:00:28,688 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c9552e/cc21679ec41745a38117925eddcfef15/FLAG42f5e56b6 [2025-03-17 12:00:29,072 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 12:00:29,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2025-03-17 12:00:29,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c9552e/cc21679ec41745a38117925eddcfef15/FLAG42f5e56b6 [2025-03-17 12:00:29,304 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766c9552e/cc21679ec41745a38117925eddcfef15 [2025-03-17 12:00:29,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 12:00:29,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 12:00:29,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 12:00:29,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 12:00:29,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 12:00:29,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ef443f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29, skipping insertion in model container [2025-03-17 12:00:29,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,340 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 12:00:29,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:00:29,578 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 12:00:29,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 12:00:29,614 INFO L204 MainTranslator]: Completed translation [2025-03-17 12:00:29,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29 WrapperNode [2025-03-17 12:00:29,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 12:00:29,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 12:00:29,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 12:00:29,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 12:00:29,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,645 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2025-03-17 12:00:29,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 12:00:29,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 12:00:29,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 12:00:29,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 12:00:29,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,666 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,690 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [1, 2]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 12:00:29,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,698 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,702 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 12:00:29,706 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 12:00:29,707 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 12:00:29,707 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 12:00:29,707 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (1/1) ... [2025-03-17 12:00:29,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 12:00:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:29,741 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) [2025-03-17 12:00:29,745 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 [2025-03-17 12:00:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 12:00:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 12:00:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 12:00:29,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 12:00:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 12:00:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 12:00:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 12:00:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 12:00:29,828 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 12:00:29,830 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 12:00:30,050 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#mask~0#1.base, main_~#mask~0#1.offset);havoc main_~#mask~0#1.base, main_~#mask~0#1.offset; [2025-03-17 12:00:30,066 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2025-03-17 12:00:30,067 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 12:00:30,081 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 12:00:30,081 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 12:00:30,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 12:00:30 BoogieIcfgContainer [2025-03-17 12:00:30,082 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 12:00:30,088 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 12:00:30,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 12:00:30,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 12:00:30,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 12:00:29" (1/3) ... [2025-03-17 12:00:30,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283d6f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:00:30, skipping insertion in model container [2025-03-17 12:00:30,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 12:00:29" (2/3) ... [2025-03-17 12:00:30,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283d6f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 12:00:30, skipping insertion in model container [2025-03-17 12:00:30,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 12:00:30" (3/3) ... [2025-03-17 12:00:30,103 INFO L128 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2025-03-17 12:00:30,121 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 12:00:30,123 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysWithLenghtAtDeclaration_-read.c that has 1 procedures, 22 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-03-17 12:00:30,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 12:00:30,154 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;@56a9687, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 12:00:30,154 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 12:00:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-17 12:00:30,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:30,160 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-17 12:00:30,160 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:30,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1784222, now seen corresponding path program 1 times [2025-03-17 12:00:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:30,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785072313] [2025-03-17 12:00:30,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:30,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 12:00:30,304 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 12:00:30,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:30,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:30,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:30,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785072313] [2025-03-17 12:00:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785072313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:30,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:30,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 12:00:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131570300] [2025-03-17 12:00:30,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:30,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:30,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:30,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:30,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:30,568 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:30,708 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2025-03-17 12:00:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:00:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2025-03-17 12:00:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:30,716 INFO L225 Difference]: With dead ends: 42 [2025-03-17 12:00:30,718 INFO L226 Difference]: Without dead ends: 40 [2025-03-17 12:00:30,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:00:30,729 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:30,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-17 12:00:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2025-03-17 12:00:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.6875) internal successors, (27), 23 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) [2025-03-17 12:00:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-17 12:00:30,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2025-03-17 12:00:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:30,786 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-17 12:00:30,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-17 12:00:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-17 12:00:30,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:30,788 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 12:00:30,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 12:00:30,789 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:30,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash 55317848, now seen corresponding path program 1 times [2025-03-17 12:00:30,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:30,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923266929] [2025-03-17 12:00:30,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:30,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:30,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 12:00:30,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 12:00:30,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:30,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923266929] [2025-03-17 12:00:30,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923266929] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:30,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:30,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:00:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19601744] [2025-03-17 12:00:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:30,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:30,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:30,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:30,948 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2025-03-17 12:00:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:31,022 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2025-03-17 12:00:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:00:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 [2025-03-17 12:00:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:31,023 INFO L225 Difference]: With dead ends: 23 [2025-03-17 12:00:31,023 INFO L226 Difference]: Without dead ends: 23 [2025-03-17 12:00:31,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:00:31,024 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:31,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-17 12:00:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-17 12:00:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2025-03-17 12:00:31,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2025-03-17 12:00:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:31,042 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2025-03-17 12:00:31,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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) [2025-03-17 12:00:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2025-03-17 12:00:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-17 12:00:31,045 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:31,045 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 12:00:31,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 12:00:31,045 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:31,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 55317849, now seen corresponding path program 1 times [2025-03-17 12:00:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:31,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879854981] [2025-03-17 12:00:31,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:31,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:31,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 12:00:31,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 12:00:31,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:31,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879854981] [2025-03-17 12:00:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879854981] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:31,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:00:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839583444] [2025-03-17 12:00:31,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:31,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:31,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:31,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:31,327 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2025-03-17 12:00:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:31,435 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2025-03-17 12:00:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:00:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 [2025-03-17 12:00:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:31,436 INFO L225 Difference]: With dead ends: 27 [2025-03-17 12:00:31,436 INFO L226 Difference]: Without dead ends: 27 [2025-03-17 12:00:31,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 12:00:31,436 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:31,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-17 12:00:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-03-17 12:00:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-03-17 12:00:31,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2025-03-17 12:00:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:31,443 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-03-17 12:00:31,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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) [2025-03-17 12:00:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-03-17 12:00:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 12:00:31,443 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:31,443 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:00:31,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 12:00:31,443 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:31,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1293441861, now seen corresponding path program 1 times [2025-03-17 12:00:31,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:31,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018600777] [2025-03-17 12:00:31,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:31,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:00:31,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:00:31,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:31,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:31,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:31,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018600777] [2025-03-17 12:00:31,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018600777] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:31,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624919955] [2025-03-17 12:00:31,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:31,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:31,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:31,598 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) [2025-03-17 12:00:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 12:00:31,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:00:31,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:00:31,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:31,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:31,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 12:00:31,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:31,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624919955] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:31,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-17 12:00:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611055059] [2025-03-17 12:00:31,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:31,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 12:00:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:31,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 12:00:31,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:00:31,820 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:31,940 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-03-17 12:00:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:00:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-17 12:00:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:31,944 INFO L225 Difference]: With dead ends: 30 [2025-03-17 12:00:31,944 INFO L226 Difference]: Without dead ends: 30 [2025-03-17 12:00:31,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2025-03-17 12:00:31,944 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:31,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-17 12:00:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2025-03-17 12:00:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2025-03-17 12:00:31,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2025-03-17 12:00:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:31,952 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2025-03-17 12:00:31,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2025-03-17 12:00:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 12:00:31,952 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:31,952 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-17 12:00:31,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:32,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:32,157 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:32,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1293441636, now seen corresponding path program 1 times [2025-03-17 12:00:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:32,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964674815] [2025-03-17 12:00:32,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:32,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:32,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:00:32,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:00:32,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:32,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:32,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964674815] [2025-03-17 12:00:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964674815] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166456363] [2025-03-17 12:00:32,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:32,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:32,333 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) [2025-03-17 12:00:32,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 12:00:32,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 12:00:32,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 12:00:32,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:32,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:32,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 12:00:32,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:32,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166456363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:32,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:32,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-17 12:00:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821185915] [2025-03-17 12:00:32,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:32,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 12:00:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:32,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 12:00:32,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-03-17 12:00:32,489 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:32,582 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2025-03-17 12:00:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:00:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-17 12:00:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:32,583 INFO L225 Difference]: With dead ends: 35 [2025-03-17 12:00:32,587 INFO L226 Difference]: Without dead ends: 35 [2025-03-17 12:00:32,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:00:32,588 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:32,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-17 12:00:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-17 12:00:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.5) internal successors, (42), 34 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) [2025-03-17 12:00:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-17 12:00:32,595 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 8 [2025-03-17 12:00:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:32,595 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-17 12:00:32,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-17 12:00:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-17 12:00:32,599 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:32,600 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2025-03-17 