./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 13:11:43,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 13:11:43,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 13:11:43,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 13:11:43,552 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 13:11:43,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 13:11:43,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 13:11:43,599 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 13:11:43,600 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 13:11:43,613 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 13:11:43,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 13:11:43,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 13:11:43,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 13:11:43,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 13:11:43,614 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 13:11:43,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 13:11:43,615 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 13:11:43,615 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 13:11:43,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 13:11:43,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 13:11:43,616 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 13:11:43,622 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 13:11:43,622 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 13:11:43,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 13:11:43,622 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 13:11:43,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 13:11:43,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 13:11:43,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 13:11:43,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:11:43,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 13:11:43,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 13:11:43,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 13:11:43,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 13:11:43,624 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 13:11:43,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 13:11:43,625 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 13:11:43,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 13:11:43,630 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2024-11-12 13:11:43,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 13:11:43,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 13:11:43,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 13:11:43,866 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 13:11:43,866 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 13:11:43,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-11-12 13:11:45,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 13:11:45,637 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 13:11:45,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-11-12 13:11:45,651 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93479dbb6/778e5b067af5406ebcb75a877d2726f3/FLAGd106bf303 [2024-11-12 13:11:45,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93479dbb6/778e5b067af5406ebcb75a877d2726f3 [2024-11-12 13:11:45,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 13:11:45,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 13:11:45,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 13:11:45,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 13:11:45,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 13:11:45,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:11:45" (1/1) ... [2024-11-12 13:11:45,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a290041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:45, skipping insertion in model container [2024-11-12 13:11:45,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:11:45" (1/1) ... [2024-11-12 13:11:45,968 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 13:11:46,441 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 13:11:46,442 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 13:11:46,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:11:46,456 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 13:11:46,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:11:46,519 INFO L204 MainTranslator]: Completed translation [2024-11-12 13:11:46,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46 WrapperNode [2024-11-12 13:11:46,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 13:11:46,521 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 13:11:46,521 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 13:11:46,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 13:11:46,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,556 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2024-11-12 13:11:46,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 13:11:46,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 13:11:46,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 13:11:46,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 13:11:46,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,583 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [1, 3]. 75 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]. [2024-11-12 13:11:46,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,587 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,590 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,592 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 13:11:46,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 13:11:46,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 13:11:46,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 13:11:46,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (1/1) ... [2024-11-12 13:11:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:11:46,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:46,637 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) [2024-11-12 13:11:46,639 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 [2024-11-12 13:11:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 13:11:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 13:11:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 13:11:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 13:11:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 13:11:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 13:11:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 13:11:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 13:11:46,819 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 13:11:46,821 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 13:11:47,066 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-12 13:11:47,066 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 13:11:47,083 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 13:11:47,084 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-12 13:11:47,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:11:47 BoogieIcfgContainer [2024-11-12 13:11:47,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 13:11:47,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 13:11:47,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 13:11:47,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 13:11:47,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:11:45" (1/3) ... [2024-11-12 13:11:47,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccf6b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:11:47, skipping insertion in model container [2024-11-12 13:11:47,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:11:46" (2/3) ... [2024-11-12 13:11:47,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccf6b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:11:47, skipping insertion in model container [2024-11-12 13:11:47,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:11:47" (3/3) ... [2024-11-12 13:11:47,108 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2024-11-12 13:11:47,136 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 13:11:47,137 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-12 13:11:47,183 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 13:11:47,191 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;@57ecf33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 13:11:47,193 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-12 13:11:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-12 13:11:47,206 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,206 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,207 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash 889510841, now seen corresponding path program 1 times [2024-11-12 13:11:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420637606] [2024-11-12 13:11:47,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:47,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420637606] [2024-11-12 13:11:47,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420637606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:47,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:47,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:47,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690207385] [2024-11-12 13:11:47,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:47,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:47,508 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:47,556 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-12 13:11:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-12 13:11:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:47,564 INFO L225 Difference]: With dead ends: 31 [2024-11-12 13:11:47,564 INFO L226 Difference]: Without dead ends: 29 [2024-11-12 13:11:47,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:47,569 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:47,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-12 13:11:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-12 13:11:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.65) internal successors, (33), 28 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) [2024-11-12 13:11:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-12 13:11:47,624 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-12 13:11:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:47,625 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-12 13:11:47,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-12 13:11:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-12 13:11:47,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,625 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 13:11:47,625 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash 889512763, now seen corresponding path program 1 times [2024-11-12 13:11:47,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418469336] [2024-11-12 13:11:47,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418469336] [2024-11-12 13:11:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418469336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:47,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:47,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:11:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498906131] [2024-11-12 13:11:47,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:47,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:11:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:11:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:11:47,692 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. 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) [2024-11-12 13:11:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:47,719 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-12 13:11:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:11:47,720 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 [2024-11-12 13:11:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:47,720 INFO L225 Difference]: With dead ends: 30 [2024-11-12 13:11:47,720 INFO L226 Difference]: Without dead ends: 29 [2024-11-12 13:11:47,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:11:47,722 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:47,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-12 13:11:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-12 13:11:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 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) [2024-11-12 13:11:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-12 13:11:47,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2024-11-12 13:11:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:47,725 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-12 13:11:47,725 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) [2024-11-12 13:11:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-12 13:11:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:11:47,726 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,726 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 13:11:47,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2024-11-12 13:11:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792065736] [2024-11-12 13:11:47,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:47,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:47,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792065736] [2024-11-12 13:11:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792065736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:47,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589356215] [2024-11-12 13:11:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:47,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:47,789 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:47,804 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-12 13:11:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:11:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:47,805 INFO L225 Difference]: With dead ends: 33 [2024-11-12 13:11:47,805 INFO L226 Difference]: Without dead ends: 33 [2024-11-12 13:11:47,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:47,806 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:47,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-12 13:11:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-12 13:11:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 29 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) [2024-11-12 13:11:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-12 13:11:47,809 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 7 [2024-11-12 13:11:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:47,810 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-12 13:11:47,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-12 13:11:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:11:47,810 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,810 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 13:11:47,811 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092650, now seen corresponding path program 1 times [2024-11-12 13:11:47,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170780456] [2024-11-12 13:11:47,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:47,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:47,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170780456] [2024-11-12 13:11:47,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170780456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:47,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:47,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:11:47,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573291604] [2024-11-12 13:11:47,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:47,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:11:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:11:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:11:47,875 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:47,893 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-12 13:11:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:11:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:11:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:47,894 INFO L225 Difference]: With dead ends: 28 [2024-11-12 13:11:47,895 INFO L226 Difference]: Without dead ends: 28 [2024-11-12 13:11:47,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:11:47,896 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:47,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-12 13:11:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-12 13:11:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 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) [2024-11-12 13:11:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-12 13:11:47,902 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2024-11-12 13:11:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:47,902 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-12 13:11:47,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-12 13:11:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:11:47,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,903 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 13:11:47,904 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2024-11-12 13:11:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410930072] [2024-11-12 13:11:47,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:47,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410930072] [2024-11-12 