./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-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_cstrpbrk-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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 13:12:25,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 13:12:26,077 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 13:12:26,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 13:12:26,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 13:12:26,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 13:12:26,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 13:12:26,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 13:12:26,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 13:12:26,120 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 13:12:26,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 13:12:26,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 13:12:26,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 13:12:26,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 13:12:26,126 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 13:12:26,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 13:12:26,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 13:12:26,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 13:12:26,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 13:12:26,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 13:12:26,127 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 13:12:26,128 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 13:12:26,128 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 13:12:26,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 13:12:26,128 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 13:12:26,129 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 13:12:26,129 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 13:12:26,129 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 13:12:26,129 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 13:12:26,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 13:12:26,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 13:12:26,130 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 13:12:26,130 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 13:12:26,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:12:26,131 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 13:12:26,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 13:12:26,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 13:12:26,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 13:12:26,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 13:12:26,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 13:12:26,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 13:12:26,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 13:12:26,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2024-11-12 13:12:26,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 13:12:26,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 13:12:26,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 13:12:26,429 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 13:12:26,429 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 13:12:26,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-11-12 13:12:27,919 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 13:12:28,178 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 13:12:28,179 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-11-12 13:12:28,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906ac42dd/38e5eccd35a04288b0ef73f3f4fa04dc/FLAG4382e0b46 [2024-11-12 13:12:28,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906ac42dd/38e5eccd35a04288b0ef73f3f4fa04dc [2024-11-12 13:12:28,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 13:12:28,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 13:12:28,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 13:12:28,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 13:12:28,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 13:12:28,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e29175e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28, skipping insertion in model container [2024-11-12 13:12:28,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 13:12:28,578 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 13:12:28,578 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 13:12:28,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:12:28,598 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 13:12:28,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:12:28,663 INFO L204 MainTranslator]: Completed translation [2024-11-12 13:12:28,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28 WrapperNode [2024-11-12 13:12:28,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 13:12:28,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 13:12:28,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 13:12:28,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 13:12:28,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,705 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2024-11-12 13:12:28,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 13:12:28,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 13:12:28,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 13:12:28,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 13:12:28,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,740 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-12 13:12:28,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 13:12:28,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 13:12:28,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 13:12:28,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 13:12:28,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (1/1) ... [2024-11-12 13:12:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:12:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:28,799 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 13:12:28,803 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 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 13:12:28,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 13:12:28,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 13:12:28,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 13:12:28,954 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 13:12:28,957 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 13:12:29,190 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-12 13:12:29,190 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 13:12:29,203 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 13:12:29,206 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 13:12:29,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:12:29 BoogieIcfgContainer [2024-11-12 13:12:29,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 13:12:29,209 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 13:12:29,209 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 13:12:29,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 13:12:29,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:12:28" (1/3) ... [2024-11-12 13:12:29,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522ff894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:12:29, skipping insertion in model container [2024-11-12 13:12:29,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:12:28" (2/3) ... [2024-11-12 13:12:29,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522ff894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:12:29, skipping insertion in model container [2024-11-12 13:12:29,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:12:29" (3/3) ... [2024-11-12 13:12:29,215 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2024-11-12 13:12:29,230 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 13:12:29,231 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-12 13:12:29,271 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 13:12:29,277 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;@79fcd5bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 13:12:29,278 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-12 13:12:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 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 13:12:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:12:29,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:29,290 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:29,291 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:29,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-12 13:12:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424119167] [2024-11-12 13:12:29,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:29,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:29,616 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 13:12:29,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424119167] [2024-11-12 13:12:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424119167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:29,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:29,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:12:29,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423258576] [2024-11-12 13:12:29,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:29,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:12:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:12:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:12:29,662 INFO L87 Difference]: Start difference. First operand has 45 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) 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 13:12:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:29,718 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-11-12 13:12:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:12:29,721 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 13:12:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:29,728 INFO L225 Difference]: With dead ends: 43 [2024-11-12 13:12:29,728 INFO L226 Difference]: Without dead ends: 41 [2024-11-12 13:12:29,729 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 13:12:29,732 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 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 13:12:29,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-12 13:12:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-12 13:12:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-12 13:12:29,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2024-11-12 13:12:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:29,761 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-12 13:12:29,761 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 13:12:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-12 13:12:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:12:29,761 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:29,761 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:29,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 13:12:29,762 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:29,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2024-11-12 