12:00:32,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 12:00:32,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:32,801 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:32,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1441985060, now seen corresponding path program 1 times [2025-03-17 12:00:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:32,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079346983] [2025-03-17 12:00:32,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:32,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 12:00:32,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 12:00:32,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:32,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079346983] [2025-03-17 12:00:33,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079346983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:33,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037386730] [2025-03-17 12:00:33,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:33,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:33,027 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) [2025-03-17 12:00:33,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 12:00:33,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 12:00:33,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 12:00:33,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:33,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:33,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 12:00:33,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:33,184 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 [2025-03-17 12:00:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:33,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037386730] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:33,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:33,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 12:00:33,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317739355] [2025-03-17 12:00:33,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:33,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 12:00:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:33,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 12:00:33,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-17 12:00:33,426 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2025-03-17 12:00:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:33,574 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2025-03-17 12:00:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 12:00:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 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 9 [2025-03-17 12:00:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:33,575 INFO L225 Difference]: With dead ends: 36 [2025-03-17 12:00:33,575 INFO L226 Difference]: Without dead ends: 36 [2025-03-17 12:00:33,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-03-17 12:00:33,576 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:33,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-17 12:00:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-03-17 12:00:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 35 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) [2025-03-17 12:00:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2025-03-17 12:00:33,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 9 [2025-03-17 12:00:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:33,586 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2025-03-17 12:00:33,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2025-03-17 12:00:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2025-03-17 12:00:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-17 12:00:33,586 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:33,586 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2025-03-17 12:00:33,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 12:00:33,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:33,789 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:33,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash 85932376, now seen corresponding path program 2 times [2025-03-17 12:00:33,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947827321] [2025-03-17 12:00:33,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:33,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-17 12:00:33,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 12 statements. [2025-03-17 12:00:33,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 12:00:33,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:33,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:33,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947827321] [2025-03-17 12:00:33,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947827321] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:33,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:33,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 12:00:33,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88748663] [2025-03-17 12:00:33,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:33,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 12:00:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:33,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 12:00:33,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:00:33,920 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:33,957 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2025-03-17 12:00:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:00:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-17 12:00:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:33,957 INFO L225 Difference]: With dead ends: 34 [2025-03-17 12:00:33,958 INFO L226 Difference]: Without dead ends: 34 [2025-03-17 12:00:33,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 12:00:33,958 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:33,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 12:00:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-17 12:00:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-17 12:00:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 33 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) [2025-03-17 12:00:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-03-17 12:00:33,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2025-03-17 12:00:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:33,960 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-03-17 12:00:33,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-03-17 12:00:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-17 12:00:33,964 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:33,964 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2025-03-17 12:00:33,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 12:00:33,968 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:33,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 85932377, now seen corresponding path program 1 times [2025-03-17 12:00:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751056358] [2025-03-17 12:00:33,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:33,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 12:00:33,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 12:00:33,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:33,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:34,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:34,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751056358] [2025-03-17 12:00:34,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751056358] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:34,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:34,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:00:34,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211101669] [2025-03-17 12:00:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:34,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:34,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:34,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:34,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:34,152 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:34,202 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2025-03-17 12:00:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 12:00:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-17 12:00:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:34,203 INFO L225 Difference]: With dead ends: 57 [2025-03-17 12:00:34,203 INFO L226 Difference]: Without dead ends: 57 [2025-03-17 12:00:34,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:34,203 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:34,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 12:00:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-17 12:00:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2025-03-17 12:00:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2025-03-17 12:00:34,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 12 [2025-03-17 12:00:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:34,211 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2025-03-17 12:00:34,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2025-03-17 12:00:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-17 12:00:34,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:34,212 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:00:34,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 12:00:34,212 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:34,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2052342379, now seen corresponding path program 1 times [2025-03-17 12:00:34,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395316792] [2025-03-17 12:00:34,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:34,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:34,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 12:00:34,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 12:00:34,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:34,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:34,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395316792] [2025-03-17 12:00:34,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395316792] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51570401] [2025-03-17 12:00:34,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:34,375 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) [2025-03-17 12:00:34,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 12:00:34,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 12:00:34,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 12:00:34,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:34,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:34,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 12:00:34,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:34,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:34,605 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 22 treesize of output 18 [2025-03-17 12:00:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51570401] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:34,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:34,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2025-03-17 12:00:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700307699] [2025-03-17 12:00:34,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:34,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:00:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:34,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:00:34,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 12:00:34,744 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2025-03-17 12:00:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:34,820 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2025-03-17 12:00:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:00:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16 [2025-03-17 12:00:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:34,820 INFO L225 Difference]: With dead ends: 59 [2025-03-17 12:00:34,820 INFO L226 Difference]: Without dead ends: 59 [2025-03-17 12:00:34,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:00:34,821 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:34,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 15 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 12:00:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-17 12:00:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-03-17 12:00:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.3) internal successors, (65), 54 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) [2025-03-17 12:00:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2025-03-17 12:00:34,830 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2025-03-17 12:00:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:34,831 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2025-03-17 12:00:34,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2025-03-17 12:00:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2025-03-17 12:00:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-17 12:00:34,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:34,831 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:00:34,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:35,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:35,032 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:35,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash -911039059, now seen corresponding path program 1 times [2025-03-17 12:00:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363258619] [2025-03-17 12:00:35,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:35,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 12:00:35,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 12:00:35,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:35,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:35,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363258619] [2025-03-17 12:00:35,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363258619] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632580337] [2025-03-17 12:00:35,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:35,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:35,142 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) [2025-03-17 12:00:35,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 12:00:35,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 12:00:35,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 12:00:35,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:35,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:35,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 12:00:35,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:35,451 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_16| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_11| Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_11| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16|) 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_16| 1) |v_ULTIMATE.start_main_~#mask~0#1.base_11|) 0))) is different from true [2025-03-17 12:00:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 12:00:35,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:00:35,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632580337] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:35,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 12:00:35,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2025-03-17 12:00:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120281068] [2025-03-17 12:00:35,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:35,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:35,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:35,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:35,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-03-17 12:00:35,453 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:35,491 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2025-03-17 12:00:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:00:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-17 12:00:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:35,492 INFO L225 Difference]: With dead ends: 56 [2025-03-17 12:00:35,492 INFO L226 Difference]: Without dead ends: 55 [2025-03-17 12:00:35,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-03-17 12:00:35,492 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:35,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2025-03-17 12:00:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-17 12:00:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-03-17 12:00:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.28) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2025-03-17 12:00:35,496 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2025-03-17 12:00:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:35,497 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2025-03-17 12:00:35,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2025-03-17 12:00:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-17 12:00:35,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:35,498 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 12:00:35,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:35,702 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,SelfDestructingSolverStorable9 [2025-03-17 12:00:35,702 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:35,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1822562259, now seen corresponding path program 1 times [2025-03-17 12:00:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:35,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796855091] [2025-03-17 12:00:35,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:35,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:35,719 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 12:00:35,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 12:00:35,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:35,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 12:00:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:35,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796855091] [2025-03-17 12:00:35,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796855091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:35,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814900459] [2025-03-17 12:00:35,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:35,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:35,820 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) [2025-03-17 12:00:35,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 12:00:35,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 12:00:35,906 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 12:00:35,906 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:35,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:35,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 12:00:35,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:36,065 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 [2025-03-17 12:00:36,164 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 15 treesize of output 7 [2025-03-17 12:00:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:36,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:36,249 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 14 treesize of output 12 [2025-03-17 12:00:36,258 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 [2025-03-17 12:00:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814900459] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:36,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:36,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2025-03-17 12:00:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071738263] [2025-03-17 12:00:36,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:36,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 12:00:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:36,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 12:00:36,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2025-03-17 12:00:36,427 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:36,773 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2025-03-17 12:00:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 12:00:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 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 19 [2025-03-17 12:00:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:36,774 INFO L225 Difference]: With dead ends: 86 [2025-03-17 12:00:36,774 INFO L226 Difference]: Without dead ends: 86 [2025-03-17 12:00:36,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2025-03-17 12:00:36,774 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:36,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-17 12:00:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2025-03-17 12:00:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 