./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 29a0de6b7697865a37e60a82150f204059592b57f74fd0ca1d5024446fc510b4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 15:05:32,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 15:05:32,899 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-10 15:05:32,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 15:05:32,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 15:05:32,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 15:05:32,933 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 15:05:32,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 15:05:32,934 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 15:05:32,935 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 15:05:32,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 15:05:32,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 15:05:32,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 15:05:32,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 15:05:32,937 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 15:05:32,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 15:05:32,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 15:05:32,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 15:05:32,940 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 15:05:32,943 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 15:05:32,943 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 15:05:32,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 15:05:32,944 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 15:05:32,944 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 15:05:32,944 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 15:05:32,944 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 15:05:32,945 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 15:05:32,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 15:05:32,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 15:05:32,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 15:05:32,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:05:32,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 15:05:32,946 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 15:05:32,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 15:05:32,947 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29a0de6b7697865a37e60a82150f204059592b57f74fd0ca1d5024446fc510b4 [2024-11-10 15:05:33,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 15:05:33,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 15:05:33,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 15:05:33,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 15:05:33,178 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 15:05:33,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i [2024-11-10 15:05:34,432 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 15:05:34,607 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 15:05:34,607 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-15/cstrncpy_diffterm_alloca.i [2024-11-10 15:05:34,620 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63f327086/b8e484969b2d4193abfc355876195613/FLAG7ccf9399b [2024-11-10 15:05:34,980 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63f327086/b8e484969b2d4193abfc355876195613 [2024-11-10 15:05:34,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 15:05:34,985 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 15:05:34,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 15:05:34,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 15:05:34,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 15:05:34,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:05:34" (1/1) ... [2024-11-10 15:05:34,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ab4b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:34, skipping insertion in model container [2024-11-10 15:05:34,992 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:05:34" (1/1) ... [2024-11-10 15:05:35,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 15:05:35,293 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:05:35,294 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:05:35,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:05:35,305 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 15:05:35,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:05:35,410 INFO L204 MainTranslator]: Completed translation [2024-11-10 15:05:35,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35 WrapperNode [2024-11-10 15:05:35,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 15:05:35,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 15:05:35,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 15:05:35,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 15:05:35,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,450 INFO L138 Inliner]: procedures = 152, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2024-11-10 15:05:35,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 15:05:35,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 15:05:35,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 15:05:35,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 15:05:35,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,464 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,484 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [1, 2]. [2024-11-10 15:05:35,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,491 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 15:05:35,498 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 15:05:35,498 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 15:05:35,498 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 15:05:35,499 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (1/1) ... [2024-11-10 15:05:35,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:05:35,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:35,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 15:05:35,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 15:05:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 15:05:35,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 15:05:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 15:05:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 15:05:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 15:05:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 15:05:35,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 15:05:35,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 15:05:35,660 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 15:05:35,662 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 15:05:35,814 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L391: call ULTIMATE.dealloc(main_#t~malloc213#1.base, main_#t~malloc213#1.offset);havoc main_#t~malloc213#1.base, main_#t~malloc213#1.offset;call ULTIMATE.dealloc(main_#t~malloc214#1.base, main_#t~malloc214#1.offset);havoc main_#t~malloc214#1.base, main_#t~malloc214#1.offset; [2024-11-10 15:05:35,827 INFO L? ?]: Removed 46 outVars from TransFormulas that were not future-live. [2024-11-10 15:05:35,827 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 15:05:35,836 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 15:05:35,837 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 15:05:35,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:05:35 BoogieIcfgContainer [2024-11-10 15:05:35,837 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 15:05:35,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 15:05:35,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 15:05:35,843 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 15:05:35,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:05:34" (1/3) ... [2024-11-10 15:05:35,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56887e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:05:35, skipping insertion in model container [2024-11-10 15:05:35,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:05:35" (2/3) ... [2024-11-10 15:05:35,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56887e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:05:35, skipping insertion in model container [2024-11-10 15:05:35,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:05:35" (3/3) ... [2024-11-10 15:05:35,847 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy_diffterm_alloca.i [2024-11-10 15:05:35,861 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 15:05:35,861 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-10 15:05:35,902 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 15:05:35,908 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;@49df4174, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 15:05:35,909 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-10 15:05:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-10 15:05:35,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:35,916 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 15:05:35,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:35,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2128990940, now seen corresponding path program 1 times [2024-11-10 15:05:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:35,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112283048] [2024-11-10 15:05:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:36,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:36,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112283048] [2024-11-10 15:05:36,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112283048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:36,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:36,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 15:05:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819948572] [2024-11-10 15:05:36,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:36,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 15:05:36,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 15:05:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 15:05:36,181 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:36,235 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-10 15:05:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 15:05:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-10 15:05:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:36,269 INFO L225 Difference]: With dead ends: 30 [2024-11-10 15:05:36,270 INFO L226 Difference]: Without dead ends: 27 [2024-11-10 15:05:36,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 15:05:36,276 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:36,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-10 15:05:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-10 15:05:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-10 15:05:36,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2024-11-10 15:05:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:36,298 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-10 15:05:36,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-10 15:05:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-10 15:05:36,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:36,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 15:05:36,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 15:05:36,299 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:36,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2128990941, now seen corresponding path program 1 times [2024-11-10 15:05:36,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:36,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937639519] [2024-11-10 15:05:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:36,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:36,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937639519] [2024-11-10 15:05:36,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937639519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:36,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:36,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:05:36,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073210963] [2024-11-10 15:05:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:36,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:05:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:05:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:36,557 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:36,574 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-10 15:05:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:05:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-10 15:05:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:36,575 INFO L225 Difference]: With dead ends: 30 [2024-11-10 15:05:36,576 INFO L226 Difference]: Without dead ends: 30 [2024-11-10 15:05:36,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:36,577 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:36,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-10 15:05:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-10 15:05:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-10 15:05:36,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 6 [2024-11-10 15:05:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:36,582 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-10 15:05:36,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-10 15:05:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-10 15:05:36,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:36,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-10 15:05:36,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 15:05:36,583 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:36,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2129020732, now seen corresponding path program 1 times [2024-11-10 15:05:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:36,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606859146] [2024-11-10 15:05:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606859146] [2024-11-10 15:05:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606859146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:05:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095670659] [2024-11-10 15:05:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:36,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:05:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:05:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:05:36,726 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:36,740 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-10 15:05:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:05:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-10 15:05:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:36,741 INFO L225 Difference]: With dead ends: 29 [2024-11-10 15:05:36,741 INFO L226 Difference]: Without dead ends: 29 [2024-11-10 15:05:36,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:05:36,742 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:36,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-10 15:05:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-10 15:05:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-10 15:05:36,749 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 6 [2024-11-10 15:05:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:36,750 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-10 15:05:36,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-10 15:05:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-10 15:05:36,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:36,750 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:36,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 15:05:36,751 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:36,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 533327220, now seen corresponding path program 1 times [2024-11-10 15:05:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063619335] [2024-11-10 15:05:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:36,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063619335] [2024-11-10 15:05:36,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063619335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:36,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:36,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:05:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115783091] [2024-11-10 15:05:36,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:36,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:05:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:05:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:05:36,850 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:36,900 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-10 15:05:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:05:36,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-10 15:05:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:36,902 INFO L225 Difference]: With dead ends: 25 [2024-11-10 15:05:36,902 INFO L226 Difference]: Without dead ends: 25 [2024-11-10 15:05:36,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:05:36,903 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:36,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-10 15:05:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-10 15:05:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.5263157894736843) 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) [2024-11-10 15:05:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-10 15:05:36,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2024-11-10 15:05:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:36,910 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-10 15:05:36,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-10 15:05:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-10 15:05:36,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:36,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:36,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 15:05:36,911 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:36,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash 533327221, now seen corresponding path program 1 times [2024-11-10 15:05:36,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708398272] [2024-11-10 15:05:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:36,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708398272] [2024-11-10 15:05:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708398272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:05:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682793469] [2024-11-10 15:05:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:05:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:05:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,096 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,146 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-10 15:05:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:05:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-10 15:05:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,147 INFO L225 Difference]: With dead ends: 30 [2024-11-10 15:05:37,148 INFO L226 Difference]: Without dead ends: 30 [2024-11-10 15:05:37,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,148 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 116 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-10 15:05:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-10 15:05:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-10 15:05:37,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2024-11-10 15:05:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,156 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-10 15:05:37,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-10 15:05:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-10 15:05:37,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,157 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 15:05:37,158 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -646725374, now seen corresponding path program 1 times [2024-11-10 15:05:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851539949] [2024-11-10 15:05:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851539949] [2024-11-10 15:05:37,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851539949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:05:37,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775124804] [2024-11-10 15:05:37,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:05:37,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:05:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:05:37,257 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,298 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-10 