13:12:29,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:29,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955388695] [2024-11-12 13:12:29,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:29,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:30,142 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 13:12:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955388695] [2024-11-12 13:12:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955388695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:12:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80353810] [2024-11-12 13:12:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:30,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:12:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:12:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:12:30,149 INFO L87 Difference]: Start difference. First operand 41 states and 47 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 13:12:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:30,252 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-11-12 13:12:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:12:30,252 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 13:12:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:30,254 INFO L225 Difference]: With dead ends: 61 [2024-11-12 13:12:30,254 INFO L226 Difference]: Without dead ends: 61 [2024-11-12 13:12:30,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:30,256 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:30,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 127 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-12 13:12:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2024-11-12 13:12:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-12 13:12:30,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 7 [2024-11-12 13:12:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:30,265 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-12 13:12:30,265 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 13:12:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-12 13:12:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:12:30,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:30,266 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:30,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 13:12:30,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:30,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-12 13:12:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:30,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312427123] [2024-11-12 13:12:30,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:30,525 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 13:12:30,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:30,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312427123] [2024-11-12 13:12:30,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312427123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:30,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:12:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029604569] [2024-11-12 13:12:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:30,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:12:30,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:12:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:30,528 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 13:12:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:30,585 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-12 13:12:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:12:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 13:12:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:30,588 INFO L225 Difference]: With dead ends: 49 [2024-11-12 13:12:30,588 INFO L226 Difference]: Without dead ends: 49 [2024-11-12 13:12:30,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:30,589 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:30,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-12 13:12:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2024-11-12 13:12:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.53125) internal successors, (49), 42 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 13:12:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-11-12 13:12:30,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2024-11-12 13:12:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:30,596 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-11-12 13:12:30,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 13:12:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-11-12 13:12:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:12:30,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:30,597 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:30,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 13:12:30,597 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:30,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2024-11-12 13:12:30,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187021885] [2024-11-12 13:12:30,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:30,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:30,656 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 13:12:30,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187021885] [2024-11-12 13:12:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187021885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109670113] [2024-11-12 13:12:30,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:30,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:30,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:30,660 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 13:12:30,661 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 13:12:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:30,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 13:12:30,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:30,820 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 13:12:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109670113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:30,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 13:12:30,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-12 13:12:30,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251684065] [2024-11-12 13:12:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:30,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:12:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:30,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:12:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:30,822 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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 13:12:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:30,857 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-11-12 13:12:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:12:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 13:12:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:30,859 INFO L225 Difference]: With dead ends: 59 [2024-11-12 13:12:30,860 INFO L226 Difference]: Without dead ends: 59 [2024-11-12 13:12:30,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:30,861 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:30,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-12 13:12:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-11-12 13:12:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 49 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 13:12:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-11-12 13:12:30,868 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 11 [2024-11-12 13:12:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:30,869 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-11-12 13:12:30,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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 13:12:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-11-12 13:12:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:12:30,870 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:30,870 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:30,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 13:12:31,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:31,075 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:31,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2024-11-12 13:12:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:31,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351733719] [2024-11-12 13:12:31,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:31,392 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 13:12:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351733719] [2024-11-12 13:12:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351733719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308574813] [2024-11-12 13:12:31,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:31,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:31,396 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 13:12:31,399 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 13:12:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:31,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 13:12:31,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:12:31,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-12 13:12:31,534 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 13:12:31,728 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 13:12:31,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:31,940 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:31,985 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 13:12:31,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308574813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:31,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:31,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-12 13:12:31,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332141875] [2024-11-12 13:12:31,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:31,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:12:31,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:12:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:12:31,988 INFO L87 Difference]: Start difference. First operand 50 states and 57 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 13:12:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:32,238 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-11-12 13:12:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:12:32,240 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 13:12:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:32,241 INFO L225 Difference]: With dead ends: 51 [2024-11-12 13:12:32,241 INFO L226 Difference]: Without dead ends: 51 [2024-11-12 13:12:32,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:12:32,242 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:32,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 324 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-12 13:12:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2024-11-12 