58 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) [2025-03-17 12:00:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2025-03-17 12:00:36,781 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 19 [2025-03-17 12:00:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:36,781 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2025-03-17 12:00:36,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2025-03-17 12:00:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-17 12:00:36,782 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:36,782 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2025-03-17 12:00:36,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:36,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:36,983 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:36,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 996990963, now seen corresponding path program 2 times [2025-03-17 12:00:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:36,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399244236] [2025-03-17 12:00:36,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:36,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 12:00:37,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 12:00:37,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:37,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 12:00:37,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:37,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399244236] [2025-03-17 12:00:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399244236] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:37,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957194335] [2025-03-17 12:00:37,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:37,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:37,209 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) [2025-03-17 12:00:37,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 12:00:37,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 12:00:37,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 12:00:37,289 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:37,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:37,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 12:00:37,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:37,431 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:00:37,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957194335] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:37,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 12:00:37,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2025-03-17 12:00:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217599419] [2025-03-17 12:00:37,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:37,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:00:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:37,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:00:37,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-17 12:00:37,433 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2025-03-17 12:00:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:37,553 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2025-03-17 12:00:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:00:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 20 [2025-03-17 12:00:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:37,554 INFO L225 Difference]: With dead ends: 49 [2025-03-17 12:00:37,554 INFO L226 Difference]: Without dead ends: 49 [2025-03-17 12:00:37,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-03-17 12:00:37,555 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:37,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-17 12:00:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-17 12:00:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2025-03-17 12:00:37,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 20 [2025-03-17 12:00:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:37,564 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2025-03-17 12:00:37,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2025-03-17 12:00:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2025-03-17 12:00:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-17 12:00:37,566 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:37,566 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1] [2025-03-17 12:00:37,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:37,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:37,767 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:37,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:37,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1009761244, now seen corresponding path program 1 times [2025-03-17 12:00:37,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:37,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841413301] [2025-03-17 12:00:37,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:37,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:37,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 12:00:37,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 12:00:37,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:37,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:37,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841413301] [2025-03-17 12:00:37,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841413301] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850878629] [2025-03-17 12:00:37,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:37,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:37,892 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) [2025-03-17 12:00:37,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 12:00:37,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 12:00:37,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 12:00:37,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:37,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:37,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 12:00:37,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:38,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850878629] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:38,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:38,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-17 12:00:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565390782] [2025-03-17 12:00:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:38,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 12:00:38,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:38,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 12:00:38,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2025-03-17 12:00:38,154 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:38,410 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2025-03-17 12:00:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 12:00:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-17 12:00:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:38,415 INFO L225 Difference]: With dead ends: 49 [2025-03-17 12:00:38,415 INFO L226 Difference]: Without dead ends: 49 [2025-03-17 12:00:38,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2025-03-17 12:00:38,415 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:38,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 11 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-17 12:00:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-03-17 12:00:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2025-03-17 12:00:38,418 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 24 [2025-03-17 12:00:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:38,418 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2025-03-17 12:00:38,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2025-03-17 12:00:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-17 12:00:38,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:38,422 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1] [2025-03-17 12:00:38,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:38,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 12:00:38,623 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:38,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -263798663, now seen corresponding path program 2 times [2025-03-17 12:00:38,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:38,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816103183] [2025-03-17 12:00:38,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:38,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:38,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 12:00:38,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 12:00:38,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:38,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816103183] [2025-03-17 12:00:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816103183] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452732570] [2025-03-17 12:00:38,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:38,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:38,902 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) [2025-03-17 12:00:38,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 12:00:38,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 12:00:38,999 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 12:00:38,999 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:38,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:39,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 12:00:39,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:39,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:00:39,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2025-03-17 12:00:39,064 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 0 case distinctions, treesize of input 13 treesize of output 1 [2025-03-17 12:00:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:39,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452732570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:39,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2025-03-17 12:00:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698247829] [2025-03-17 12:00:39,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:39,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 12:00:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:39,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 12:00:39,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-17 12:00:39,435 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:39,559 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2025-03-17 12:00:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:00:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2025-03-17 12:00:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:39,560 INFO L225 Difference]: With dead ends: 119 [2025-03-17 12:00:39,560 INFO L226 Difference]: Without dead ends: 119 [2025-03-17 12:00:39,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:00:39,561 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:39,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-17 12:00:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2025-03-17 12:00:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.2037037037037037) internal successors, (130), 112 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2025-03-17 12:00:39,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 28 [2025-03-17 12:00:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:39,572 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2025-03-17 12:00:39,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2025-03-17 12:00:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-17 12:00:39,572 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:39,572 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 1, 1, 1, 1, 1] [2025-03-17 12:00:39,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 12:00:39,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 12:00:39,774 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:39,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash 31469430, now seen corresponding path program 1 times [2025-03-17 12:00:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922400661] [2025-03-17 12:00:39,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:39,794 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 12:00:39,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 12:00:39,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:39,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 12:00:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922400661] [2025-03-17 12:00:39,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922400661] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681343628] [2025-03-17 12:00:39,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:39,954 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) [2025-03-17 12:00:39,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 12:00:40,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 12:00:40,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 12:00:40,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:40,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:40,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 12:00:40,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 12:00:40,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 12:00:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681343628] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:40,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:40,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2025-03-17 12:00:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550809569] [2025-03-17 12:00:40,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:40,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 12:00:40,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:40,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 12:00:40,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2025-03-17 12:00:40,226 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:40,384 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2025-03-17 12:00:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 12:00:40,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2025-03-17 12:00:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:40,385 INFO L225 Difference]: With dead ends: 109 [2025-03-17 12:00:40,385 INFO L226 Difference]: Without dead ends: 109 [2025-03-17 12:00:40,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2025-03-17 12:00:40,386 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:40,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-17 12:00:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2025-03-17 12:00:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 106 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2025-03-17 12:00:40,390 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 32 [2025-03-17 12:00:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:40,391 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2025-03-17 12:00:40,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2025-03-17 12:00:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-17 12:00:40,391 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:40,391 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 12:00:40,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:40,596 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,SelfDestructingSolverStorable14 [2025-03-17 12:00:40,596 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:40,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1301656107, now seen corresponding path program 1 times [2025-03-17 12:00:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-03-17 12:00:40,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:40,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 12:00:40,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 12:00:40,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:40,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-17 12:00:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094030968] [2025-03-17 12:00:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094030968] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860285130] [2025-03-17 12:00:40,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:40,807 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) [2025-03-17 12:00:40,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 12:00:40,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 12:00:40,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 12:00:40,890 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:40,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:40,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 12:00:40,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:41,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:41,203 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 24 treesize of output 20 [2025-03-17 12:00:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860285130] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:41,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:41,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2025-03-17 12:00:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122408895] [2025-03-17 12:00:41,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:41,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 12:00:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:41,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 12:00:41,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-03-17 12:00:41,364 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2025-03-17 12:00:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:41,600 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2025-03-17 12:00:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 12:00:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) Word has length 35 [2025-03-17 12:00:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:41,601 INFO L225 Difference]: With dead ends: 114 [2025-03-17 12:00:41,601 INFO L226 Difference]: Without dead ends: 114 [2025-03-17 12:00:41,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-03-17 12:00:41,606 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:41,606 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-17 12:00:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2025-03-17 12:00:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.161904761904762) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2025-03-17 12:00:41,612 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 35 [2025-03-17 12:00:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:41,612 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2025-03-17 12:00:41,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2025-03-17 12:00:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2025-03-17 12:00:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-17 12:00:41,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:41,613 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 2, 2, 2, 1, 1] [2025-03-17 12:00:41,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:41,813 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,SelfDestructingSolverStorable15 [2025-03-17 12:00:41,814 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:41,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash 270329494, now seen corresponding path program 2 times [2025-03-17 12:00:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427223419] [2025-03-17 12:00:41,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:41,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:41,826 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-17 12:00:41,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 12:00:41,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:41,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 143 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:42,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427223419] [2025-03-17 12:00:42,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427223419] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:42,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785964926] [2025-03-17 12:00:42,058 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:42,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:42,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:42,060 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) [2025-03-17 12:00:42,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 12:00:42,135 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 48 statements into 2 equivalence classes. [2025-03-17 12:00:42,172 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-17 12:00:42,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:42,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:42,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 12:00:42,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 37 proven. 