13:11:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410930072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:47,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:47,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847092312] [2024-11-12 13:11:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:47,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:47,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:47,972 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:47,990 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-12 13:11:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:11:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:47,992 INFO L225 Difference]: With dead ends: 33 [2024-11-12 13:11:47,992 INFO L226 Difference]: Without dead ends: 33 [2024-11-12 13:11:47,993 INFO L434 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 [2024-11-12 13:11:47,993 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:47,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-12 13:11:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-12 13:11:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5) internal successors, (33), 28 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) [2024-11-12 13:11:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-12 13:11:47,997 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 7 [2024-11-12 13:11:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:47,997 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-12 13:11:47,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-12 13:11:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:11:47,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:47,998 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:47,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 13:11:47,998 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:47,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1806939693, now seen corresponding path program 1 times [2024-11-12 13:11:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:47,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045415365] [2024-11-12 13:11:47,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045415365] [2024-11-12 13:11:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045415365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:48,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339491538] [2024-11-12 13:11:48,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:11:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:11:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,127 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,172 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-12 13:11:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:11:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:11:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,173 INFO L225 Difference]: With dead ends: 33 [2024-11-12 13:11:48,173 INFO L226 Difference]: Without dead ends: 33 [2024-11-12 13:11:48,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:11:48,174 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 49 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-12 13:11:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-12 13:11:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.5) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-12 13:11:48,177 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 7 [2024-11-12 13:11:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,177 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-12 13:11:48,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-12 13:11:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-12 13:11:48,177 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,177 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 13:11:48,178 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash 121448626, now seen corresponding path program 1 times [2024-11-12 13:11:48,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31650402] [2024-11-12 13:11:48,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31650402] [2024-11-12 13:11:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31650402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:11:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746561176] [2024-11-12 13:11:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:48,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:48,260 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,272 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-12 13:11:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-12 13:11:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,273 INFO L225 Difference]: With dead ends: 35 [2024-11-12 13:11:48,273 INFO L226 Difference]: Without dead ends: 35 [2024-11-12 13:11:48,273 INFO L434 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 [2024-11-12 13:11:48,274 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-12 13:11:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-12 13:11:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 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) [2024-11-12 13:11:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-12 13:11:48,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 8 [2024-11-12 13:11:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,277 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-12 13:11:48,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-12 13:11:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-12 13:11:48,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,278 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 13:11:48,278 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 123295668, now seen corresponding path program 1 times [2024-11-12 13:11:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902163391] [2024-11-12 13:11:48,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902163391] [2024-11-12 13:11:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902163391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567381071] [2024-11-12 13:11:48,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:11:48,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:11:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,361 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,383 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-11-12 13:11:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:11:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-12 13:11:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,384 INFO L225 Difference]: With dead ends: 34 [2024-11-12 13:11:48,384 INFO L226 Difference]: Without dead ends: 34 [2024-11-12 13:11:48,384 INFO L434 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 [2024-11-12 13:11:48,384 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-12 13:11:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-12 13:11:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) 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) [2024-11-12 13:11:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-12 13:11:48,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 8 [2024-11-12 13:11:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,387 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-12 13:11:48,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-12 13:11:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-12 13:11:48,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,388 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 13:11:48,388 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 748011989, now seen corresponding path program 1 times [2024-11-12 13:11:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648231417] [2024-11-12 13:11:48,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648231417] [2024-11-12 13:11:48,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648231417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:11:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685612659] [2024-11-12 13:11:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:48,419 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2024-11-12 13:11:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,441 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-12 13:11:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2024-11-12 13:11:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,441 INFO L225 Difference]: With dead ends: 29 [2024-11-12 13:11:48,442 INFO L226 Difference]: Without dead ends: 29 [2024-11-12 13:11:48,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:48,442 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-12 13:11:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-12 13:11:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-12 13:11:48,444 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2024-11-12 13:11:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,444 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-12 13:11:48,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2024-11-12 13:11:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-12 13:11:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-12 13:11:48,445 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,445 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 13:11:48,445 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash 748011990, now seen corresponding path program 1 times [2024-11-12 13:11:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464730751] [2024-11-12 13:11:48,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464730751] [2024-11-12 13:11:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464730751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:11:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092733710] [2024-11-12 13:11:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:11:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:11:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:11:48,515 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2024-11-12 13:11:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,562 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-12 13:11:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:11:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2024-11-12 13:11:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,563 INFO L225 Difference]: With dead ends: 39 [2024-11-12 13:11:48,563 INFO L226 Difference]: Without dead ends: 39 [2024-11-12 13:11:48,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:11:48,564 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-12 13:11:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2024-11-12 13:11:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) 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) [2024-11-12 13:11:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-12 13:11:48,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2024-11-12 13:11:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,569 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-12 13:11:48,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2024-11-12 13:11:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-12 13:11:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:11:48,569 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,569 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 13:11:48,570 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1713535197, now seen corresponding path program 1 times [2024-11-12 13:11:48,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859375623] [2024-11-12 13:11:48,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859375623] [2024-11-12 13:11:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859375623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:48,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265844643] [2024-11-12 13:11:48,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:11:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:11:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,633 INFO L87 Difference]: Start difference. First operand 30 states and 35 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) [2024-11-12 13:11:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,657 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-12 13:11:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:48,658 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 [2024-11-12 13:11:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,658 INFO L225 Difference]: With dead ends: 29 [2024-11-12 13:11:48,658 INFO L226 Difference]: Without dead ends: 29 [2024-11-12 13:11:48,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,659 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,659 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-12 13:11:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-12 13:11:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-12 13:11:48,660 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2024-11-12 13:11:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,661 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-12 13:11:48,661 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) [2024-11-12 13:11:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-12 13:11:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:11:48,661 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,661 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 13:11:48,665 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1713535198, now seen corresponding path program 1 times [2024-11-12 13:11:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472830190] [2024-11-12 13:11:48,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472830190] [2024-11-12 13:11:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472830190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:11:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376593370] [2024-11-12 13:11:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:11:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:11:48,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,753 INFO L87 Difference]: Start difference. First operand 29 states and 34 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) [2024-11-12 13:11:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,779 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-12 13:11:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:11:48,780 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 [2024-11-12 13:11:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,780 INFO L225 Difference]: With dead ends: 40 [2024-11-12 13:11:48,780 INFO L226 Difference]: Without dead ends: 40 [2024-11-12 13:11:48,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:11:48,781 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-12 13:11:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-12 13:11:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-12 13:11:48,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 11 [2024-11-12 13:11:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,783 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-12 13:11:48,783 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) [2024-11-12 13:11:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-12 13:11:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:11:48,784 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,784 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 13:11:48,784 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1901373728, now seen corresponding path program 1 times [2024-11-12 13:11:48,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400291630] [2024-11-12 13:11:48,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:48,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:48,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400291630] [2024-11-12 13:11:48,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400291630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:48,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:48,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:11:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894218505] [2024-11-12 13:11:48,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:48,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:11:48,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:11:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:11:48,900 INFO L87 Difference]: Start difference. First operand 36 states and 41 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) [2024-11-12 13:11:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:48,927 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-12 13:11:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:11:48,928 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 [2024-11-12 13:11:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:48,928 INFO L225 Difference]: With dead ends: 41 [2024-11-12 13:11:48,928 INFO L226 Difference]: Without dead ends: 41 [2024-11-12 13:11:48,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:11:48,929 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:48,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-12 13:11:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2024-11-12 13:11:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) 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) [2024-11-12 13:11:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-12 13:11:48,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2024-11-12 13:11:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:48,931 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-12 13:11:48,932 