13:12:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 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 13:12:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-12 13:12:32,252 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 11 [2024-11-12 13:12:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:32,253 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-12 13:12:32,254 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 13:12:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-12 13:12:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:12:32,255 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:32,255 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:32,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 13:12:32,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:32,457 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:32,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2024-11-12 13:12:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712435888] [2024-11-12 13:12:32,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:32,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:32,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712435888] [2024-11-12 13:12:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712435888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:32,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:12:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540443225] [2024-11-12 13:12:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:32,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:12:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:12:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:12:32,498 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:32,521 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-12 13:12:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:12:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:12:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:32,523 INFO L225 Difference]: With dead ends: 46 [2024-11-12 13:12:32,523 INFO L226 Difference]: Without dead ends: 46 [2024-11-12 13:12:32,523 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 13:12:32,524 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:32,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-12 13:12:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-12 13:12:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.394736842105263) internal successors, (53), 45 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 13:12:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2024-11-12 13:12:32,528 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2024-11-12 13:12:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:32,528 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2024-11-12 13:12:32,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2024-11-12 13:12:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:12:32,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:32,529 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:32,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 13:12:32,529 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:32,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2024-11-12 13:12:32,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:32,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831634682] [2024-11-12 13:12:32,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831634682] [2024-11-12 13:12:32,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831634682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:32,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:12:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514714256] [2024-11-12 13:12:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:32,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:12:32,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:12:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:32,658 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:32,749 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2024-11-12 13:12:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:12:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:12:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:32,750 INFO L225 Difference]: With dead ends: 72 [2024-11-12 13:12:32,750 INFO L226 Difference]: Without dead ends: 72 [2024-11-12 13:12:32,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:32,751 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:32,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 152 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-12 13:12:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-12 13:12:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 67 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 13:12:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-11-12 13:12:32,756 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 13 [2024-11-12 13:12:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:32,756 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-11-12 13:12:32,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-11-12 13:12:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:12:32,757 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:32,757 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:32,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 13:12:32,757 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:32,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2024-11-12 13:12:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615528864] [2024-11-12 13:12:32,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615528864] [2024-11-12 13:12:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615528864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:32,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:32,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 13:12:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106465881] [2024-11-12 13:12:32,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:32,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 13:12:32,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 13:12:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:32,898 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:32,972 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2024-11-12 13:12:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:12:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:12:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:32,973 INFO L225 Difference]: With dead ends: 74 [2024-11-12 13:12:32,974 INFO L226 Difference]: Without dead ends: 74 [2024-11-12 13:12:32,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:12:32,974 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:32,975 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-12 13:12:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-11-12 13:12:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 69 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 13:12:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-11-12 13:12:32,982 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 13 [2024-11-12 13:12:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:32,982 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-11-12 13:12:32,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-11-12 13:12:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-12 13:12:32,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:32,983 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:32,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 13:12:32,983 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:32,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2024-11-12 13:12:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:32,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860071207] [2024-11-12 13:12:32,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:33,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:33,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860071207] [2024-11-12 13:12:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860071207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:33,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99831474] [2024-11-12 13:12:33,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:33,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:33,046 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 13:12:33,047 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 13:12:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:33,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-12 13:12:33,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:33,156 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 13:12:33,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99831474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:33,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 13:12:33,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-12 13:12:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981461325] [2024-11-12 13:12:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:33,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:12:33,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:12:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:33,158 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:33,182 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2024-11-12 13:12:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:12:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-12 13:12:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:33,183 INFO L225 Difference]: With dead ends: 70 [2024-11-12 13:12:33,183 INFO L226 Difference]: Without dead ends: 70 [2024-11-12 13:12:33,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:33,184 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:33,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-12 13:12:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-12 13:12:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.278688524590164) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 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 13:12:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-11-12 13:12:33,193 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 17 [2024-11-12 13:12:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:33,193 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-11-12 13:12:33,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-11-12 13:12:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-12 13:12:33,194 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:33,194 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:33,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:33,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:33,396 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:33,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2024-11-12 13:12:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874061038] [2024-11-12 13:12:33,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874061038] [2024-11-12 