130 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:42,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 37 proven. 130 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 12:00:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785964926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:42,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-03-17 12:00:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976794593] [2025-03-17 12:00:42,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:42,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 12:00:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:42,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 12:00:42,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2025-03-17 12:00:42,572 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2025-03-17 12:00:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:42,899 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2025-03-17 12:00:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 12:00:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) Word has length 48 [2025-03-17 12:00:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:42,901 INFO L225 Difference]: With dead ends: 110 [2025-03-17 12:00:42,901 INFO L226 Difference]: Without dead ends: 110 [2025-03-17 12:00:42,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2025-03-17 12:00:42,902 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:42,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-17 12:00:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2025-03-17 12:00:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2025-03-17 12:00:42,907 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 48 [2025-03-17 12:00:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:42,908 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2025-03-17 12:00:42,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2025-03-17 12:00:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2025-03-17 12:00:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-17 12:00:42,908 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:42,908 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2025-03-17 12:00:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:43,109 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,SelfDestructingSolverStorable16 [2025-03-17 12:00:43,109 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:43,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash 51740629, now seen corresponding path program 2 times [2025-03-17 12:00:43,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:43,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061963166] [2025-03-17 12:00:43,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:43,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:43,123 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 12:00:43,135 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 12:00:43,136 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:43,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 42 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-17 12:00:43,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061963166] [2025-03-17 12:00:43,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061963166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529924380] [2025-03-17 12:00:43,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:43,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:43,275 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) [2025-03-17 12:00:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 12:00:43,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 12:00:43,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 12:00:43,398 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:43,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:43,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 12:00:43,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 42 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-17 12:00:43,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 42 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-17 12:00:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529924380] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:43,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-03-17 12:00:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591500073] [2025-03-17 12:00:43,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:43,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 12:00:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:43,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 12:00:43,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-17 12:00:43,714 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2025-03-17 12:00:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:43,992 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2025-03-17 12:00:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 12:00:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) Word has length 54 [2025-03-17 12:00:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:43,993 INFO L225 Difference]: With dead ends: 110 [2025-03-17 12:00:43,993 INFO L226 Difference]: Without dead ends: 110 [2025-03-17 12:00:43,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2025-03-17 12:00:43,993 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:43,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 16 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-17 12:00:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2025-03-17 12:00:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 107 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2025-03-17 12:00:43,996 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 54 [2025-03-17 12:00:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:43,997 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2025-03-17 12:00:43,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2025-03-17 12:00:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2025-03-17 12:00:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-17 12:00:43,997 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:43,997 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2025-03-17 12:00:44,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:44,198 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,SelfDestructingSolverStorable17 [2025-03-17 12:00:44,198 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:44,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1251926606, now seen corresponding path program 3 times [2025-03-17 12:00:44,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:44,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378133303] [2025-03-17 12:00:44,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:44,228 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 11 equivalence classes. [2025-03-17 12:00:44,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 58 statements. [2025-03-17 12:00:44,240 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 12:00:44,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2025-03-17 12:00:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378133303] [2025-03-17 12:00:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378133303] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:44,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675363242] [2025-03-17 12:00:44,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:44,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:44,452 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) [2025-03-17 12:00:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 12:00:44,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 11 equivalence classes. [2025-03-17 12:00:44,549 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 11 of 58 statements. [2025-03-17 12:00:44,550 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 12:00:44,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:44,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 12:00:44,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:00:44,568 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 0 case distinctions, treesize of input 11 treesize of output 5 [2025-03-17 12:00:44,578 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 10 treesize of output 8 [2025-03-17 12:00:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2025-03-17 12:00:44,857 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 12:00:44,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675363242] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:44,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 12:00:44,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-17 12:00:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349189747] [2025-03-17 12:00:44,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:44,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 12:00:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:44,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 12:00:44,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:00:44,862 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:44,918 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2025-03-17 12:00:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 12:00:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2025-03-17 12:00:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:44,919 INFO L225 Difference]: With dead ends: 106 [2025-03-17 12:00:44,922 INFO L226 Difference]: Without dead ends: 106 [2025-03-17 12:00:44,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2025-03-17 12:00:44,923 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:44,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-17 12:00:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2025-03-17 12:00:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2025-03-17 12:00:44,925 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 58 [2025-03-17 12:00:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:44,925 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2025-03-17 12:00:44,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2025-03-17 12:00:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-17 12:00:44,925 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:44,925 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2025-03-17 12:00:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:45,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:45,131 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:45,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1350428310, now seen corresponding path program 2 times [2025-03-17 12:00:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:45,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046148917] [2025-03-17 12:00:45,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:45,139 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 61 statements into 2 equivalence classes. [2025-03-17 12:00:45,142 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 4 of 61 statements. [2025-03-17 12:00:45,142 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 12:00:45,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2025-03-17 12:00:45,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046148917] [2025-03-17 12:00:45,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046148917] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 12:00:45,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 12:00:45,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 12:00:45,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792334516] [2025-03-17 12:00:45,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 12:00:45,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 12:00:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:45,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 12:00:45,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:45,186 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2025-03-17 12:00:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:45,195 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-17 12:00:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 12:00:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 61 [2025-03-17 12:00:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:45,196 INFO L225 Difference]: With dead ends: 82 [2025-03-17 12:00:45,196 INFO L226 Difference]: Without dead ends: 71 [2025-03-17 12:00:45,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 12:00:45,198 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:45,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 12:00:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-17 12:00:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-03-17 12:00:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0434782608695652) 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) [2025-03-17 12:00:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2025-03-17 12:00:45,202 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 61 [2025-03-17 12:00:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:45,202 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2025-03-17 12:00:45,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2025-03-17 12:00:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2025-03-17 12:00:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-17 12:00:45,202 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:45,202 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 4, 3, 3, 3, 1, 1] [2025-03-17 12:00:45,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 12:00:45,203 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:45,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 81857363, now seen corresponding path program 3 times [2025-03-17 12:00:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:45,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109776338] [2025-03-17 12:00:45,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:45,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 11 equivalence classes. [2025-03-17 12:00:45,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 68 statements. [2025-03-17 12:00:45,222 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 12:00:45,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-03-17 12:00:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109776338] [2025-03-17 12:00:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109776338] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432736412] [2025-03-17 12:00:45,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:45,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:45,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:45,298 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) [2025-03-17 12:00:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 12:00:45,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 11 equivalence classes. [2025-03-17 12:00:45,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 68 statements. [2025-03-17 12:00:45,375 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 12:00:45,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:45,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 12:00:45,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:45,389 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 0 case distinctions, treesize of input 11 treesize of output 5 [2025-03-17 12:00:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 12:00:45,396 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 0 case distinctions, treesize of input 6 treesize of output 1 [2025-03-17 12:00:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-03-17 12:00:45,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-03-17 12:00:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432736412] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:46,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 12:00:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636115459] [2025-03-17 12:00:46,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:46,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 12:00:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:46,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 12:00:46,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-17 12:00:46,041 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:46,117 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2025-03-17 12:00:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 12:00:46,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2025-03-17 12:00:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:46,118 INFO L225 Difference]: With dead ends: 70 [2025-03-17 12:00:46,118 INFO L226 Difference]: Without dead ends: 70 [2025-03-17 12:00:46,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2025-03-17 12:00:46,119 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:46,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 12:00:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-17 12:00:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-17 12:00:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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) [2025-03-17 12:00:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2025-03-17 12:00:46,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2025-03-17 12:00:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:46,120 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2025-03-17 12:00:46,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2025-03-17 12:00:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-17 12:00:46,121 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:46,121 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 4, 3, 3, 3, 1, 1] [2025-03-17 12:00:46,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:46,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:46,323 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:46,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1757389051, now seen corresponding path program 1 times [2025-03-17 12:00:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72869588] [2025-03-17 12:00:46,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:46,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-17 12:00:46,361 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-17 12:00:46,361 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:46,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2025-03-17 12:00:46,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72869588] [2025-03-17 12:00:46,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72869588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790100288] [2025-03-17 12:00:46,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 12:00:46,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:46,639 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) [2025-03-17 12:00:46,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 12:00:46,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-17 12:00:46,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-17 12:00:46,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:46,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:46,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 12:00:46,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:46,733 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 0 case distinctions, treesize of input 13 treesize of output 1 [2025-03-17 12:00:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2025-03-17 12:00:46,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2025-03-17 12:00:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790100288] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:47,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-17 12:00:47,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997832078] [2025-03-17 12:00:47,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:47,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 12:00:47,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:47,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 12:00:47,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-17 12:00:47,224 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 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) [2025-03-17 12:00:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:47,455 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2025-03-17 12:00:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 12:00:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 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) Word has length 69 [2025-03-17 12:00:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:47,457 INFO L225 Difference]: With dead ends: 94 [2025-03-17 12:00:47,457 INFO L226 Difference]: Without dead ends: 94 [2025-03-17 12:00:47,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2025-03-17 12:00:47,458 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:47,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-03-17 12:00:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2025-03-17 12:00:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.086021505376344) internal successors, (101), 93 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2025-03-17 12:00:47,461 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 69 [2025-03-17 12:00:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:47,461 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2025-03-17 12:00:47,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 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) [2025-03-17 12:00:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2025-03-17 12:00:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-17 12:00:47,461 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:47,461 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 4, 3, 3, 3, 1, 1] [2025-03-17 12:00:47,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:47,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-17 12:00:47,662 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:47,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash 606359447, now seen corresponding path program 2 times [2025-03-17 12:00:47,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:47,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542822072] [2025-03-17 12:00:47,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:47,672 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-17 12:00:47,685 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-17 12:00:47,685 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:47,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 191 proven. 