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) [2024-11-12 13:11:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-12 13:11:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:11:48,932 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:48,932 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:48,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 13:11:48,933 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:48,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2024-11-12 13:11:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538478308] [2024-11-12 13:11:48,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:49,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538478308] [2024-11-12 13:11:49,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538478308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:49,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032376706] [2024-11-12 13:11:49,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:49,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:49,121 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) [2024-11-12 13:11:49,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 13:11:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:49,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 13:11:49,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:49,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-12 13:11:49,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:11:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:49,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032376706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:49,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-12 13:11:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53661815] [2024-11-12 13:11:49,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:49,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:11:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:11:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:11:49,530 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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) [2024-11-12 13:11:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:49,671 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-12 13:11:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:11:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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) Word has length 11 [2024-11-12 13:11:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:49,672 INFO L225 Difference]: With dead ends: 32 [2024-11-12 13:11:49,672 INFO L226 Difference]: Without dead ends: 32 [2024-11-12 13:11:49,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:11:49,673 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:49,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 108 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-12 13:11:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-12 13:11:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) 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) [2024-11-12 13:11:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-12 13:11:49,675 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 11 [2024-11-12 13:11:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:49,675 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-12 13:11:49,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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) [2024-11-12 13:11:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-12 13:11:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-12 13:11:49,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:49,678 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:49,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 13:11:49,878 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 [2024-11-12 13:11:49,879 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:49,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2054201551, now seen corresponding path program 1 times [2024-11-12 13:11:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401946007] [2024-11-12 13:11:49,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401946007] [2024-11-12 13:11:50,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401946007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:50,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-12 13:11:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246624882] [2024-11-12 13:11:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:50,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 13:11:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 13:11:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:11:50,001 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:50,039 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-12 13:11:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:11:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-12 13:11:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:50,040 INFO L225 Difference]: With dead ends: 37 [2024-11-12 13:11:50,040 INFO L226 Difference]: Without dead ends: 37 [2024-11-12 13:11:50,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:11:50,041 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:50,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 93 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-12 13:11:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-12 13:11:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-12 13:11:50,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2024-11-12 13:11:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:50,043 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-12 13:11:50,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-12 13:11:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-12 13:11:50,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:50,044 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:50,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 13:11:50,044 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:50,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1353136973, now seen corresponding path program 1 times [2024-11-12 13:11:50,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:50,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236900921] [2024-11-12 13:11:50,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:50,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:50,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236900921] [2024-11-12 13:11:50,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236900921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:50,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:50,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 13:11:50,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058676380] [2024-11-12 13:11:50,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:50,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 13:11:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 13:11:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:11:50,141 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:50,186 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2024-11-12 13:11:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:11:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-12 13:11:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:50,187 INFO L225 Difference]: With dead ends: 51 [2024-11-12 13:11:50,187 INFO L226 Difference]: Without dead ends: 51 [2024-11-12 13:11:50,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:11:50,187 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:50,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-12 13:11:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2024-11-12 13:11:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 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) [2024-11-12 13:11:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-12 13:11:50,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-11-12 13:11:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:50,189 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-12 13:11:50,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-12 13:11:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-12 13:11:50,190 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:50,190 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:50,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 13:11:50,190 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:50,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1094971535, now seen corresponding path program 1 times [2024-11-12 13:11:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:50,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128028938] [2024-11-12 13:11:50,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128028938] [2024-11-12 13:11:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128028938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:50,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:50,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 13:11:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935519105] [2024-11-12 13:11:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:50,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 13:11:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 13:11:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:11:50,301 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:50,340 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-12 13:11:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:11:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-12 13:11:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:50,340 INFO L225 Difference]: With dead ends: 45 [2024-11-12 13:11:50,341 INFO L226 Difference]: Without dead ends: 45 [2024-11-12 13:11:50,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:11:50,341 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:50,341 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-12 13:11:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2024-11-12 13:11:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-12 13:11:50,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2024-11-12 13:11:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:50,343 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-12 13:11:50,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-12 13:11:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-12 13:11:50,344 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:50,344 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:50,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 13:11:50,344 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:50,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 744206182, now seen corresponding path program 1 times [2024-11-12 13:11:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343492147] [2024-11-12 13:11:50,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343492147] [2024-11-12 13:11:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343492147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:11:50,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:11:50,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:11:50,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362823359] [2024-11-12 13:11:50,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:11:50,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:11:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:11:50,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:11:50,417 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:50,427 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-12 13:11:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:11:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-12 13:11:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:50,427 INFO L225 Difference]: With dead ends: 33 [2024-11-12 13:11:50,428 INFO L226 Difference]: Without dead ends: 21 [2024-11-12 13:11:50,428 INFO L434 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 [2024-11-12 13:11:50,428 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 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 [2024-11-12 13:11:50,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:11:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-12 13:11:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-12 13:11:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-12 13:11:50,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-11-12 13:11:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:50,430 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-12 13:11:50,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-12 13:11:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-12 13:11:50,430 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:50,430 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:50,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 13:11:50,431 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:50,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 317531342, now seen corresponding path program 1 times [2024-11-12 13:11:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066611366] [2024-11-12 13:11:50,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066611366] [2024-11-12 13:11:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066611366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753702678] [2024-11-12 13:11:50,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:50,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:50,570 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) [2024-11-12 13:11:50,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 13:11:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:50,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 13:11:50,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:50,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:11:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:50,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753702678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:50,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:50,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-12 13:11:50,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814499836] [2024-11-12 13:11:50,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:50,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:11:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:11:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:11:50,796 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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) [2024-11-12 13:11:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:50,883 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-12 13:11:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:11:50,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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 18 [2024-11-12 13:11:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:50,884 INFO L225 Difference]: With dead ends: 31 [2024-11-12 13:11:50,884 INFO L226 Difference]: Without dead ends: 31 [2024-11-12 13:11:50,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:11:50,884 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:50,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 71 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-12 13:11:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-11-12 13:11:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-12 13:11:50,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2024-11-12 13:11:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:50,886 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-12 13:11:50,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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) [2024-11-12 13:11:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-12 13:11:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-12 13:11:50,886 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:50,886 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:50,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 13:11:51,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:51,091 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:51,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:51,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1253536998, now seen corresponding path program 1 times [2024-11-12 13:11:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515398862] [2024-11-12 13:11:51,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515398862] [2024-11-12 13:11:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515398862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358391128] [2024-11-12 13:11:51,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:51,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:51,272 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) [2024-11-12 13:11:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 13:11:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:51,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 13:11:51,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:51,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:11:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:11:51,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:11:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:51,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:51,610 