15:05:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:05:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-10 15:05:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,300 INFO L225 Difference]: With dead ends: 29 [2024-11-10 15:05:37,300 INFO L226 Difference]: Without dead ends: 29 [2024-11-10 15:05:37,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:05:37,301 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-10 15:05:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-10 15:05:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-10 15:05:37,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 11 [2024-11-10 15:05:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,303 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-10 15:05:37,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-10 15:05:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-10 15:05:37,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,308 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 15:05:37,308 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -646725373, now seen corresponding path program 1 times [2024-11-10 15:05:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942402442] [2024-11-10 15:05:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942402442] [2024-11-10 15:05:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942402442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:05:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872201731] [2024-11-10 15:05:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:05:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:05:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:05:37,459 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,512 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-10 15:05:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:05:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-10 15:05:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,513 INFO L225 Difference]: With dead ends: 36 [2024-11-10 15:05:37,513 INFO L226 Difference]: Without dead ends: 36 [2024-11-10 15:05:37,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,513 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 88 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-10 15:05:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-10 15:05:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-10 15:05:37,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 11 [2024-11-10 15:05:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,516 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-10 15:05:37,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-10 15:05:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-10 15:05:37,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 15:05:37,517 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1096084962, now seen corresponding path program 1 times [2024-11-10 15:05:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222780303] [2024-11-10 15:05:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222780303] [2024-11-10 15:05:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222780303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:05:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88138873] [2024-11-10 15:05:37,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:05:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:05:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,695 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,744 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-11-10 15:05:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:05:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-10 15:05:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,745 INFO L225 Difference]: With dead ends: 37 [2024-11-10 15:05:37,745 INFO L226 Difference]: Without dead ends: 37 [2024-11-10 15:05:37,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:05:37,745 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-10 15:05:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2024-11-10 15:05:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-10 15:05:37,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 11 [2024-11-10 15:05:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,748 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-10 15:05:37,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-10 15:05:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-10 15:05:37,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,749 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 15:05:37,750 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1264865279, now seen corresponding path program 1 times [2024-11-10 15:05:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367687851] [2024-11-10 15:05:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367687851] [2024-11-10 15:05:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367687851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:05:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695662888] [2024-11-10 15:05:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:05:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:05:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:37,783 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,799 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-10 15:05:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:05:37,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-10 15:05:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,800 INFO L225 Difference]: With dead ends: 28 [2024-11-10 15:05:37,800 INFO L226 Difference]: Without dead ends: 28 [2024-11-10 15:05:37,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:37,801 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-10 15:05:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-10 15:05:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-10 15:05:37,803 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2024-11-10 15:05:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,803 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-10 15:05:37,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-10 15:05:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:05:37,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,804 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 15:05:37,804 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2017344230, now seen corresponding path program 1 times [2024-11-10 15:05:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90068020] [2024-11-10 15:05:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90068020] [2024-11-10 15:05:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90068020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:05:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45398825] [2024-11-10 15:05:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:05:37,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:05:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:05:37,854 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,900 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-10 15:05:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:05:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 15 [2024-11-10 15:05:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,901 INFO L225 Difference]: With dead ends: 29 [2024-11-10 15:05:37,901 INFO L226 Difference]: Without dead ends: 29 [2024-11-10 15:05:37,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:05:37,901 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-10 15:05:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-10 15:05:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-10 15:05:37,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2024-11-10 15:05:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:37,904 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-10 15:05:37,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-10 15:05:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:05:37,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:37,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:37,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 15:05:37,905 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:37,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2017344229, now seen corresponding path program 1 times [2024-11-10 15:05:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961951325] [2024-11-10 15:05:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961951325] [2024-11-10 15:05:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961951325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:37,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 15:05:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394716616] [2024-11-10 15:05:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:37,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:05:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:05:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,966 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:37,997 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-10 15:05:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:05:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 15 [2024-11-10 15:05:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:37,999 INFO L225 Difference]: With dead ends: 39 [2024-11-10 15:05:37,999 INFO L226 Difference]: Without dead ends: 39 [2024-11-10 15:05:37,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:05:37,999 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:37,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-10 15:05:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-10 15:05:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-10 15:05:38,008 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 15 [2024-11-10 15:05:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:38,008 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-10 15:05:38,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-10 15:05:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:05:38,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:38,009 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:38,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 15:05:38,009 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:38,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1888261510, now