576 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-17 12:00:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542822072] [2025-03-17 12:00:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542822072] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416392544] [2025-03-17 12:00:47,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:47,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:47,999 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) [2025-03-17 12:00:48,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 12:00:48,081 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-17 12:00:48,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-17 12:00:48,114 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:48,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:48,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 12:00:48,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 373 proven. 344 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2025-03-17 12:00:48,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 373 proven. 344 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2025-03-17 12:00:48,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416392544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:48,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:48,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 24 [2025-03-17 12:00:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239177116] [2025-03-17 12:00:48,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:48,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 12:00:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:48,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 12:00:48,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2025-03-17 12:00:48,400 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:48,660 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2025-03-17 12:00:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 12:00:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 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 93 [2025-03-17 12:00:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:48,661 INFO L225 Difference]: With dead ends: 120 [2025-03-17 12:00:48,661 INFO L226 Difference]: Without dead ends: 120 [2025-03-17 12:00:48,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 168 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2025-03-17 12:00:48,662 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:48,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 15 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-17 12:00:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2025-03-17 12:00:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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) [2025-03-17 12:00:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2025-03-17 12:00:48,664 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 93 [2025-03-17 12:00:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:48,664 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2025-03-17 12:00:48,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 24 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2025-03-17 12:00:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-17 12:00:48,667 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:48,667 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 5, 4, 4, 4, 1, 1] [2025-03-17 12:00:48,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:48,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:48,871 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:48,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash -619824646, now seen corresponding path program 3 times [2025-03-17 12:00:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:48,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748675761] [2025-03-17 12:00:48,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:48,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:48,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 113 statements into 15 equivalence classes. [2025-03-17 12:00:48,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 73 of 113 statements. [2025-03-17 12:00:48,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-17 12:00:48,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 197 proven. 651 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2025-03-17 12:00:49,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748675761] [2025-03-17 12:00:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748675761] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592479069] [2025-03-17 12:00:49,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:00:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:49,234 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) [2025-03-17 12:00:49,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 12:00:49,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 113 statements into 15 equivalence classes. [2025-03-17 12:00:49,338 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 73 of 113 statements. [2025-03-17 12:00:49,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-17 12:00:49,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:49,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 12:00:49,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 256 proven. 708 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2025-03-17 12:00:49,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 78 proven. 886 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2025-03-17 12:00:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592479069] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:50,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:50,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2025-03-17 12:00:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595614467] [2025-03-17 12:00:50,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:50,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-17 12:00:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:50,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-17 12:00:50,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2025-03-17 12:00:50,023 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:50,476 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2025-03-17 12:00:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 12:00:50,476 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 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 113 [2025-03-17 12:00:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:50,477 INFO L225 Difference]: With dead ends: 144 [2025-03-17 12:00:50,478 INFO L226 Difference]: Without dead ends: 144 [2025-03-17 12:00:50,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=650, Invalid=2656, Unknown=0, NotChecked=0, Total=3306 [2025-03-17 12:00:50,479 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 126 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:50,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 7 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:00:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-17 12:00:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2025-03-17 12:00:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 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) [2025-03-17 12:00:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2025-03-17 12:00:50,483 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 113 [2025-03-17 12:00:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:50,483 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2025-03-17 12:00:50,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2093023255813953) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2025-03-17 12:00:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-17 12:00:50,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:50,484 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 5, 4, 4, 4, 1, 1] [2025-03-17 12:00:50,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 12:00:50,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:50,684 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:50,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1449329661, now seen corresponding path program 4 times [2025-03-17 12:00:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561906580] [2025-03-17 12:00:50,685 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:00:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:50,701 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 117 statements into 2 equivalence classes. [2025-03-17 12:00:50,742 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-17 12:00:50,742 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:00:50,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 296 proven. 912 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-17 12:00:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561906580] [2025-03-17 12:00:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561906580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679519798] [2025-03-17 12:00:51,003 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:00:51,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:51,004 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:00:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 12:00:51,076 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 117 statements into 2 equivalence classes. [2025-03-17 12:00:51,143 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 117 of 117 statements. [2025-03-17 12:00:51,143 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:00:51,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:51,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 12:00:51,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 238 proven. 972 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-03-17 12:00:51,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 238 proven. 972 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-03-17 12:00:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679519798] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:51,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2025-03-17 12:00:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267678406] [2025-03-17 12:00:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:51,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-17 12:00:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:51,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-17 12:00:51,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 12:00:51,639 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 36 states, 36 states have (on average 4.694444444444445) internal successors, (169), 35 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:52,699 INFO L93 Difference]: Finished difference Result 446 states and 480 transitions. [2025-03-17 12:00:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-03-17 12:00:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.694444444444445) internal successors, (169), 35 states have internal predecessors, (169), 0 states have call successors, (0), 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 117 [2025-03-17 12:00:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:52,700 INFO L225 Difference]: With dead ends: 446 [2025-03-17 12:00:52,700 INFO L226 Difference]: Without dead ends: 446 [2025-03-17 12:00:52,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 206 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2687, Invalid=7015, Unknown=0, NotChecked=0, Total=9702 [2025-03-17 12:00:52,706 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:52,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:00:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-17 12:00:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 398. [2025-03-17 12:00:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.0856423173803527) internal successors, (431), 397 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 431 transitions. [2025-03-17 12:00:52,732 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 431 transitions. Word has length 117 [2025-03-17 12:00:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:52,733 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 431 transitions. [2025-03-17 12:00:52,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.694444444444445) internal successors, (169), 35 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 431 transitions. [2025-03-17 12:00:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-03-17 12:00:52,734 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:52,734 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 10, 9, 9, 9, 1, 1] [2025-03-17 12:00:52,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 12:00:52,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:52,937 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:52,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -307535892, now seen corresponding path program 5 times [2025-03-17 12:00:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129394270] [2025-03-17 12:00:52,939 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:00:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:52,979 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 29 equivalence classes. [2025-03-17 12:00:53,043 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 52 of 217 statements. [2025-03-17 12:00:53,043 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-17 12:00:53,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 2136 proven. 114 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2025-03-17 12:00:53,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:53,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129394270] [2025-03-17 12:00:53,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129394270] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:53,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031604114] [2025-03-17 12:00:53,203 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:00:53,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:53,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:53,205 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:00:53,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 12:00:53,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 29 equivalence classes. [2025-03-17 12:00:53,391 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 52 of 217 statements. [2025-03-17 12:00:53,391 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-17 12:00:53,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:53,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 12:00:53,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 2136 proven. 114 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2025-03-17 12:00:53,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 2149 proven. 101 refuted. 0 times theorem prover too weak. 2224 trivial. 0 not checked. [2025-03-17 12:00:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031604114] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:53,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2025-03-17 12:00:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417006906] [2025-03-17 12:00:53,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:53,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 12:00:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:53,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 12:00:53,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2025-03-17 12:00:53,909 INFO L87 Difference]: Start difference. First operand 398 states and 431 transitions. Second operand has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:54,285 INFO L93 Difference]: Finished difference Result 298 states and 319 transitions. [2025-03-17 12:00:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 12:00:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 0 states have call successors, (0), 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 217 [2025-03-17 12:00:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:54,290 INFO L225 Difference]: With dead ends: 298 [2025-03-17 12:00:54,290 INFO L226 Difference]: Without dead ends: 298 [2025-03-17 12:00:54,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2025-03-17 12:00:54,291 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:54,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-03-17 12:00:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2025-03-17 12:00:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0740740740740742) internal successors, (319), 297 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 319 transitions. [2025-03-17 12:00:54,311 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 319 transitions. Word has length 217 [2025-03-17 12:00:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:54,312 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 319 transitions. [2025-03-17 12:00:54,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 31 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 319 transitions. [2025-03-17 12:00:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2025-03-17 12:00:54,313 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:54,313 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 10, 9, 9, 9, 1, 1] [2025-03-17 12:00:54,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 12:00:54,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-17 12:00:54,514 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:54,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1591952389, now seen corresponding path program 6 times [2025-03-17 12:00:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021305932] [2025-03-17 12:00:54,515 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:00:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:54,550 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 237 statements into 32 equivalence classes. [2025-03-17 12:00:54,713 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 121 of 237 statements. [2025-03-17 12:00:54,713 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-17 12:00:54,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5454 backedges. 19 proven. 2628 refuted. 0 times theorem prover too weak. 2807 trivial. 0 not checked. [2025-03-17 12:00:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:55,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021305932] [2025-03-17 12:00:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021305932] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784812544] [2025-03-17 12:00:55,331 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:00:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:55,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:00:55,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 12:00:55,430 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 237 statements into 32 equivalence classes. [2025-03-17 12:00:55,691 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 121 of 237 statements. [2025-03-17 12:00:55,691 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-17 12:00:55,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:55,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 12:00:55,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5454 backedges. 935 proven. 1847 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2025-03-17 12:00:56,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5454 backedges. 148 proven. 