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:11:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358391128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:51,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:51,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-12 13:11:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448676494] [2024-11-12 13:11:51,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:51,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:11:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:11:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:11:51,642 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:51,779 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-11-12 13:11:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:11:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-12 13:11:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:51,781 INFO L225 Difference]: With dead ends: 30 [2024-11-12 13:11:51,781 INFO L226 Difference]: Without dead ends: 30 [2024-11-12 13:11:51,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-12 13:11:51,782 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:51,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-12 13:11:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2024-11-12 13:11:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-12 13:11:51,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2024-11-12 13:11:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:51,783 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-12 13:11:51,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-12 13:11:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-12 13:11:51,783 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:51,783 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:51,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 13:11:51,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:51,984 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:51,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash -619936215, now seen corresponding path program 2 times [2024-11-12 13:11:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:51,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334171347] [2024-11-12 13:11:51,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334171347] [2024-11-12 13:11:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334171347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345205647] [2024-11-12 13:11:52,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:11:52,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:52,257 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) [2024-11-12 13:11:52,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 13:11:52,321 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:11:52,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:11:52,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 13:11:52,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:52,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:11:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:52,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:52,441 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 [2024-11-12 13:11:52,443 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 16 treesize of output 12 [2024-11-12 13:11:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:52,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345205647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:52,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:52,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-11-12 13:11:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003285270] [2024-11-12 13:11:52,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:52,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 13:11:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 13:11:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-12 13:11:52,495 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2024-11-12 13:11:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:52,624 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-12 13:11:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 13:11:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-12 13:11:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:52,624 INFO L225 Difference]: With dead ends: 42 [2024-11-12 13:11:52,625 INFO L226 Difference]: Without dead ends: 32 [2024-11-12 13:11:52,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-11-12 13:11:52,625 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:52,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-12 13:11:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-12 13:11:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 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) [2024-11-12 13:11:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-12 13:11:52,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2024-11-12 13:11:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:52,627 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-12 13:11:52,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2024-11-12 13:11:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-12 13:11:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-12 13:11:52,627 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:52,628 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:52,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 13:11:52,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:52,832 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:52,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -399184250, now seen corresponding path program 3 times [2024-11-12 13:11:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108192469] [2024-11-12 13:11:52,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:53,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108192469] [2024-11-12 13:11:53,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108192469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:53,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505845216] [2024-11-12 13:11:53,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:11:53,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:53,016 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) [2024-11-12 13:11:53,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 13:11:53,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 13:11:53,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:11:53,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-12 13:11:53,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:53,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:11:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:53,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:53,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505845216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:53,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:53,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-12 13:11:53,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630441428] [2024-11-12 13:11:53,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:53,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 13:11:53,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 13:11:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:11:53,598 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:53,740 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-12 13:11:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 13:11:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-12 13:11:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:53,742 INFO L225 Difference]: With dead ends: 36 [2024-11-12 13:11:53,742 INFO L226 Difference]: Without dead ends: 36 [2024-11-12 13:11:53,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-12 13:11:53,743 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:53,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-12 13:11:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-11-12 13:11:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 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) [2024-11-12 13:11:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-12 13:11:53,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2024-11-12 13:11:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:53,744 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-12 13:11:53,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-12 13:11:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-12 13:11:53,745 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:53,745 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:53,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 13:11:53,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-12 13:11:53,950 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:53,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 510190126, now seen corresponding path program 2 times [2024-11-12 13:11:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:53,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622135127] [2024-11-12 13:11:53,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:53,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:54,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:54,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622135127] [2024-11-12 13:11:54,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622135127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:54,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50786179] [2024-11-12 13:11:54,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:11:54,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:54,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:54,243 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) [2024-11-12 13:11:54,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 13:11:54,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:11:54,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:11:54,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-12 13:11:54,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:54,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:11:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:11:54,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:11:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:54,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:11:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50786179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:55,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 28 [2024-11-12 13:11:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788009714] [2024-11-12 13:11:55,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:55,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 13:11:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 13:11:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:11:55,097 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 29 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:55,304 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2024-11-12 13:11:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 13:11:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-12 13:11:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:55,305 INFO L225 Difference]: With dead ends: 42 [2024-11-12 13:11:55,305 INFO L226 Difference]: Without dead ends: 42 [2024-11-12 13:11:55,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2024-11-12 13:11:55,306 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:55,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 95 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:11:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-12 13:11:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-11-12 13:11:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-12 13:11:55,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2024-11-12 13:11:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:55,308 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-12 13:11:55,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-12 13:11:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:11:55,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:55,309 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:55,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 13:11:55,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:55,509 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:55,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash -815221791, now seen corresponding path program 4 times [2024-11-12 13:11:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463682442] [2024-11-12 13:11:55,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:55,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463682442] [2024-11-12 13:11:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463682442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859749343] [2024-11-12 13:11:55,758 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:11:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:55,762 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) [2024-11-12 13:11:55,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 13:11:55,854 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:11:55,854 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:11:55,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 13:11:55,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:55,880 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 [2024-11-12 13:11:56,818 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2024-11-12 13:11:56,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2024-11-12 13:11:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:11:56,928 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:57,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-12 13:11:57,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-12 13:11:57,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:11:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:11:57,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859749343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:57,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:57,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-11-12 13:11:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973958183] [2024-11-12 13:11:57,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:57,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-12 13:11:57,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-12 13:11:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 13:11:57,369 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:11:58,238 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-12 13:11:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-12 13:11:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:11:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:11:58,239 INFO L225 Difference]: With dead ends: 55 [2024-11-12 13:11:58,239 INFO L226 Difference]: Without dead ends: 41 [2024-11-12 13:11:58,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=377, Invalid=2275, Unknown=0, NotChecked=0, Total=2652 [2024-11-12 13:11:58,240 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:11:58,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 118 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:11:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-12 13:11:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2024-11-12 13:11:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2024-11-12 13:11:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-12 13:11:58,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2024-11-12 13:11:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:11:58,242 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-12 13:11:58,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:11:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-12 13:11:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-12 13:11:58,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:11:58,243 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:11:58,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 13:11:58,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:58,448 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:11:58,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:11:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash -232228746, now seen corresponding path program 3 times [2024-11-12 13:11:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:11:58,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950907621] [2024-11-12 13:11:58,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:11:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:11:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:11:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:58,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:11:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950907621] [2024-11-12 13:11:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950907621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:11:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022890793] [2024-11-12 13:11:58,731 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:11:58,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:11:58,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:11:58,733 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) [2024-11-12 13:11:58,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 13:11:58,807 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-12 13:11:58,807 