13:12:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874061038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341618309] [2024-11-12 13:12:33,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:33,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:33,611 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 13:12:33,612 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 13:12:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:33,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 13:12:33,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:33,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-12 13:12:33,706 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 8 treesize of output 1 [2024-11-12 13:12:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:33,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:34,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341618309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:34,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:34,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-12 13:12:34,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134804404] [2024-11-12 13:12:34,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:34,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 13:12:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 13:12:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-11-12 13:12:34,268 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 19 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 13:12:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:34,426 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-11-12 13:12:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 13:12:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 19 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) Word has length 17 [2024-11-12 13:12:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:34,428 INFO L225 Difference]: With dead ends: 70 [2024-11-12 13:12:34,428 INFO L226 Difference]: Without dead ends: 70 [2024-11-12 13:12:34,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-12 13:12:34,429 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:34,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 179 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-12 13:12:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2024-11-12 13:12:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-12 13:12:34,433 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 17 [2024-11-12 13:12:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:34,433 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-12 13:12:34,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 19 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 13:12:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-12 13:12:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-12 13:12:34,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:34,434 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 13:12:34,452 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 13:12:34,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:34,639 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:34,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -958359342, now seen corresponding path program 1 times [2024-11-12 13:12:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008952407] [2024-11-12 13:12:34,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:34,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:34,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:34,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008952407] [2024-11-12 13:12:34,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008952407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:34,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780274217] [2024-11-12 13:12:34,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:34,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:34,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:34,756 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 13:12:34,757 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 13:12:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:34,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 13:12:34,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:34,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:34,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-12 13:12:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:35,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780274217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:35,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-12 13:12:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167175342] [2024-11-12 13:12:35,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:35,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 13:12:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 13:12:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-12 13:12:35,014 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:35,128 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2024-11-12 13:12:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:12:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-12 13:12:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:35,130 INFO L225 Difference]: With dead ends: 83 [2024-11-12 13:12:35,130 INFO L226 Difference]: Without dead ends: 83 [2024-11-12 13:12:35,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-12 13:12:35,131 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:35,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-12 13:12:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-12 13:12:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 82 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 13:12:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2024-11-12 13:12:35,140 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 18 [2024-11-12 13:12:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:35,141 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2024-11-12 13:12:35,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2024-11-12 13:12:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-12 13:12:35,142 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:35,142 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 13:12:35,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:35,342 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,SelfDestructingSolverStorable10 [2024-11-12 13:12:35,343 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:35,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1979427696, now seen corresponding path program 1 times [2024-11-12 13:12:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:35,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872439430] [2024-11-12 13:12:35,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:35,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:35,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:35,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872439430] [2024-11-12 13:12:35,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872439430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:35,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:35,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 13:12:35,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403177996] [2024-11-12 13:12:35,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:35,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 13:12:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 13:12:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:35,454 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:35,481 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2024-11-12 13:12:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:12:35,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-12 13:12:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:35,482 INFO L225 Difference]: With dead ends: 82 [2024-11-12 13:12:35,482 INFO L226 Difference]: Without dead ends: 82 [2024-11-12 13:12:35,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:35,483 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 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 13:12:35,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-12 13:12:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2024-11-12 13:12:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-11-12 13:12:35,488 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 18 [2024-11-12 13:12:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:35,489 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-11-12 13:12:35,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-11-12 13:12:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-12 13:12:35,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:35,489 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:35,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 13:12:35,490 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:35,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash -665436889, now seen corresponding path program 1 times [2024-11-12 13:12:35,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:35,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114305721] [2024-11-12 13:12:35,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:35,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:35,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114305721] [2024-11-12 13:12:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114305721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:35,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:35,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 13:12:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953487188] [2024-11-12 13:12:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:35,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 13:12:35,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 13:12:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:35,604 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:35,642 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-12 13:12:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:12:35,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-12 13:12:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:35,644 INFO L225 Difference]: With dead ends: 66 [2024-11-12 13:12:35,644 INFO L226 Difference]: Without dead ends: 66 [2024-11-12 13:12:35,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:12:35,645 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:35,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 107 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-12 13:12:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-12 13:12:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-11-12 13:12:35,651 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 19 [2024-11-12 13:12:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:35,652 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-11-12 13:12:35,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-11-12 