seen corresponding path program 1 times [2024-11-10 15:05:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:38,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080060974] [2024-11-10 15:05:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:38,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:38,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080060974] [2024-11-10 15:05:38,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080060974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:38,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-10 15:05:38,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665697935] [2024-11-10 15:05:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:38,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 15:05:38,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 15:05:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:05:38,383 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:38,504 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-11-10 15:05:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 15:05:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 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 15 [2024-11-10 15:05:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:38,505 INFO L225 Difference]: With dead ends: 42 [2024-11-10 15:05:38,505 INFO L226 Difference]: Without dead ends: 42 [2024-11-10 15:05:38,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-10 15:05:38,505 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:38,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:05:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-10 15:05:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-10 15:05:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.263157894736842) internal successors, (48), 41 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) [2024-11-10 15:05:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-10 15:05:38,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2024-11-10 15:05:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:38,510 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-10 15:05:38,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-10 15:05:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:05:38,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:38,511 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:38,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 15:05:38,512 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:38,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1888217817, now seen corresponding path program 1 times [2024-11-10 15:05:38,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:38,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126833979] [2024-11-10 15:05:38,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:38,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:38,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126833979] [2024-11-10 15:05:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126833979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:38,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-10 15:05:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630155891] [2024-11-10 15:05:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:38,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 15:05:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 15:05:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:05:38,650 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:38,681 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-10 15:05:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:05:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2024-11-10 15:05:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:38,681 INFO L225 Difference]: With dead ends: 59 [2024-11-10 15:05:38,682 INFO L226 Difference]: Without dead ends: 59 [2024-11-10 15:05:38,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:05:38,682 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:38,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-10 15:05:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-10 15:05:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-11-10 15:05:38,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 15 [2024-11-10 15:05:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:38,685 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-11-10 15:05:38,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-11-10 15:05:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:05:38,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:38,686 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:38,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 15:05:38,686 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:38,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2113346472, now seen corresponding path program 1 times [2024-11-10 15:05:38,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076512430] [2024-11-10 15:05:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:38,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:38,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076512430] [2024-11-10 15:05:38,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076512430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:38,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597030656] [2024-11-10 15:05:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:38,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:05:38,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 15:05:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:38,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 15:05:39,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:39,089 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 14 treesize of output 10 [2024-11-10 15:05:39,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:05:39,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-10 15:05:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:39,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:39,605 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 13 [2024-11-10 15:05:39,610 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 13 treesize of output 9 [2024-11-10 15:05:39,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-10 15:05:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597030656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:39,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-10 15:05:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177007167] [2024-11-10 15:05:39,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:39,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 15:05:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 15:05:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:05:39,635 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:39,843 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2024-11-10 15:05:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 15:05:39,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-10 15:05:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:39,845 INFO L225 Difference]: With dead ends: 65 [2024-11-10 15:05:39,845 INFO L226 Difference]: Without dead ends: 65 [2024-11-10 15:05:39,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-10 15:05:39,846 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:39,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 230 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:05:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-10 15:05:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-10 15:05:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 62 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) [2024-11-10 15:05:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-10 15:05:39,852 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 15 [2024-11-10 15:05:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:39,852 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-10 15:05:39,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-10 15:05:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-10 15:05:39,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:39,853 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:39,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 15:05:40,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 15:05:40,054 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:40,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1089231152, now seen corresponding path program 1 times [2024-11-10 15:05:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78448189] [2024-11-10 15:05:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:40,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:40,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78448189] [2024-11-10 15:05:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78448189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622127896] [2024-11-10 15:05:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:40,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:40,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:40,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:05:40,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 15:05:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:40,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-10 15:05:40,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:05:40,359 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 7 [2024-11-10 15:05:40,362 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 [2024-11-10 15:05:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:40,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:05:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:40,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622127896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:40,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:40,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-10 15:05:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156363760] [2024-11-10 15:05:40,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:40,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 15:05:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 15:05:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-10 