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:11:58,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-12 13:11:58,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:11:58,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:11:58,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:11:58,866 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 [2024-11-12 13:11:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:59,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:11:59,746 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:11:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:11:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022890793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:11:59,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:11:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 34 [2024-11-12 13:11:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722076549] [2024-11-12 13:11:59,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:11:59,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-12 13:11:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:11:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-12 13:11:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 13:11:59,781 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 35 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:00,116 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-11-12 13:12:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 13:12:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-12 13:12:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:00,117 INFO L225 Difference]: With dead ends: 49 [2024-11-12 13:12:00,117 INFO L226 Difference]: Without dead ends: 49 [2024-11-12 13:12:00,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2024-11-12 13:12:00,118 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:00,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 177 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-12 13:12:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2024-11-12 13:12:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-12 13:12:00,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2024-11-12 13:12:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:00,119 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-12 13:12:00,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-12 13:12:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-12 13:12:00,120 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:00,120 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:00,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 13:12:00,321 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,SelfDestructingSolverStorable24 [2024-11-12 13:12:00,321 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:00,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1068038779, now seen corresponding path program 4 times [2024-11-12 13:12:00,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404742963] [2024-11-12 13:12:00,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404742963] [2024-11-12 13:12:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404742963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248470180] [2024-11-12 13:12:00,683 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:12:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:00,684 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) [2024-11-12 13:12:00,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 13:12:00,772 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:12:00,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:00,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 13:12:00,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:00,977 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 [2024-11-12 13:12:01,392 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-12 13:12:01,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2024-11-12 13:12:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:01,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:01,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-12 13:12:01,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:12:01,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-11-12 13:12:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:01,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248470180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:01,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:01,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 38 [2024-11-12 13:12:01,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176022] [2024-11-12 13:12:01,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:01,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 13:12:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 13:12:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 13:12:01,758 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:02,437 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2024-11-12 13:12:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 13:12:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 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 39 [2024-11-12 13:12:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:02,438 INFO L225 Difference]: With dead ends: 65 [2024-11-12 13:12:02,438 INFO L226 Difference]: Without dead ends: 47 [2024-11-12 13:12:02,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2024-11-12 13:12:02,440 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:02,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 174 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:12:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-12 13:12:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-11-12 13:12:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-11-12 13:12:02,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2024-11-12 13:12:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:02,447 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-11-12 13:12:02,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-11-12 13:12:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-12 13:12:02,447 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:02,447 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:02,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:02,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-12 13:12:02,650 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:02,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -732121154, now seen corresponding path program 5 times [2024-11-12 13:12:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284739673] [2024-11-12 13:12:02,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284739673] [2024-11-12 13:12:03,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284739673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956835761] [2024-11-12 13:12:03,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:12:03,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:03,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:03,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 13:12:03,360 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-12 13:12:03,360 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:03,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-12 13:12:03,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:03,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:03,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:03,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:03,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956835761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:04,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:04,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 36 [2024-11-12 13:12:04,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905719349] [2024-11-12 13:12:04,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:04,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-12 13:12:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-12 13:12:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2024-11-12 13:12:04,457 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:04,772 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2024-11-12 13:12:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-12 13:12:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 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 43 [2024-11-12 13:12:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:04,773 INFO L225 Difference]: With dead ends: 50 [2024-11-12 13:12:04,773 INFO L226 Difference]: Without dead ends: 50 [2024-11-12 13:12:04,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2024-11-12 13:12:04,774 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:04,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 200 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:12:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-12 13:12:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-12 13:12:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-12 13:12:04,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2024-11-12 13:12:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:04,775 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-12 13:12:04,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-12 13:12:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-12 13:12:04,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:04,776 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:04,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 13:12:04,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 13:12:04,981 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:04,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1671189955, now seen corresponding path program 6 times [2024-11-12 13:12:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257073812] [2024-11-12 13:12:04,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:05,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:05,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257073812] [2024-11-12 13:12:05,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257073812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:05,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248670824] [2024-11-12 13:12:05,366 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:12:05,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:05,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:05,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 13:12:05,477 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-12 13:12:05,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:05,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-12 13:12:05,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:05,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-12 13:12:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:05,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:06,065 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 [2024-11-12 13:12:06,066 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 16 treesize of output 12 [2024-11-12 13:12:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248670824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:06,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:06,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2024-11-12 13:12:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729534456] [2024-11-12 13:12:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:06,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-12 13:12:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-12 13:12:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2024-11-12 13:12:06,267 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:07,075 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-11-12 13:12:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 13:12:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-12 13:12:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:07,075 INFO L225 Difference]: With dead ends: 77 [2024-11-12 13:12:07,075 INFO L226 Difference]: Without dead ends: 55 [2024-11-12 13:12:07,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=3287, Unknown=0, NotChecked=0, Total=3540 [2024-11-12 13:12:07,077 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:07,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 374 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:12:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-12 13:12:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-12 13:12:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-12 13:12:07,079 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2024-11-12 13:12:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:07,079 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-12 13:12:07,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-12 13:12:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-12 13:12:07,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:07,079 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:07,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:07,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 13:12:07,280 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:07,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash -382984186, now seen corresponding path program 7 times [2024-11-12 13:12:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:07,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229989100] [2024-11-12 13:12:07,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229989100] [2024-11-12 13:12:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229989100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193462351] [2024-11-12 13:12:07,691 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:12:07,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:07,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:07,693 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:07,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 13:12:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:07,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-12 13:12:07,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:07,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:07,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:12:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:08,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:09,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193462351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:09,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:09,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2024-11-12 13:12:09,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253113619] [2024-11-12 13:12:09,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:09,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-12 13:12:09,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:09,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-12 13:12:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2024-11-12 13:12:09,225 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:09,910 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2024-11-12 13:12:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 13:12:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-12 13:12:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:09,911 INFO L225 Difference]: With dead ends: 59 [2024-11-12 13:12:09,911 INFO L226 Difference]: Without dead ends: 59 [2024-11-12 13:12:09,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2024-11-12 13:12:09,912 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:09,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 322 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:12:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-12 13:12:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-12 13:12:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-11-12 13:12:09,914 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2024-11-12 13:12:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:09,914 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-11-12 13:12:09,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-11-12 13:12:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-12 13:12:09,914 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:09,914 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:09,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:10,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-12 13:12:10,119 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:10,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash 913201675, now seen corresponding path program 8 times [2024-11-12 13:12:10,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:10,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124312675] [2024-11-12 13:12:10,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:10,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124312675] [2024-11-12 13:12:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124312675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316024600] [2024-11-12 13:12:10,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:12:10,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:10,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:10,662 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:10,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 13:12:10,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:12:10,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:10,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-12 