13:12:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-12 13:12:35,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:35,652 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:35,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 13:12:35,653 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:35,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1067347243, now seen corresponding path program 1 times [2024-11-12 13:12:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199081888] [2024-11-12 13:12:35,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:35,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199081888] [2024-11-12 13:12:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199081888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:12:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93917553] [2024-11-12 13:12:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:35,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:12:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:12:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:12:35,719 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 13:12:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:35,763 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-11-12 13:12:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:12:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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) Word has length 22 [2024-11-12 13:12:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:35,764 INFO L225 Difference]: With dead ends: 62 [2024-11-12 13:12:35,764 INFO L226 Difference]: Without dead ends: 62 [2024-11-12 13:12:35,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:35,765 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:35,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 78 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-12 13:12:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-11-12 13:12:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-12 13:12:35,768 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 22 [2024-11-12 13:12:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:35,768 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-12 13:12:35,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 13:12:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-12 13:12:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-12 13:12:35,769 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:35,769 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:35,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-12 13:12:35,769 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:35,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1067347242, now seen corresponding path program 1 times [2024-11-12 13:12:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713512123] [2024-11-12 13:12:35,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:35,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:35,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713512123] [2024-11-12 13:12:35,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713512123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:35,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117387367] [2024-11-12 13:12:35,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:35,902 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 13:12:35,904 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 13:12:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:35,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-12 13:12:35,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:36,014 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-12 13:12:36,015 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 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-12 13:12:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:36,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117387367] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:36,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 13:12:36,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 20 [2024-11-12 13:12:36,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303512843] [2024-11-12 13:12:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:36,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 13:12:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 13:12:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:12:36,462 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 13:12:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:36,564 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-11-12 13:12:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:12:36,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) Word has length 22 [2024-11-12 13:12:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:36,565 INFO L225 Difference]: With dead ends: 79 [2024-11-12 13:12:36,565 INFO L226 Difference]: Without dead ends: 79 [2024-11-12 13:12:36,565 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-12 13:12:36,566 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:36,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 184 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-12 13:12:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-12 13:12:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2024-11-12 13:12:36,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 22 [2024-11-12 13:12:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:36,569 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2024-11-12 13:12:36,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 13:12:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2024-11-12 13:12:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-12 13:12:36,570 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:36,570 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:36,586 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 13:12:36,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-12 13:12:36,771 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:36,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1884995692, now seen corresponding path program 1 times [2024-11-12 13:12:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:36,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140283219] [2024-11-12 13:12:36,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140283219] [2024-11-12 13:12:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140283219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034705631] [2024-11-12 13:12:36,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:36,889 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 13:12:36,890 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 13:12:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:36,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 13:12:36,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:37,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:37,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-12 13:12:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034705631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:37,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-12 13:12:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442568647] [2024-11-12 13:12:37,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:37,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 13:12:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 13:12:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-12 13:12:37,146 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 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 13:12:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:37,228 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2024-11-12 13:12:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:12:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 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 13:12:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:37,230 INFO L225 Difference]: With dead ends: 87 [2024-11-12 13:12:37,230 INFO L226 Difference]: Without dead ends: 87 [2024-11-12 13:12:37,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-12 13:12:37,231 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:37,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 169 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-12 13:12:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2024-11-12 13:12:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-11-12 13:12:37,233 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 22 [2024-11-12 13:12:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:37,233 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-11-12 13:12:37,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 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 13:12:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-11-12 13:12:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-12 13:12:37,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:37,235 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:37,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:37,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:37,436 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:37,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:37,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1122790021, now seen corresponding path program 1 times [2024-11-12 13:12:37,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:37,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649016506] [2024-11-12 13:12:37,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649016506] [2024-11-12 13:12:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649016506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:37,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:37,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:12:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30169799] [2024-11-12 13:12:37,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:37,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:12:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:12:37,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:12:37,520 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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 13:12:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:37,577 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-11-12 13:12:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:12:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-12 13:12:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:37,578 INFO L225 Difference]: With dead ends: 66 [2024-11-12 13:12:37,578 INFO L226 Difference]: Without dead ends: 66 [2024-11-12 13:12:37,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:12:37,579 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:37,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 108 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-12 13:12:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-12 13:12:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2024-11-12 