2634 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2025-03-17 12:00:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784812544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:56,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:56,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 47 [2025-03-17 12:00:56,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857805910] [2025-03-17 12:00:56,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:56,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-17 12:00:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:56,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-17 12:00:56,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2025-03-17 12:00:56,764 INFO L87 Difference]: Start difference. First operand 298 states and 319 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 47 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:57,441 INFO L93 Difference]: Finished difference Result 446 states and 472 transitions. [2025-03-17 12:00:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 12:00:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 47 states have internal predecessors, (158), 0 states have call successors, (0), 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 237 [2025-03-17 12:00:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:57,443 INFO L225 Difference]: With dead ends: 446 [2025-03-17 12:00:57,443 INFO L226 Difference]: Without dead ends: 446 [2025-03-17 12:00:57,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=896, Invalid=3796, Unknown=0, NotChecked=0, Total=4692 [2025-03-17 12:00:57,444 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:57,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 7 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-17 12:00:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 394. [2025-03-17 12:00:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.0661577608142494) internal successors, (419), 393 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 419 transitions. [2025-03-17 12:00:57,450 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 419 transitions. Word has length 237 [2025-03-17 12:00:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:57,451 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 419 transitions. [2025-03-17 12:00:57,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 47 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 419 transitions. [2025-03-17 12:00:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2025-03-17 12:00:57,455 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:57,455 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 10, 9, 9, 9, 1, 1] [2025-03-17 12:00:57,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:57,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-17 12:00:57,656 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:57,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1922130562, now seen corresponding path program 7 times [2025-03-17 12:00:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782241643] [2025-03-17 12:00:57,656 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 12:00:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:57,680 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 241 statements into 1 equivalence classes. [2025-03-17 12:00:57,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 241 of 241 statements. [2025-03-17 12:00:57,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:57,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 3614 proven. 186 refuted. 0 times theorem prover too weak. 1862 trivial. 0 not checked. [2025-03-17 12:00:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782241643] [2025-03-17 12:00:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782241643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854983691] [2025-03-17 12:00:58,076 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 12:00:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:58,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:00:58,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 12:00:58,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 241 statements into 1 equivalence classes. [2025-03-17 12:00:58,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 241 of 241 statements. [2025-03-17 12:00:58,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:00:58,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:58,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 12:00:58,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:00:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 3088 proven. 363 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2025-03-17 12:00:58,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:00:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 3088 proven. 363 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2025-03-17 12:00:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854983691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:00:58,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:00:58,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 25 [2025-03-17 12:00:58,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771208705] [2025-03-17 12:00:58,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:00:58,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 12:00:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:00:58,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 12:00:58,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2025-03-17 12:00:58,616 INFO L87 Difference]: Start difference. First operand 394 states and 419 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 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) [2025-03-17 12:00:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:00:59,051 INFO L93 Difference]: Finished difference Result 298 states and 313 transitions. [2025-03-17 12:00:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-17 12:00:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 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) Word has length 241 [2025-03-17 12:00:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:00:59,052 INFO L225 Difference]: With dead ends: 298 [2025-03-17 12:00:59,052 INFO L226 Difference]: Without dead ends: 298 [2025-03-17 12:00:59,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 463 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=2033, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 12:00:59,053 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:00:59,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:00:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-03-17 12:00:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2025-03-17 12:00:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.0538720538720538) internal successors, (313), 297 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:00:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 313 transitions. [2025-03-17 12:00:59,058 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 313 transitions. Word has length 241 [2025-03-17 12:00:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:00:59,058 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 313 transitions. [2025-03-17 12:00:59,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 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) [2025-03-17 12:00:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 313 transitions. [2025-03-17 12:00:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2025-03-17 12:00:59,061 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:00:59,061 INFO L218 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 10, 9, 9, 9, 1, 1] [2025-03-17 12:00:59,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-17 12:00:59,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-17 12:00:59,262 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:00:59,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:00:59,262 INFO L85 PathProgramCache]: Analyzing trace with hash -398374774, now seen corresponding path program 8 times [2025-03-17 12:00:59,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:00:59,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067200933] [2025-03-17 12:00:59,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:59,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:00:59,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 257 statements into 2 equivalence classes. [2025-03-17 12:00:59,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 257 of 257 statements. [2025-03-17 12:00:59,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:00:59,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:00:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 3772 proven. 253 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2025-03-17 12:00:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:00:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067200933] [2025-03-17 12:00:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067200933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:00:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432926522] [2025-03-17 12:00:59,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:00:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:00:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:00:59,797 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:00:59,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 12:00:59,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 257 statements into 2 equivalence classes. [2025-03-17 12:01:00,030 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 257 of 257 statements. [2025-03-17 12:01:00,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:01:00,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:00,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 12:01:00,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 4069 proven. 601 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2025-03-17 12:01:00,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 4069 proven. 601 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2025-03-17 12:01:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432926522] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:00,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:00,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 35 [2025-03-17 12:01:00,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257587212] [2025-03-17 12:01:00,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:00,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-17 12:01:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:00,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-17 12:01:00,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 12:01:00,541 INFO L87 Difference]: Start difference. First operand 298 states and 313 transitions. Second operand has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 35 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:01,351 INFO L93 Difference]: Finished difference Result 298 states and 308 transitions. [2025-03-17 12:01:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-17 12:01:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 35 states have internal predecessors, (159), 0 states have call successors, (0), 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 257 [2025-03-17 12:01:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:01,353 INFO L225 Difference]: With dead ends: 298 [2025-03-17 12:01:01,353 INFO L226 Difference]: Without dead ends: 298 [2025-03-17 12:01:01,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 490 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=870, Invalid=3686, Unknown=0, NotChecked=0, Total=4556 [2025-03-17 12:01:01,360 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:01,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 5 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:01:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2025-03-17 12:01:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2025-03-17 12:01:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.037037037037037) internal successors, (308), 297 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 308 transitions. [2025-03-17 12:01:01,366 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 308 transitions. Word has length 257 [2025-03-17 12:01:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:01,366 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 308 transitions. [2025-03-17 12:01:01,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 35 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 308 transitions. [2025-03-17 12:01:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2025-03-17 12:01:01,367 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:01,367 INFO L218 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 10, 9, 9, 9, 1, 1] [2025-03-17 12:01:01,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:01,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:01,567 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:01,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 85603222, now seen corresponding path program 9 times [2025-03-17 12:01:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:01,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521961611] [2025-03-17 12:01:01,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:01:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:01,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 273 statements into 33 equivalence classes. [2025-03-17 12:01:01,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 89 of 273 statements. [2025-03-17 12:01:01,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 12:01:01,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7470 backedges. 0 proven. 2373 refuted. 0 times theorem prover too weak. 5097 trivial. 0 not checked. [2025-03-17 12:01:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521961611] [2025-03-17 12:01:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521961611] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602634116] [2025-03-17 12:01:01,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:01:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:01,887 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:01,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 12:01:02,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 273 statements into 33 equivalence classes. [2025-03-17 12:01:02,078 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 89 of 273 statements. [2025-03-17 12:01:02,078 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 12:01:02,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:02,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 12:01:02,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7470 backedges. 3353 proven. 389 refuted. 0 times theorem prover too weak. 3728 trivial. 0 not checked. [2025-03-17 12:01:02,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7470 backedges. 3353 proven. 389 refuted. 0 times theorem prover too weak. 3728 trivial. 0 not checked. [2025-03-17 12:01:03,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602634116] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:03,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:03,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 23] total 57 [2025-03-17 12:01:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227562610] [2025-03-17 12:01:03,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:03,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-17 12:01:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:03,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-17 12:01:03,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2704, Unknown=0, NotChecked=0, Total=3192 [2025-03-17 12:01:03,109 INFO L87 Difference]: Start difference. First operand 298 states and 308 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:05,024 INFO L93 Difference]: Finished difference Result 537 states and 558 transitions. [2025-03-17 12:01:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-03-17 12:01:05,024 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 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 273 [2025-03-17 12:01:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:05,026 INFO L225 Difference]: With dead ends: 537 [2025-03-17 12:01:05,026 INFO L226 Difference]: Without dead ends: 537 [2025-03-17 12:01:05,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2246, Invalid=9096, Unknown=0, NotChecked=0, Total=11342 [2025-03-17 12:01:05,030 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 296 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:05,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 5 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:01:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2025-03-17 12:01:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 302. [2025-03-17 12:01:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.0398671096345515) internal successors, (313), 301 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 313 transitions. [2025-03-17 12:01:05,043 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 313 transitions. Word has length 273 [2025-03-17 12:01:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:05,043 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 313 transitions. [2025-03-17 12:01:05,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 313 transitions. [2025-03-17 12:01:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2025-03-17 12:01:05,045 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:05,045 INFO L218 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 10, 9, 9, 9, 1, 1] [2025-03-17 12:01:05,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:05,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:05,246 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:05,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1847258840, now seen corresponding path program 10 times [2025-03-17 12:01:05,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:05,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223195097] [2025-03-17 12:01:05,247 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:01:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:05,276 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 297 statements into 2 equivalence classes. [2025-03-17 12:01:05,399 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-03-17 12:01:05,400 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:01:05,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8994 backedges. 6029 proven. 1666 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2025-03-17 12:01:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223195097] [2025-03-17 12:01:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223195097] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602672084] [2025-03-17 12:01:06,239 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:01:06,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:06,241 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:06,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-17 12:01:06,531 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 297 statements into 2 equivalence classes. [2025-03-17 12:01:06,732 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 297 of 297 statements. [2025-03-17 12:01:06,732 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:01:06,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:06,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 12:01:06,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8994 backedges. 6357 proven. 1338 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2025-03-17 12:01:07,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8994 backedges. 6357 proven. 1338 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2025-03-17 12:01:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602672084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:07,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2025-03-17 12:01:07,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761019120] [2025-03-17 12:01:07,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:07,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 12:01:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:07,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 12:01:07,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2025-03-17 12:01:07,515 INFO L87 Difference]: Start difference. First operand 302 states and 313 transitions. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:08,498 INFO L93 Difference]: Finished difference Result 302 states and 306 transitions. [2025-03-17 12:01:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-17 12:01:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 297 [2025-03-17 12:01:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:08,503 INFO L225 Difference]: With dead ends: 302 [2025-03-17 12:01:08,503 INFO L226 Difference]: Without dead ends: 302 [2025-03-17 12:01:08,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 568 SyntacticMatches, 16 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1881, Invalid=4761, Unknown=0, NotChecked=0, Total=6642 [2025-03-17 12:01:08,506 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:08,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 23 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 12:01:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2025-03-17 12:01:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2025-03-17 12:01:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.0166112956810631) internal successors, (306), 301 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 306 transitions. [2025-03-17 12:01:08,514 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 306 transitions. Word has length 297 [2025-03-17 12:01:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:08,517 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 306 transitions. [2025-03-17 12:01:08,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 306 transitions. [2025-03-17 12:01:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2025-03-17 12:01:08,518 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:08,518 INFO L218 NwaCegarLoop]: trace histogram [66, 66, 65, 65, 10, 9, 9, 9, 1, 1] [2025-03-17 12:01:08,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:08,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-17 12:01:08,720 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:08,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1180081707, now seen corresponding path program 11 times [2025-03-17 12:01:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086574081] [2025-03-17 12:01:08,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:01:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:08,744 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 301 statements into 33 equivalence classes. [2025-03-17 12:01:09,372 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) and asserted 301 of 301 statements. [2025-03-17 12:01:09,372 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2025-03-17 12:01:09,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9262 backedges. 1786 proven. 6755 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2025-03-17 12:01:10,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:10,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086574081] [2025-03-17 12:01:10,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086574081] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:10,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895204112] [2025-03-17 12:01:10,631 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:01:10,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:10,633 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:10,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-17 12:01:10,947 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 301 statements into 33 equivalence classes. [2025-03-17 12:01:11,658 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) and asserted 301 of 301 statements. [2025-03-17 12:01:11,659 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2025-03-17 12:01:11,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:11,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-17 12:01:11,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9262 backedges. 1786 proven. 6755 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2025-03-17 12:01:12,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9262 backedges. 1786 proven. 6755 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2025-03-17 12:01:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895204112] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:12,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:12,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2025-03-17 12:01:12,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363230639] [2025-03-17 12:01:12,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:12,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-17 12:01:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:12,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-17 12:01:12,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2025-03-17 12:01:12,879 INFO L87 Difference]: Start difference. First operand 302 states and 306 transitions. Second operand has 49 states, 49 states have (on average 4.224489795918367) internal successors, (207), 49 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:14,407 INFO L93 Difference]: Finished difference Result 442 states and 450 transitions. [2025-03-17 12:01:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2025-03-17 12:01:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.224489795918367) internal successors, (207), 49 states have internal predecessors, (207), 0 states have call successors, (0), 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 301 [2025-03-17 12:01:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:14,416 INFO L225 Difference]: With dead ends: 442 [2025-03-17 12:01:14,416 INFO L226 Difference]: Without dead ends: 442 [2025-03-17 12:01:14,422 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 560 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3014, Invalid=15346, Unknown=0, NotChecked=0, Total=18360 [2025-03-17 12:01:14,424 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:14,424 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:01:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2025-03-17 12:01:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 390. [2025-03-17 12:01:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0205655526992288) internal successors, (397), 389 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 397 transitions. [2025-03-17 12:01:14,437 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 397 transitions. Word has length 301 [2025-03-17 12:01:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:14,437 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 397 transitions. [2025-03-17 12:01:14,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.224489795918367) internal successors, (207), 49 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 397 transitions. [2025-03-17 12:01:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2025-03-17 12:01:14,438 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:14,438 INFO L218 NwaCegarLoop]: trace histogram [75, 75, 74, 74, 11, 10, 10, 10, 1, 1] [2025-03-17 12:01:14,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:14,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2025-03-17 12:01:14,639 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:14,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1973191581, now seen corresponding path program 12 times [2025-03-17 12:01:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543791830] [2025-03-17 12:01:14,640 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:01:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:14,678 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 341 statements into 34 equivalence classes. [2025-03-17 12:01:15,091 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) and asserted 217 of 341 statements. [2025-03-17 12:01:15,095 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2025-03-17 12:01:15,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11966 backedges. 0 proven. 3334 refuted. 0 times theorem prover too weak. 8632 trivial. 0 not checked. [2025-03-17 12:01:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:16,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543791830] [2025-03-17 12:01:16,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543791830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:16,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193077801] [2025-03-17 12:01:16,240 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:01:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:16,246 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-17 12:01:16,503 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 341 statements into 34 equivalence classes. [2025-03-17 12:01:17,035 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) and asserted 217 of 341 statements. [2025-03-17 12:01:17,035 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2025-03-17 12:01:17,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:17,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 12:01:17,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:17,053 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 [2025-03-17 12:01:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11966 backedges. 0 proven. 3334 refuted. 0 times theorem prover too weak. 8632 trivial. 0 not checked. [2025-03-17 12:01:17,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11966 backedges. 0 proven. 3334 refuted. 0 times theorem prover too weak. 8632 trivial. 0 not checked. [2025-03-17 12:01:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193077801] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:19,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2025-03-17 12:01:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543147204] [2025-03-17 12:01:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:19,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-17 12:01:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:19,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-17 12:01:19,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1331, Unknown=0, NotChecked=0, Total=1892 [2025-03-17 12:01:19,508 INFO L87 Difference]: Start difference. First operand 390 states and 397 transitions. Second operand has 44 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:20,257 INFO L93 Difference]: Finished difference Result 446 states and 466 transitions. [2025-03-17 12:01:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 12:01:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 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 341 [2025-03-17 12:01:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:20,259 INFO L225 Difference]: With dead ends: 446 [2025-03-17 12:01:20,261 INFO L226 Difference]: Without dead ends: 446 [2025-03-17 12:01:20,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1367, Invalid=3189, Unknown=0, NotChecked=0, Total=4556 [2025-03-17 12:01:20,262 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:20,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 15 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 12:01:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-17 12:01:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2025-03-17 12:01:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.0476190476190477) internal successors, (462), 441 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 462 transitions. [2025-03-17 12:01:20,270 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 462 transitions. Word has length 341 [2025-03-17 12:01:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:20,270 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 462 transitions. [2025-03-17 12:01:20,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 462 transitions. [2025-03-17 12:01:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2025-03-17 12:01:20,272 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:20,272 INFO L218 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 11, 10, 10, 10, 1, 1] [2025-03-17 12:01:20,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:20,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:20,474 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:20,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash 939115332, now seen corresponding path program 13 times [2025-03-17 12:01:20,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:20,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374749224] [2025-03-17 12:01:20,475 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 12:01:20,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:20,506 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 393 statements into 1 equivalence classes. [2025-03-17 12:01:20,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 393 of 393 statements. [2025-03-17 12:01:20,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:01:20,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16295 backedges. 11526 proven. 1861 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2025-03-17 12:01:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374749224] [2025-03-17 12:01:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374749224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228181902] [2025-03-17 12:01:21,745 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 12:01:21,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:21,747 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:21,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-17 12:01:22,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 393 statements into 1 equivalence classes. [2025-03-17 12:01:22,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 393 of 393 statements. [2025-03-17 12:01:22,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 12:01:22,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:22,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 12:01:22,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16295 backedges. 11526 proven. 1861 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2025-03-17 12:01:22,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16295 backedges. 11526 proven. 1861 refuted. 0 times theorem prover too weak. 2908 trivial. 0 not checked. [2025-03-17 12:01:22,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228181902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:22,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:22,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2025-03-17 12:01:22,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205288582] [2025-03-17 12:01:22,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:22,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 12:01:22,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:22,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 12:01:22,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2025-03-17 12:01:22,946 INFO L87 Difference]: Start difference. First operand 442 states and 462 transitions. Second operand has 32 states, 32 states have (on average 4.84375) internal successors, (155), 31 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:23,878 INFO L93 Difference]: Finished difference Result 402 states and 418 transitions. [2025-03-17 12:01:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-17 12:01:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.84375) internal successors, (155), 31 states have internal predecessors, (155), 0 states have call successors, (0), 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 393 [2025-03-17 12:01:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:23,880 INFO L225 Difference]: With dead ends: 402 [2025-03-17 12:01:23,880 INFO L226 Difference]: Without dead ends: 402 [2025-03-17 12:01:23,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 757 SyntacticMatches, 17 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2106, Invalid=5376, Unknown=0, NotChecked=0, Total=7482 [2025-03-17 12:01:23,881 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:23,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:01:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2025-03-17 12:01:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2025-03-17 12:01:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.0423940149625934) internal successors, (418), 401 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 418 transitions. [2025-03-17 12:01:23,888 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 418 transitions. Word has length 393 [2025-03-17 12:01:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:23,889 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 418 transitions. [2025-03-17 12:01:23,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.84375) internal successors, (155), 31 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 418 transitions. [2025-03-17 12:01:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2025-03-17 12:01:23,893 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:23,893 INFO L218 NwaCegarLoop]: trace histogram [89, 89, 88, 88, 11, 10, 10, 10, 1, 1] [2025-03-17 12:01:23,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:24,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:24,095 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:24,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1213537721, now seen corresponding path program 14 times [2025-03-17 12:01:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530511812] [2025-03-17 12:01:24,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:01:24,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:24,162 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 397 statements into 2 equivalence classes. [2025-03-17 12:01:24,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 397 of 397 statements. [2025-03-17 12:01:24,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:01:24,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16656 backedges. 12488 proven. 2278 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2025-03-17 12:01:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530511812] [2025-03-17 12:01:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530511812] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258111751] [2025-03-17 12:01:25,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 12:01:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:25,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:25,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:25,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-17 12:01:25,719 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 397 statements into 2 equivalence classes. [2025-03-17 12:01:25,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 397 of 397 statements. [2025-03-17 12:01:25,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 12:01:25,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:25,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 12:01:25,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16656 backedges. 12263 proven. 2503 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2025-03-17 12:01:26,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16656 backedges. 12263 proven. 2503 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2025-03-17 12:01:27,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258111751] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:27,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:27,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2025-03-17 12:01:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900790715] [2025-03-17 12:01:27,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:27,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-17 12:01:27,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:27,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-17 12:01:27,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2025-03-17 12:01:27,006 INFO L87 Difference]: Start difference. First operand 402 states and 418 transitions. Second operand has 45 states, 45 states have (on average 4.6) internal successors, (207), 44 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:28,482 INFO L93 Difference]: Finished difference Result 402 states and 416 transitions. [2025-03-17 12:01:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-03-17 12:01:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.6) internal successors, (207), 44 states have internal predecessors, (207), 0 states have call successors, (0), 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 397 [2025-03-17 12:01:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:28,484 INFO L225 Difference]: With dead ends: 402 [2025-03-17 12:01:28,484 INFO L226 Difference]: Without dead ends: 402 [2025-03-17 12:01:28,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 761 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3220, Invalid=8770, Unknown=0, NotChecked=0, Total=11990 [2025-03-17 12:01:28,489 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:28,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 36 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 12:01:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2025-03-17 12:01:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2025-03-17 12:01:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.0374064837905237) internal successors, (416), 401 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 416 transitions. [2025-03-17 12:01:28,498 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 416 transitions. Word has length 397 [2025-03-17 12:01:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:28,498 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 416 transitions. [2025-03-17 12:01:28,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.6) internal successors, (207), 44 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 416 transitions. [2025-03-17 12:01:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2025-03-17 12:01:28,500 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:28,500 INFO L218 NwaCegarLoop]: trace histogram [90, 90, 89, 89, 11, 10, 10, 10, 1, 1] [2025-03-17 12:01:28,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-17 12:01:28,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:28,704 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:28,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1107475914, now seen corresponding path program 15 times [2025-03-17 12:01:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:28,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27123133] [2025-03-17 12:01:28,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:01:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:28,732 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 401 statements into 34 equivalence classes. [2025-03-17 12:01:28,805 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 157 of 401 statements. [2025-03-17 12:01:28,805 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-17 12:01:28,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17021 backedges. 