13:12:10,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:10,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:12:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:11,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:11,107 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 [2024-11-12 13:12:11,108 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 16 treesize of output 12 [2024-11-12 13:12:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316024600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:11,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-11-12 13:12:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196391484] [2024-11-12 13:12:11,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:11,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-12 13:12:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-12 13:12:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2024-11-12 13:12:11,190 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:11,988 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2024-11-12 13:12:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 13:12:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-12 13:12:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:11,989 INFO L225 Difference]: With dead ends: 89 [2024-11-12 13:12:11,989 INFO L226 Difference]: Without dead ends: 63 [2024-11-12 13:12:11,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2024-11-12 13:12:11,990 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:11,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 386 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:12:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-12 13:12:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-12 13:12:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-12 13:12:11,992 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2024-11-12 13:12:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:11,992 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-12 13:12:11,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-12 13:12:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-12 13:12:11,995 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:11,995 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:12,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:12,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:12,196 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:12,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1971506866, now seen corresponding path program 9 times [2024-11-12 13:12:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:12,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367356126] [2024-11-12 13:12:12,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:12,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367356126] [2024-11-12 13:12:12,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367356126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:12,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828340813] [2024-11-12 13:12:12,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:12:12,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:12,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:12,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 13:12:12,929 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-12 13:12:12,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:12,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-12 13:12:12,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:12,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:12,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:12:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:14,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:15,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828340813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:15,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:15,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 54 [2024-11-12 13:12:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140903684] [2024-11-12 13:12:15,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:15,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-12 13:12:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-12 13:12:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2742, Unknown=0, NotChecked=0, Total=2970 [2024-11-12 13:12:15,549 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:17,130 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2024-11-12 13:12:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 13:12:17,130 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-12 13:12:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:17,132 INFO L225 Difference]: With dead ends: 73 [2024-11-12 13:12:17,132 INFO L226 Difference]: Without dead ends: 73 [2024-11-12 13:12:17,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=489, Invalid=4913, Unknown=0, NotChecked=0, Total=5402 [2024-11-12 13:12:17,133 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:17,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 499 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:12:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-12 13:12:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2024-11-12 13:12:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-12 13:12:17,135 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2024-11-12 13:12:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:17,135 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-12 13:12:17,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-12 13:12:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-12 13:12:17,135 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:17,135 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:17,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:17,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:17,336 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:17,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1161459885, now seen corresponding path program 10 times [2024-11-12 13:12:17,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:17,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558939790] [2024-11-12 13:12:17,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 73 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558939790] [2024-11-12 13:12:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558939790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669805069] [2024-11-12 13:12:17,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:12:17,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:17,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:17,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 13:12:18,022 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:12:18,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:18,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-12 13:12:18,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:18,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:12:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:18,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:18,423 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 [2024-11-12 13:12:18,425 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 16 treesize of output 12 [2024-11-12 13:12:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:18,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669805069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:18,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:18,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-11-12 13:12:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910823330] [2024-11-12 13:12:18,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:18,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-12 13:12:18,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-12 13:12:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2024-11-12 13:12:18,503 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:19,256 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2024-11-12 13:12:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-12 13:12:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-12 13:12:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:19,258 INFO L225 Difference]: With dead ends: 101 [2024-11-12 13:12:19,258 INFO L226 Difference]: Without dead ends: 71 [2024-11-12 13:12:19,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=3496, Unknown=0, NotChecked=0, Total=3782 [2024-11-12 13:12:19,262 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:19,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 410 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:12:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-12 13:12:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-11-12 13:12:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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) [2024-11-12 13:12:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-12 13:12:19,263 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2024-11-12 13:12:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:19,263 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-12 13:12:19,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-12 13:12:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-12 13:12:19,264 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:19,264 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:19,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:19,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:19,464 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:19,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1744202646, now seen corresponding path program 11 times [2024-11-12 13:12:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655997947] [2024-11-12 13:12:19,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655997947] [2024-11-12 13:12:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655997947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834202426] [2024-11-12 13:12:19,975 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:12:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:19,977 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:19,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 13:12:20,188 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-12 13:12:20,189 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:20,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-12 13:12:20,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:20,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:20,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:20,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:21,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:21,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834202426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:21,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 20] total 55 [2024-11-12 13:12:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544185686] [2024-11-12 13:12:21,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:21,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-12 13:12:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-12 13:12:21,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2748, Unknown=0, NotChecked=0, Total=3080 [2024-11-12 13:12:21,963 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:22,613 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2024-11-12 13:12:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 13:12:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 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 67 [2024-11-12 13:12:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:22,614 INFO L225 Difference]: With dead ends: 74 [2024-11-12 13:12:22,614 INFO L226 Difference]: Without dead ends: 74 [2024-11-12 13:12:22,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2024-11-12 13:12:22,615 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:22,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 444 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-12 13:12:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-12 13:12:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-12 13:12:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-11-12 13:12:22,616 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2024-11-12 13:12:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:22,616 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-11-12 13:12:22,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-11-12 13:12:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-12 13:12:22,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:22,617 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:22,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 13:12:22,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-12 13:12:22,826 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:22,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1762155931, now seen corresponding path program 12 times [2024-11-12 13:12:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001641184] [2024-11-12 13:12:22,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:22,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 99 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001641184] [2024-11-12 13:12:23,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001641184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894585539] [2024-11-12 13:12:23,437 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:12:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:23,440 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:23,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 13:12:23,817 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-12 13:12:23,817 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:23,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-12 13:12:23,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:24,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:12:24,268 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 7 treesize of output 3 [2024-11-12 13:12:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:24,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:24,330 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 [2024-11-12 13:12:24,332 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 16 treesize of output 12 [2024-11-12 13:12:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:24,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894585539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:24,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:24,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2024-11-12 13:12:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993357485] [2024-11-12 13:12:24,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:24,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-12 13:12:24,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-12 13:12:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2024-11-12 13:12:24,427 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:25,616 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2024-11-12 13:12:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-12 13:12:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-12 13:12:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:25,617 INFO L225 Difference]: With dead ends: 113 [2024-11-12 13:12:25,617 INFO L226 Difference]: Without dead ends: 79 [2024-11-12 13:12:25,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=337, Invalid=4355, Unknown=0, NotChecked=0, Total=4692 [2024-11-12 13:12:25,619 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:25,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 580 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-12 13:12:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-12 13:12:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-11-12 13:12:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-12 13:12:25,620 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2024-11-12 13:12:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:25,620 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-12 13:12:25,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-12 13:12:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-12 13:12:25,621 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:25,621 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:25,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-12 13:12:25,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:25,821 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:25,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1493283106, now seen corresponding path program 13 times [2024-11-12 13:12:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:25,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807865365] [2024-11-12 13:12:25,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:25,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:26,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807865365] [2024-11-12 13:12:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807865365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538761709] [2024-11-12 13:12:26,481 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:12:26,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:26,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:26,482 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:26,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 