13:12:37,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2024-11-12 13:12:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:37,584 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2024-11-12 13:12:37,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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 13:12:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2024-11-12 13:12:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-12 13:12:37,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:37,586 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:37,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 13:12:37,586 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:37,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1122790020, now seen corresponding path program 1 times [2024-11-12 13:12:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:37,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940566844] [2024-11-12 13:12:37,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:37,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940566844] [2024-11-12 13:12:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940566844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387636383] [2024-11-12 13:12:37,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:37,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:37,764 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 13:12:37,766 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 13:12:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:37,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 13:12:37,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:37,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:38,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-12 13:12:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387636383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:38,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-12 13:12:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004215313] [2024-11-12 13:12:38,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:38,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 13:12:38,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 13:12:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-12 13:12:38,038 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:38,148 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-12 13:12:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:12:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-12 13:12:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:38,149 INFO L225 Difference]: With dead ends: 67 [2024-11-12 13:12:38,149 INFO L226 Difference]: Without dead ends: 67 [2024-11-12 13:12:38,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:12:38,150 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:38,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 176 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-12 13:12:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2024-11-12 13:12:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.180327868852459) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-11-12 13:12:38,153 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 26 [2024-11-12 13:12:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:38,154 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-11-12 13:12:38,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-11-12 13:12:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-12 13:12:38,154 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:38,154 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:38,172 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 13:12:38,355 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,SelfDestructingSolverStorable17 [2024-11-12 13:12:38,355 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:38,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash -446789939, now seen corresponding path program 1 times [2024-11-12 13:12:38,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298671685] [2024-11-12 13:12:38,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 13:12:38,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:38,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298671685] [2024-11-12 13:12:38,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298671685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:38,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:38,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:12:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708530712] [2024-11-12 13:12:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:38,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:12:38,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:12:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:12:38,467 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:38,484 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-11-12 13:12:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:12:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-12 13:12:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:38,485 INFO L225 Difference]: With dead ends: 63 [2024-11-12 13:12:38,485 INFO L226 Difference]: Without dead ends: 60 [2024-11-12 13:12:38,485 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 13:12:38,486 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:38,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 58 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-12 13:12:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-12 13:12:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2024-11-12 13:12:38,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 27 [2024-11-12 13:12:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:38,488 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2024-11-12 13:12:38,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2024-11-12 13:12:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:12:38,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:38,489 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:38,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-12 13:12:38,489 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:38,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 907928992, now seen corresponding path program 1 times [2024-11-12 13:12:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497939988] [2024-11-12 13:12:38,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:38,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 13:12:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497939988] [2024-11-12 13:12:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497939988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:38,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-12 13:12:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4853129] [2024-11-12 13:12:38,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:38,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 13:12:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 13:12:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:12:38,667 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 13:12:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:38,709 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2024-11-12 13:12:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 13:12:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) Word has length 30 [2024-11-12 13:12:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:38,710 INFO L225 Difference]: With dead ends: 80 [2024-11-12 13:12:38,710 INFO L226 Difference]: Without dead ends: 47 [2024-11-12 13:12:38,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:12:38,711 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:38,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 169 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:12:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-12 13:12:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-12 13:12:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-12 13:12:38,712 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 30 [2024-11-12 13:12:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:38,713 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-12 13:12:38,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 13:12:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-12 13:12:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:12:38,713 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:38,714 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:38,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 13:12:38,714 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:38,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 398455902, now seen corresponding path program 1 times [2024-11-12 13:12:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:38,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173225601] [2024-11-12 13:12:38,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173225601] [2024-11-12 13:12:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173225601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808686841] [2024-11-12 13:12:38,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:38,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:38,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:38,940 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 13:12:38,942 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 13:12:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:39,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 13:12:39,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:39,094 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 13:12:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:39,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:39,129 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 13 treesize of output 11 [2024-11-12 13:12:39,131 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 14 treesize of output 12 [2024-11-12 13:12:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:39,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808686841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:39,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:39,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-12 13:12:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998967043] [2024-11-12 13:12:39,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:39,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:12:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:12:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:12:39,194 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:39,303 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-11-12 13:12:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 13:12:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:12:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:39,304 INFO L225 Difference]: With dead ends: 81 [2024-11-12 13:12:39,305 INFO L226 Difference]: Without dead ends: 61 [2024-11-12 13:12:39,305 