2613 proven. 6964 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2025-03-17 12:01:29,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27123133] [2025-03-17 12:01:29,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27123133] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559411600] [2025-03-17 12:01:29,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 12:01:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:29,544 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:29,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-17 12:01:29,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 401 statements into 34 equivalence classes. [2025-03-17 12:01:30,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 157 of 401 statements. [2025-03-17 12:01:30,059 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-17 12:01:30,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:30,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 12:01:30,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:30,082 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 0 case distinctions, treesize of input 13 treesize of output 1 [2025-03-17 12:01:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17021 backedges. 2613 proven. 6964 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2025-03-17 12:01:31,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17021 backedges. 0 proven. 9577 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2025-03-17 12:01:32,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559411600] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:32,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:32,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-03-17 12:01:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70705432] [2025-03-17 12:01:32,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:32,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-03-17 12:01:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:32,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-03-17 12:01:32,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=2630, Unknown=0, NotChecked=0, Total=3422 [2025-03-17 12:01:32,931 INFO L87 Difference]: Start difference. First operand 402 states and 416 transitions. Second operand has 59 states, 58 states have (on average 3.4655172413793105) internal successors, (201), 58 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:39,621 INFO L93 Difference]: Finished difference Result 710 states and 766 transitions. [2025-03-17 12:01:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2025-03-17 12:01:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.4655172413793105) internal successors, (201), 58 states have internal predecessors, (201), 0 states have call successors, (0), 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 401 [2025-03-17 12:01:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:39,623 INFO L225 Difference]: With dead ends: 710 [2025-03-17 12:01:39,623 INFO L226 Difference]: Without dead ends: 710 [2025-03-17 12:01:39,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14132 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10778, Invalid=28228, Unknown=0, NotChecked=0, Total=39006 [2025-03-17 12:01:39,626 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 672 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:39,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 2 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 12:01:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2025-03-17 12:01:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 606. [2025-03-17 12:01:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.0545454545454545) internal successors, (638), 605 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 638 transitions. [2025-03-17 12:01:39,632 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 638 transitions. Word has length 401 [2025-03-17 12:01:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:39,632 INFO L471 AbstractCegarLoop]: Abstraction has 606 states and 638 transitions. [2025-03-17 12:01:39,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.4655172413793105) internal successors, (201), 58 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 638 transitions. [2025-03-17 12:01:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2025-03-17 12:01:39,634 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:39,635 INFO L218 NwaCegarLoop]: trace histogram [138, 138, 137, 137, 14, 13, 13, 13, 1, 1] [2025-03-17 12:01:39,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:39,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-17 12:01:39,839 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:39,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash -228288161, now seen corresponding path program 16 times [2025-03-17 12:01:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531611163] [2025-03-17 12:01:39,840 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:01:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:39,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 605 statements into 2 equivalence classes. [2025-03-17 12:01:40,028 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 605 of 605 statements. [2025-03-17 12:01:40,029 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:01:40,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39794 backedges. 13211 proven. 23708 refuted. 0 times theorem prover too weak. 2875 trivial. 0 not checked. [2025-03-17 12:01:41,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531611163] [2025-03-17 12:01:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531611163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:41,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506946505] [2025-03-17 12:01:41,555 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 12:01:41,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:41,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:41,556 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:41,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-17 12:01:41,769 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 605 statements into 2 equivalence classes. [2025-03-17 12:01:42,628 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 605 of 605 statements. [2025-03-17 12:01:42,628 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 12:01:42,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:42,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 2245 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 12:01:42,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39794 backedges. 29673 proven. 4192 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2025-03-17 12:01:43,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39794 backedges. 29673 proven. 4192 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2025-03-17 12:01:44,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506946505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:44,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:44,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 26] total 75 [2025-03-17 12:01:44,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033476418] [2025-03-17 12:01:44,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:44,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-03-17 12:01:44,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:44,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-03-17 12:01:44,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=4907, Unknown=0, NotChecked=0, Total=5700 [2025-03-17 12:01:44,075 INFO L87 Difference]: Start difference. First operand 606 states and 638 transitions. Second operand has 76 states, 76 states have (on average 5.065789473684211) internal successors, (385), 75 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:47,669 INFO L93 Difference]: Finished difference Result 672 states and 697 transitions. [2025-03-17 12:01:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2025-03-17 12:01:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 5.065789473684211) internal successors, (385), 75 states have internal predecessors, (385), 0 states have call successors, (0), 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 605 [2025-03-17 12:01:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:47,672 INFO L225 Difference]: With dead ends: 672 [2025-03-17 12:01:47,672 INFO L226 Difference]: Without dead ends: 672 [2025-03-17 12:01:47,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 1159 SyntacticMatches, 12 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16276 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5653, Invalid=42967, Unknown=0, NotChecked=0, Total=48620 [2025-03-17 12:01:47,685 INFO L435 NwaCegarLoop]: 1 mSDtfsCounter, 289 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5669 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 5732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 5669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:47,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 9 Invalid, 5732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 5669 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-17 12:01:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2025-03-17 12:01:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2025-03-17 12:01:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.038863976083707) internal successors, (695), 669 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 695 transitions. [2025-03-17 12:01:47,699 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 695 transitions. Word has length 605 [2025-03-17 12:01:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:47,699 INFO L471 AbstractCegarLoop]: Abstraction has 670 states and 695 transitions. [2025-03-17 12:01:47,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 5.065789473684211) internal successors, (385), 75 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 695 transitions. [2025-03-17 12:01:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2025-03-17 12:01:47,705 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:47,706 INFO L218 NwaCegarLoop]: trace histogram [152, 152, 151, 151, 15, 14, 14, 14, 1, 1] [2025-03-17 12:01:47,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-17 12:01:47,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-17 12:01:47,910 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:47,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1898498656, now seen corresponding path program 17 times [2025-03-17 12:01:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:47,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316106658] [2025-03-17 12:01:47,916 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:01:47,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:47,977 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 665 statements into 55 equivalence classes. [2025-03-17 12:01:48,865 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) and asserted 576 of 665 statements. [2025-03-17 12:01:48,865 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2025-03-17 12:01:48,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48259 backedges. 35820 proven. 6093 refuted. 0 times theorem prover too weak. 6346 trivial. 0 not checked. [2025-03-17 12:01:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:01:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316106658] [2025-03-17 12:01:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316106658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:01:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753018556] [2025-03-17 12:01:50,648 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 12:01:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:01:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:01:50,650 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:01:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-17 12:01:50,919 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 665 statements into 55 equivalence classes. [2025-03-17 12:01:55,264 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) and asserted 576 of 665 statements. [2025-03-17 12:01:55,264 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2025-03-17 12:01:55,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:01:55,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 12:01:55,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:01:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 48259 backedges. 35820 proven. 6093 refuted. 0 times theorem prover too weak. 6346 trivial. 0 not checked. [2025-03-17 12:01:55,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:01:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 48259 backedges. 37169 proven. 4744 refuted. 0 times theorem prover too weak. 6346 trivial. 0 not checked. [2025-03-17 12:01:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753018556] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:01:56,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:01:56,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2025-03-17 12:01:56,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74930346] [2025-03-17 12:01:56,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:01:56,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-17 12:01:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:01:56,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-17 12:01:56,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=2406, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 12:01:56,569 INFO L87 Difference]: Start difference. First operand 670 states and 695 transitions. Second operand has 55 states, 55 states have (on average 4.545454545454546) internal successors, (250), 55 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 12:01:58,919 INFO L93 Difference]: Finished difference Result 670 states and 692 transitions. [2025-03-17 12:01:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2025-03-17 12:01:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.545454545454546) internal successors, (250), 55 states have internal predecessors, (250), 0 states have call successors, (0), 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 665 [2025-03-17 12:01:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 12:01:58,921 INFO L225 Difference]: With dead ends: 670 [2025-03-17 12:01:58,921 INFO L226 Difference]: Without dead ends: 670 [2025-03-17 12:01:58,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1465 GetRequests, 1283 SyntacticMatches, 23 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7596 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6016, Invalid=19744, Unknown=0, NotChecked=0, Total=25760 [2025-03-17 12:01:58,923 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2595 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-17 12:01:58,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 22 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-17 12:01:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2025-03-17 12:01:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 670. [2025-03-17 12:01:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.0343796711509716) internal successors, (692), 669 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 692 transitions. [2025-03-17 12:01:58,928 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 692 transitions. Word has length 665 [2025-03-17 12:01:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 12:01:58,928 INFO L471 AbstractCegarLoop]: Abstraction has 670 states and 692 transitions. [2025-03-17 12:01:58,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.545454545454546) internal successors, (250), 55 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 12:01:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 692 transitions. [2025-03-17 12:01:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2025-03-17 12:01:58,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 12:01:58,931 INFO L218 NwaCegarLoop]: trace histogram [153, 153, 152, 152, 15, 14, 14, 14, 1, 1] [2025-03-17 12:01:58,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-03-17 12:01:59,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-17 12:01:59,131 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2025-03-17 12:01:59,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 12:01:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1444742301, now seen corresponding path program 18 times [2025-03-17 12:01:59,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 12:01:59,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652463492] [2025-03-17 12:01:59,132 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:01:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 12:01:59,170 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 669 statements into 55 equivalence classes. [2025-03-17 12:02:00,178 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) and asserted 593 of 669 statements. [2025-03-17 12:02:00,178 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2025-03-17 12:02:00,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:02:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 48880 backedges. 0 proven. 14198 refuted. 0 times theorem prover too weak. 34682 trivial. 0 not checked. [2025-03-17 12:02:01,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 12:02:01,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652463492] [2025-03-17 12:02:01,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652463492] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 12:02:01,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998284988] [2025-03-17 12:02:01,986 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 12:02:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 12:02:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 12:02:01,988 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 12:02:01,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-17 12:02:02,226 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 669 statements into 55 equivalence classes. [2025-03-17 12:02:04,467 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) and asserted 593 of 669 statements. [2025-03-17 12:02:04,467 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2025-03-17 12:02:04,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 12:02:04,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 2149 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 12:02:04,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 12:02:04,522 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 [2025-03-17 12:02:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48880 backedges. 0 proven. 14198 refuted. 0 times theorem prover too weak. 34682 trivial. 0 not checked. [2025-03-17 12:02:06,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 12:02:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 48880 backedges. 0 proven. 14198 refuted. 0 times theorem prover too weak. 34682 trivial. 0 not checked. [2025-03-17 12:02:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998284988] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 12:02:10,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 12:02:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2025-03-17 12:02:10,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906612610] [2025-03-17 12:02:10,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 12:02:10,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2025-03-17 12:02:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 12:02:10,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2025-03-17 12:02:10,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1824, Invalid=4982, Unknown=0, NotChecked=0, Total=6806 [2025-03-17 12:02:10,169 INFO L87 Difference]: Start difference. First operand 670 states and 692 transitions. Second operand has 83 states, 82 states have (on average 3.9878048780487805) internal successors, (327), 82 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)