15:05:40,790 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:40,948 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-10 15:05:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 15:05:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2024-11-10 15:05:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:40,949 INFO L225 Difference]: With dead ends: 63 [2024-11-10 15:05:40,949 INFO L226 Difference]: Without dead ends: 63 [2024-11-10 15:05:40,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-10 15:05:40,950 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:40,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:05:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-10 15:05:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-10 15:05:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 61 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) [2024-11-10 15:05:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-11-10 15:05:40,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 16 [2024-11-10 15:05:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:40,952 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-11-10 15:05:40,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-11-10 15:05:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-10 15:05:40,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:40,954 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:40,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 15:05:41,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 15:05:41,156 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:41,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 773516235, now seen corresponding path program 1 times [2024-11-10 15:05:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509125792] [2024-11-10 15:05:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:41,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509125792] [2024-11-10 15:05:41,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509125792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:05:41,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:05:41,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:05:41,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501036205] [2024-11-10 15:05:41,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:05:41,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:05:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:05:41,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:41,273 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2024-11-10 15:05:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:41,287 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2024-11-10 15:05:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:05:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 18 [2024-11-10 15:05:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:41,288 INFO L225 Difference]: With dead ends: 61 [2024-11-10 15:05:41,288 INFO L226 Difference]: Without dead ends: 37 [2024-11-10 15:05:41,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:05:41,289 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:41,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:05:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-10 15:05:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-10 15:05:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-10 15:05:41,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 18 [2024-11-10 15:05:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:41,290 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-10 15:05:41,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2024-11-10 15:05:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-10 15:05:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-10 15:05:41,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:41,291 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:41,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 15:05:41,293 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:41,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2012012428, now seen corresponding path program 1 times [2024-11-10 15:05:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374718476] [2024-11-10 15:05:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374718476] [2024-11-10 15:05:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374718476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158649131] [2024-11-10 15:05:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:41,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:05:41,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 15:05:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:41,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-10 15:05:41,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:05:41,933 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 7 [2024-11-10 15:05:41,936 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 [2024-11-10 15:05:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:42,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:05:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158649131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:42,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2024-11-10 15:05:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936470867] [2024-11-10 15:05:42,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:42,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 15:05:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 15:05:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 15:05:42,663 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 34 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 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) [2024-11-10 15:05:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:43,436 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2024-11-10 15:05:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-10 15:05:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 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 18 [2024-11-10 15:05:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:43,438 INFO L225 Difference]: With dead ends: 74 [2024-11-10 15:05:43,438 INFO L226 Difference]: Without dead ends: 74 [2024-11-10 15:05:43,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2024-11-10 15:05:43,439 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:43,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 159 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:05:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-10 15:05:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-11-10 15:05:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-10 15:05:43,443 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2024-11-10 15:05:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:43,444 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-10 15:05:43,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 34 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) [2024-11-10 15:05:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-10 15:05:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:05:43,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:43,444 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:43,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 15:05:43,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:43,645 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:43,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash -743888523, now seen corresponding path program 2 times [2024-11-10 15:05:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:43,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439191789] [2024-11-10 15:05:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:44,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439191789] [2024-11-10 15:05:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439191789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328982996] [2024-11-10 15:05:44,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:05:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:44,101 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) [2024-11-10 15:05:44,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 15:05:44,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:05:44,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:05:44,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-10 15:05:44,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:44,191 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 14 treesize of output 10 [2024-11-10 15:05:44,526 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-10 15:05:44,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-11-10 15:05:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:44,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:44,956 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 29 treesize of output 25 [2024-11-10 15:05:44,961 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 15 treesize of output 11 [2024-11-10 15:05:44,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-10 15:05:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328982996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:44,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2024-11-10 15:05:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582729192] [2024-11-10 15:05:44,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:44,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-10 15:05:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-10 15:05:44,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-11-10 15:05:44,996 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:45,490 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-10 15:05:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:05:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2024-11-10 15:05:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:45,491 INFO L225 Difference]: With dead ends: 73 [2024-11-10 15:05:45,491 INFO L226 Difference]: Without dead ends: 73 [2024-11-10 15:05:45,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2024-11-10 15:05:45,492 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:45,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:05:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-10 15:05:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2024-11-10 