13:12:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:26,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-12 13:12:26,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:26,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:26,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:27,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:28,854 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538761709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:28,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 64 [2024-11-12 13:12:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005115226] [2024-11-12 13:12:28,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:28,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-12 13:12:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-12 13:12:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3824, Unknown=0, NotChecked=0, Total=4160 [2024-11-12 13:12:28,904 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 65 states, 64 states have (on average 3.484375) internal successors, (223), 65 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:29,985 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2024-11-12 13:12:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 13:12:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.484375) internal successors, (223), 65 states have internal predecessors, (223), 0 states have call successors, (0), 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 75 [2024-11-12 13:12:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:29,986 INFO L225 Difference]: With dead ends: 89 [2024-11-12 13:12:29,986 INFO L226 Difference]: Without dead ends: 89 [2024-11-12 13:12:29,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=462, Invalid=4940, Unknown=0, NotChecked=0, Total=5402 [2024-11-12 13:12:29,987 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:29,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 629 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-12 13:12:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-12 13:12:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-11-12 13:12:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-11-12 13:12:29,989 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2024-11-12 13:12:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:29,989 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-11-12 13:12:29,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.484375) internal successors, (223), 65 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-11-12 13:12:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-12 13:12:29,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:29,990 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:30,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:30,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:30,193 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:30,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1331518691, now seen corresponding path program 14 times [2024-11-12 13:12:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:30,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969085188] [2024-11-12 13:12:30,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969085188] [2024-11-12 13:12:31,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969085188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:31,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751930379] [2024-11-12 13:12:31,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:12:31,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:31,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:31,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:31,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 13:12:31,196 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:12:31,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:31,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-12 13:12:31,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:31,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:12:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:31,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:31,848 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 [2024-11-12 13:12:31,849 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 16 treesize of output 12 [2024-11-12 13:12:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:31,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751930379] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:31,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:31,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-12 13:12:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714882108] [2024-11-12 13:12:31,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:31,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-12 13:12:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-12 13:12:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2024-11-12 13:12:31,958 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:33,408 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2024-11-12 13:12:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 13:12:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-12 13:12:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:33,409 INFO L225 Difference]: With dead ends: 125 [2024-11-12 13:12:33,410 INFO L226 Difference]: Without dead ends: 87 [2024-11-12 13:12:33,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=392, Invalid=5308, Unknown=0, NotChecked=0, Total=5700 [2024-11-12 13:12:33,410 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:33,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 650 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:12:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-12 13:12:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-11-12 13:12:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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) [2024-11-12 13:12:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2024-11-12 13:12:33,416 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2024-11-12 13:12:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:33,417 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2024-11-12 13:12:33,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2024-11-12 13:12:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-12 13:12:33,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:33,417 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:33,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:33,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:33,618 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:33,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash 45832998, now seen corresponding path program 15 times [2024-11-12 13:12:33,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:33,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323167656] [2024-11-12 13:12:33,618 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:33,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323167656] [2024-11-12 13:12:34,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323167656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502089028] [2024-11-12 13:12:34,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:12:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:34,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:34,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 13:12:34,751 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-12 13:12:34,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:34,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-12 13:12:34,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:34,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:34,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:36,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502089028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:37,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 25] total 70 [2024-11-12 13:12:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662782626] [2024-11-12 13:12:37,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:37,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-12 13:12:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-12 13:12:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4471, Unknown=0, NotChecked=0, Total=4970 [2024-11-12 13:12:37,406 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:38,446 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-12 13:12:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-12 13:12:38,447 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 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 83 [2024-11-12 13:12:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:38,449 INFO L225 Difference]: With dead ends: 97 [2024-11-12 13:12:38,449 INFO L226 Difference]: Without dead ends: 97 [2024-11-12 13:12:38,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=648, Invalid=5832, Unknown=0, NotChecked=0, Total=6480 [2024-11-12 13:12:38,450 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:38,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 604 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:12:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-12 13:12:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-11-12 13:12:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-11-12 13:12:38,453 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2024-11-12 13:12:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:38,453 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-11-12 13:12:38,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-11-12 13:12:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-12 13:12:38,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:38,457 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:38,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-12 13:12:38,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-12 13:12:38,658 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:38,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 833291563, now seen corresponding path program 16 times [2024-11-12 13:12:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:38,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013134332] [2024-11-12 13:12:38,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 163 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:39,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013134332] [2024-11-12 13:12:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013134332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250636027] [2024-11-12 13:12:39,596 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:12:39,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:39,598 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:39,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 13:12:39,916 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:12:39,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:39,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-12 13:12:39,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:40,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:12:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:40,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:40,683 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 [2024-11-12 13:12:40,687 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 16 treesize of output 12 [2024-11-12 13:12:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250636027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:40,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:40,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2024-11-12 13:12:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8783015] [2024-11-12 13:12:40,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:40,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-12 13:12:40,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-12 13:12:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2494, Unknown=0, NotChecked=0, Total=2652 [2024-11-12 13:12:40,822 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:42,528 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2024-11-12 13:12:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-12 13:12:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 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 87 [2024-11-12 13:12:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:42,531 INFO L225 Difference]: With dead ends: 137 [2024-11-12 13:12:42,531 INFO L226 Difference]: Without dead ends: 95 [2024-11-12 13:12:42,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=451, Invalid=6355, Unknown=0, NotChecked=0, Total=6806 [2024-11-12 13:12:42,535 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:42,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 834 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-12 13:12:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-12 13:12:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-11-12 13:12:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2024-11-12 13:12:42,536 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2024-11-12 13:12:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:42,536 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2024-11-12 13:12:42,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.3461538461538463) internal successors, (174), 52 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2024-11-12 13:12:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-12 13:12:42,537 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:42,537 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:42,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-12 13:12:42,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-12 13:12:42,744 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:42,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash -334229394, now seen corresponding path program 17 times [2024-11-12 13:12:42,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:42,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216674016] [2024-11-12 13:12:42,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216674016] [2024-11-12 13:12:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216674016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085363511] [2024-11-12 13:12:43,576 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:12:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:43,578 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 13:12:44,136 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-12 13:12:44,136 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:44,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-12 13:12:44,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:44,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:44,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 153 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:45,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:47,125 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 190 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085363511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:47,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:47,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 72 [2024-11-12 13:12:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881395018] [2024-11-12 13:12:47,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:47,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-12 13:12:47,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-12 13:12:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=4647, Unknown=0, NotChecked=0, Total=5256 [2024-11-12 13:12:47,200 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 73 states, 72 states have (on average 3.763888888888889) internal successors, (271), 73 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:47,951 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2024-11-12 13:12:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 13:12:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.763888888888889) internal successors, (271), 73 states have internal predecessors, (271), 0 states have call successors, (0), 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 91 [2024-11-12 13:12:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:47,952 INFO L225 Difference]: With dead ends: 98 [2024-11-12 13:12:47,952 INFO L226 Difference]: Without dead ends: 98 [2024-11-12 13:12:47,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=648, Invalid=4902, Unknown=0, NotChecked=0, Total=5550 [2024-11-12 13:12:47,953 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:47,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 631 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:12:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-12 13:12:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-12 13:12:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2024-11-12 13:12:47,957 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2024-11-12 13:12:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:47,957 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2024-11-12 13:12:47,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.763888888888889) internal successors, (271), 73 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2024-11-12 13:12:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-12 13:12:47,958 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:47,958 