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-12 13:12:39,305 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:39,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-12 13:12:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2024-11-12 13:12:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-12 13:12:39,307 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 30 [2024-11-12 13:12:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:39,308 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-12 13:12:39,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-12 13:12:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-12 13:12:39,308 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:39,308 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:39,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 13:12:39,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:39,509 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:39,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash 523411387, now seen corresponding path program 2 times [2024-11-12 13:12:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:39,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450495528] [2024-11-12 13:12:39,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:39,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450495528] [2024-11-12 13:12:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450495528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191278707] [2024-11-12 13:12:39,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:12:39,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:39,712 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 13:12:39,713 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 13:12:39,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:12:39,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:39,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 13:12:39,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:39,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:40,078 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 13:12:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191278707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:40,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:40,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-12 13:12:40,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931434617] [2024-11-12 13:12:40,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:40,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:12:40,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:12:40,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:12:40,135 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 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 13:12:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:40,311 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2024-11-12 13:12:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 13:12:40,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-12 13:12:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:40,312 INFO L225 Difference]: With dead ends: 69 [2024-11-12 13:12:40,312 INFO L226 Difference]: Without dead ends: 69 [2024-11-12 13:12:40,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-12 13:12:40,313 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:40,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 196 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-12 13:12:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2024-11-12 13:12:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.140625) internal successors, (73), 65 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 13:12:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2024-11-12 13:12:40,316 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 34 [2024-11-12 13:12:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:40,316 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2024-11-12 13:12:40,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 20 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 13:12:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2024-11-12 13:12:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-12 13:12:40,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:40,317 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:40,333 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 13:12:40,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-12 13:12:40,517 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:40,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash -954030269, now seen corresponding path program 1 times [2024-11-12 13:12:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432793836] [2024-11-12 13:12:40,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 13:12:40,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432793836] [2024-11-12 13:12:40,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432793836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:12:40,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:12:40,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-12 13:12:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033138448] [2024-11-12 13:12:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:12:40,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 13:12:40,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 13:12:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-12 13:12:40,734 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 13:12:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:40,827 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-11-12 13:12:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:12:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 35 [2024-11-12 13:12:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:40,827 INFO L225 Difference]: With dead ends: 89 [2024-11-12 13:12:40,828 INFO L226 Difference]: Without dead ends: 89 [2024-11-12 13:12:40,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-12 13:12:40,828 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:40,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 190 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-12 13:12:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-11-12 13:12:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:12:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-11-12 13:12:40,831 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 35 [2024-11-12 13:12:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:40,831 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-11-12 13:12:40,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 13:12:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-11-12 13:12:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-12 13:12:40,832 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:40,832 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:40,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-12 13:12:40,832 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:40,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash -679270655, now seen corresponding path program 1 times [2024-11-12 13:12:40,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:40,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075236804] [2024-11-12 13:12:40,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:41,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:41,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075236804] [2024-11-12 13:12:41,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075236804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:41,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37423429] [2024-11-12 13:12:41,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:41,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:41,168 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 13:12:41,169 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 13:12:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:41,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 13:12:41,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:41,329 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 13:12:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:41,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:41,404 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 13 treesize of output 11 [2024-11-12 13:12:41,407 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 14 treesize of output 12 [2024-11-12 13:12:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37423429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:41,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:41,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 20 [2024-11-12 13:12:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979424304] [2024-11-12 13:12:41,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:41,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:12:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:12:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:12:41,481 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 13:12:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:41,701 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2024-11-12 13:12:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 13:12:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) Word has length 35 [2024-11-12 13:12:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:41,702 INFO L225 Difference]: With dead ends: 118 [2024-11-12 13:12:41,702 INFO L226 Difference]: Without dead ends: 118 [2024-11-12 13:12:41,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:12:41,703 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:41,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 255 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:12:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-12 13:12:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2024-11-12 13:12:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 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 13:12:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2024-11-12 13:12:41,706 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 35 [2024-11-12 13:12:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:41,707 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2024-11-12 13:12:41,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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 13:12:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2024-11-12 13:12:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-12 13:12:41,707 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:41,707 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:41,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 13:12:41,911 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,SelfDestructingSolverStorable23 [2024-11-12 13:12:41,912 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:41,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1716883972, now seen corresponding path program 2 times [2024-11-12 13:12:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223610334] [2024-11-12 