15:05:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-11-10 15:05:45,495 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 20 [2024-11-10 15:05:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:45,495 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-11-10 15:05:45,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-11-10 15:05:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-10 15:05:45,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:45,496 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:45,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 15:05:45,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 15:05:45,701 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:45,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:45,701 INFO L85 PathProgramCache]: Analyzing trace with hash 847816230, now seen corresponding path program 1 times [2024-11-10 15:05:45,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:45,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115148298] [2024-11-10 15:05:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115148298] [2024-11-10 15:05:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115148298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906767418] [2024-11-10 15:05:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:46,440 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) [2024-11-10 15:05:46,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 15:05:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:46,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-10 15:05:46,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:05:46,549 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 7 [2024-11-10 15:05:46,551 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 [2024-11-10 15:05:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:47,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:48,443 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:05:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:48,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906767418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:48,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:48,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-10 15:05:48,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291922050] [2024-11-10 15:05:48,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:48,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-10 15:05:48,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:48,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-10 15:05:48,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2024-11-10 15:05:48,497 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 51 states, 50 states have (on average 1.7) internal successors, (85), 51 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) [2024-11-10 15:05:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:50,859 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2024-11-10 15:05:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-10 15:05:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.7) internal successors, (85), 51 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) Word has length 29 [2024-11-10 15:05:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:50,860 INFO L225 Difference]: With dead ends: 108 [2024-11-10 15:05:50,860 INFO L226 Difference]: Without dead ends: 108 [2024-11-10 15:05:50,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=837, Invalid=7905, Unknown=0, NotChecked=0, Total=8742 [2024-11-10 15:05:50,862 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:50,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 187 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:05:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-10 15:05:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2024-11-10 15:05:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 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) [2024-11-10 15:05:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-11-10 15:05:50,866 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 29 [2024-11-10 15:05:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:50,866 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-11-10 15:05:50,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.7) internal successors, (85), 51 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) [2024-11-10 15:05:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-11-10 15:05:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-10 15:05:50,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:50,866 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:50,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 15:05:51,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:51,067 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:51,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1199065868, now seen corresponding path program 2 times [2024-11-10 15:05:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251413110] [2024-11-10 15:05:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:51,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251413110] [2024-11-10 15:05:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251413110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758904900] [2024-11-10 15:05:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:05:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:51,863 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) [2024-11-10 15:05:51,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 15:05:51,937 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:05:51,937 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:05:51,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-10 15:05:51,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:05:51,998 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 7 [2024-11-10 15:05:52,001 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 [2024-11-10 15:05:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:52,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:05:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:05:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758904900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:05:53,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:05:53,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 58 [2024-11-10 15:05:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333794820] [2024-11-10 15:05:53,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:05:53,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-10 15:05:53,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:05:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-10 15:05:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2024-11-10 15:05:53,747 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:05:56,718 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2024-11-10 15:05:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-10 15:05:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-10 15:05:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:05:56,719 INFO L225 Difference]: With dead ends: 165 [2024-11-10 15:05:56,719 INFO L226 Difference]: Without dead ends: 165 [2024-11-10 15:05:56,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1143, Invalid=10629, Unknown=0, NotChecked=0, Total=11772 [2024-11-10 15:05:56,722 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-10 15:05:56,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 251 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-10 15:05:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-10 15:05:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 86. [2024-11-10 15:05:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-11-10 15:05:56,725 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 30 [2024-11-10 15:05:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:05:56,725 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-11-10 15:05:56,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 59 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:05:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-11-10 15:05:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-10 15:05:56,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:05:56,726 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:05:56,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 15:05:56,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:56,927 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:05:56,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:05:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash 65959731, now seen corresponding path program 2 times [2024-11-10 15:05:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:05:56,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311652562] [2024-11-10 15:05:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:05:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:05:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:05:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 3 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:05:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311652562] [2024-11-10 15:05:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311652562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:05:58,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277210740] [2024-11-10 15:05:58,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:05:58,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:05:58,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:05:58,091 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) [2024-11-10 15:05:58,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 15:05:58,175 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:05:58,175 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:05:58,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-10 15:05:58,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:05:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:05:58,214 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 7 [2024-11-10 15:05:58,217 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 [2024-11-10 15:05:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:05:59,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:06:01,410 