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:47,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-12 13:12:48,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-12 13:12:48,162 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:48,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1449666957, now seen corresponding path program 18 times [2024-11-12 13:12:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705280049] [2024-11-12 13:12:48,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 201 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705280049] [2024-11-12 13:12:49,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705280049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:49,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165236582] [2024-11-12 13:12:49,346 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:12:49,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:49,347 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:49,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-12 13:12:50,437 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-12 13:12:50,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:50,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-12 13:12:50,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:50,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-12 13:12:51,555 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 7 treesize of output 3 [2024-11-12 13:12:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:51,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:52,170 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 [2024-11-12 13:12:52,171 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 16 treesize of output 12 [2024-11-12 13:12:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165236582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 79 [2024-11-12 13:12:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34064296] [2024-11-12 13:12:52,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:52,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-12 13:12:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-12 13:12:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5914, Unknown=0, NotChecked=0, Total=6162 [2024-11-12 13:12:52,819 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 79 states, 79 states have (on average 3.430379746835443) internal successors, (271), 79 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:55,731 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2024-11-12 13:12:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-12 13:12:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.430379746835443) internal successors, (271), 79 states have internal predecessors, (271), 0 states have call successors, (0), 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 95 [2024-11-12 13:12:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:55,732 INFO L225 Difference]: With dead ends: 149 [2024-11-12 13:12:55,732 INFO L226 Difference]: Without dead ends: 103 [2024-11-12 13:12:55,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=625, Invalid=12257, Unknown=0, NotChecked=0, Total=12882 [2024-11-12 13:12:55,733 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 3387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:55,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1204 Invalid, 3387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3357 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-12 13:12:55,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-12 13:12:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2024-11-12 13:12:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2024-11-12 13:12:55,734 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2024-11-12 13:12:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:55,735 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2024-11-12 13:12:55,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.430379746835443) internal successors, (271), 79 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2024-11-12 13:12:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-12 13:12:55,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:55,735 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:55,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-12 13:12:55,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:55,936 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:12:55,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1448153418, now seen corresponding path program 19 times [2024-11-12 13:12:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:55,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839257382] [2024-11-12 13:12:55,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:55,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839257382] [2024-11-12 13:12:56,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839257382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:56,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517715232] [2024-11-12 13:12:56,824 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:12:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:56,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:12:56,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-12 13:12:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:56,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-12 13:12:56,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:57,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:12:57,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:57,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:58,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:00,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:13:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517715232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:00,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:00,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 82 [2024-11-12 13:13:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495536612] [2024-11-12 13:13:00,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:00,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-12 13:13:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-12 13:13:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=6302, Unknown=0, NotChecked=0, Total=6806 [2024-11-12 13:13:00,290 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 83 states, 82 states have (on average 3.597560975609756) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:02,169 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-11-12 13:13:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-12 13:13:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.597560975609756) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 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 99 [2024-11-12 13:13:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:02,170 INFO L225 Difference]: With dead ends: 113 [2024-11-12 13:13:02,170 INFO L226 Difference]: Without dead ends: 113 [2024-11-12 13:13:02,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=705, Invalid=8225, Unknown=0, NotChecked=0, Total=8930 [2024-11-12 13:13:02,171 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 3274 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 3289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:02,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1110 Invalid, 3289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3274 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-12 13:13:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-12 13:13:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-11-12 13:13:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2024-11-12 13:13:02,173 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2024-11-12 13:13:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:02,179 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2024-11-12 13:13:02,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.597560975609756) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2024-11-12 13:13:02,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-12 13:13:02,180 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:02,180 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:02,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-12 13:13:02,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:02,384 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:13:02,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1183469755, now seen corresponding path program 20 times [2024-11-12 13:13:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100215243] [2024-11-12 13:13:02,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 243 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:03,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100215243] [2024-11-12 13:13:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100215243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:03,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923140740] [2024-11-12 13:13:03,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:03,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:03,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:03,447 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:03,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-12 13:13:03,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:03,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:03,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-12 13:13:03,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:03,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-12 13:13:03,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:13:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 288 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:05,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 288 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:06,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923140740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:06,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:06,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 72 [2024-11-12 13:13:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564599903] [2024-11-12 13:13:06,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:06,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-12 13:13:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-12 13:13:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=4339, Unknown=0, NotChecked=0, Total=5112 [2024-11-12 13:13:06,167 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 72 states, 72 states have (on average 3.5555555555555554) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:06,798 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2024-11-12 13:13:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 13:13:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.5555555555555554) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 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 103 [2024-11-12 13:13:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:06,799 INFO L225 Difference]: With dead ends: 163 [2024-11-12 13:13:06,799 INFO L226 Difference]: Without dead ends: 111 [2024-11-12 13:13:06,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 152 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=858, Invalid=4842, Unknown=0, NotChecked=0, Total=5700 [2024-11-12 13:13:06,799 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:06,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 344 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:13:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-12 13:13:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-11-12 13:13:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2024-11-12 13:13:06,801 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2024-11-12 13:13:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:06,801 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2024-11-12 13:13:06,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.5555555555555554) internal successors, (256), 72 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2024-11-12 13:13:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-12 13:13:06,802 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:06,802 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:06,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:07,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-12 13:13:07,006 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:13:07,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2012378622, now seen corresponding path program 21 times [2024-11-12 13:13:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851117312] [2024-11-12 13:13:07,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 190 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851117312] [2024-11-12 13:13:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851117312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258557226] [2024-11-12 13:13:08,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:08,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:08,781 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:08,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-12 13:13:10,919 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-12 13:13:10,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:10,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-12 13:13:10,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:10,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:13:10,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:13:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:13,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:15,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258557226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:15,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:15,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 87 [2024-11-12 13:13:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573248087] [2024-11-12 13:13:15,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:15,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-12 13:13:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-12 13:13:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=6901, Unknown=0, NotChecked=0, Total=7656 [2024-11-12 13:13:15,836 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 88 states, 87 states have (on average 3.6666666666666665) internal successors, (319), 88 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:18,559 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2024-11-12 13:13:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 13:13:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.6666666666666665) internal successors, (319), 88 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-12 13:13:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:18,560 INFO L225 Difference]: With dead ends: 114 [2024-11-12 13:13:18,560 INFO L226 Difference]: Without dead ends: 114 [2024-11-12 13:13:18,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1411, Invalid=12161, Unknown=0, NotChecked=0, Total=13572 [2024-11-12 13:13:18,566 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:18,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 904 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-12 13:13:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-12 13:13:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-12 13:13:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-11-12 13:13:18,568 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2024-11-12 13:13:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:18,569 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-11-12 13:13:18,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.6666666666666665) internal successors, (319), 88 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-11-12 13:13:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-12 13:13:18,569 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:18,569 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:18,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-12 13:13:18,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-12 13:13:18,770 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-12 13:13:18,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1381436413, now seen corresponding path program 22 times [2024-11-12 13:13:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:18,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158100521] [2024-11-12 13:13:18,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 289 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:19,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:19,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158100521] [2024-11-12 13:13:19,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158100521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:19,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150472288] [2024-11-12 13:13:19,899 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:19,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:19,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:19,901 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:19,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-12 13:13:20,379 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:20,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:20,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-12 13:13:20,386 INFO L279 TraceCheckSpWp]: Computing forward predicates...