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:06:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277210740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:06:01,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:06:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 75 [2024-11-10 15:06:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126196101] [2024-11-10 15:06:01,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:06:01,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-10 15:06:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:06:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-10 15:06:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=5074, Unknown=0, NotChecked=0, Total=5700 [2024-11-10 15:06:01,491 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 76 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:06:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:06:06,477 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2024-11-10 15:06:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-10 15:06:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 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 46 [2024-11-10 15:06:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:06:06,478 INFO L225 Difference]: With dead ends: 207 [2024-11-10 15:06:06,478 INFO L226 Difference]: Without dead ends: 207 [2024-11-10 15:06:06,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2629, Invalid=20021, Unknown=0, NotChecked=0, Total=22650 [2024-11-10 15:06:06,487 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-10 15:06:06,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 361 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-10 15:06:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-10 15:06:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 109. [2024-11-10 15:06:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 108 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) [2024-11-10 15:06:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2024-11-10 15:06:06,490 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 46 [2024-11-10 15:06:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:06:06,490 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2024-11-10 15:06:06,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 76 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:06:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2024-11-10 15:06:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-10 15:06:06,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:06:06,491 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:06:06,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 15:06:06,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:06:06,692 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:06:06,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:06:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1186096858, now seen corresponding path program 3 times [2024-11-10 15:06:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:06:06,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624434912] [2024-11-10 15:06:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:06:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:06:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:06:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:08,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:06:08,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624434912] [2024-11-10 15:06:08,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624434912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:06:08,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276075180] [2024-11-10 15:06:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:06:08,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:06:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:06:08,293 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) [2024-11-10 15:06:08,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 15:06:08,549 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-10 15:06:08,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:06:08,556 WARN L253 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-10 15:06:08,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:06:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:06:08,606 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 7 [2024-11-10 15:06:08,613 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 [2024-11-10 15:06:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:10,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:06:13,474 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:06:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:13,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276075180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:06:13,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:06:13,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 96 [2024-11-10 15:06:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019187759] [2024-11-10 15:06:13,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:06:13,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-10 15:06:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:06:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-10 15:06:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=8122, Unknown=0, NotChecked=0, Total=9312 [2024-11-10 15:06:13,573 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 97 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 97 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:06:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:06:24,350 INFO L93 Difference]: Finished difference Result 310 states and 315 transitions. [2024-11-10 15:06:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2024-11-10 15:06:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 97 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-10 15:06:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:06:24,355 INFO L225 Difference]: With dead ends: 310 [2024-11-10 15:06:24,355 INFO L226 Difference]: Without dead ends: 310 [2024-11-10 15:06:24,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11971 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=5703, Invalid=38187, Unknown=0, NotChecked=0, Total=43890 [2024-11-10 15:06:24,359 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:06:24,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 334 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-10 15:06:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-10 15:06:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 140. [2024-11-10 15:06:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:06:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2024-11-10 15:06:24,365 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 53 [2024-11-10 15:06:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:06:24,365 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2024-11-10 15:06:24,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 97 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:06:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2024-11-10 15:06:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-10 15:06:24,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:06:24,366 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:06:24,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 15:06:24,567 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,SelfDestructingSolverStorable21 [2024-11-10 15:06:24,567 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:06:24,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:06:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -704318860, now seen corresponding path program 3 times [2024-11-10 15:06:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:06:24,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937545794] [2024-11-10 15:06:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:06:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:06:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:06:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:06:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937545794] [2024-11-10 15:06:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937545794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:06:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270416899] [2024-11-10 15:06:26,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:06:26,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:06:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:06:26,901 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) [2024-11-10 15:06:26,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 15:06:27,671 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-10 15:06:27,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:06:27,678 WARN L253 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 278 conjuncts are in the unsatisfiable core [2024-11-10 15:06:27,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:06:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:06:27,765 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 7 [2024-11-10 15:06:27,768 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 [2024-11-10 15:06:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:32,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:06:37,212 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:06:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:06:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270416899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:06:37,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:06:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 132 [2024-11-10 15:06:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486748320] [2024-11-10 15:06:37,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:06:37,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-10 15:06:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:06:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-10 15:06:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2515, Invalid=15041, Unknown=0, NotChecked=0, Total=17556 [2024-11-10 15:06:37,458 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 133 states, 132 states have (on average 1.4848484848484849) internal successors, (196), 133 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)