13:12:41,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:42,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223610334] [2024-11-12 13:12:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223610334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581106686] [2024-11-12 13:12:42,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:12:42,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:42,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:42,242 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 13:12:42,243 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 13:12:42,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:12:42,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:42,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 13:12:42,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:42,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:42,697 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 13:12:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581106686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:42,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2024-11-12 13:12:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131789847] [2024-11-12 13:12:42,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:42,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 13:12:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 13:12:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-12 13:12:42,748 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:43,108 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-11-12 13:12:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 13:12:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-12 13:12:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:43,109 INFO L225 Difference]: With dead ends: 111 [2024-11-12 13:12:43,109 INFO L226 Difference]: Without dead ends: 111 [2024-11-12 13:12:43,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2024-11-12 13:12:43,110 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:43,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 338 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-12 13:12:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2024-11-12 13:12:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.13) internal successors, (113), 101 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 13:12:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2024-11-12 13:12:43,112 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 39 [2024-11-12 13:12:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:43,113 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2024-11-12 13:12:43,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2024-11-12 13:12:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-12 13:12:43,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:43,114 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:43,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 13:12:43,317 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,SelfDestructingSolverStorable24 [2024-11-12 13:12:43,318 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:43,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 173686149, now seen corresponding path program 3 times [2024-11-12 13:12:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:43,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418875947] [2024-11-12 13:12:43,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:43,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418875947] [2024-11-12 13:12:43,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418875947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:43,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822575218] [2024-11-12 13:12:43,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:12:43,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:43,646 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 13:12:43,648 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 13:12:43,796 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 13:12:43,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:43,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 13:12:43,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:43,917 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 13:12:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:44,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:44,035 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 13:12:44,037 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 13:12:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:44,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822575218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:44,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:44,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 25 [2024-11-12 13:12:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888189253] [2024-11-12 13:12:44,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:44,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 13:12:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 13:12:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-12 13:12:44,116 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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 13:12:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:44,343 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2024-11-12 13:12:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 13:12:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) Word has length 42 [2024-11-12 13:12:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:44,344 INFO L225 Difference]: With dead ends: 173 [2024-11-12 13:12:44,345 INFO L226 Difference]: Without dead ends: 147 [2024-11-12 13:12:44,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:12:44,345 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:44,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 446 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-12 13:12:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2024-11-12 13:12:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 139 states have internal predecessors, (154), 0 states have call successors, (0), 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 13:12:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-11-12 13:12:44,349 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 42 [2024-11-12 13:12:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:44,349 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-11-12 13:12:44,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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 13:12:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-11-12 13:12:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-12 13:12:44,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:44,350 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:44,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 13:12:44,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-12 13:12:44,555 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:44,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1917761142, now seen corresponding path program 3 times [2024-11-12 13:12:44,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:44,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746732585] [2024-11-12 13:12:44,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746732585] [2024-11-12 13:12:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746732585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865185825] [2024-11-12 13:12:44,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:12:44,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:45,000 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 13:12:45,002 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 13:12:45,105 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 13:12:45,105 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:45,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-12 13:12:45,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:45,133 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 13:12:45,384 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 13:12:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:12:45,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-12 13:12:45,785 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 13:12:45,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:46,062 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 13 treesize of output 11 [2024-11-12 13:12:46,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-12 13:12:46,534 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 13:12:46,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865185825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:46,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:46,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2024-11-12 13:12:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626676754] [2024-11-12 13:12:46,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:46,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 13:12:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 13:12:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 13:12:46,536 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 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 13:12:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:47,622 INFO L93 Difference]: Finished difference Result 212 states and 228 transitions. [2024-11-12 13:12:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 13:12:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-12 13:12:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:47,624 INFO L225 Difference]: With dead ends: 212 [2024-11-12 13:12:47,624 INFO L226 Difference]: Without dead ends: 195 [2024-11-12 13:12:47,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2024-11-12 13:12:47,626 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:47,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 439 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:12:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-12 13:12:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 180. [2024-11-12 13:12:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.1123595505617978) internal successors, (198), 179 states have internal predecessors, (198), 0 states have call successors, (0), 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 13:12:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 198 transitions. [2024-11-12 13:12:47,634 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 198 transitions. Word has length 44 [2024-11-12 13:12:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:47,635 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 198 transitions. [2024-11-12 13:12:47,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.736842105263158) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 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 13:12:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 198 transitions. [2024-11-12 13:12:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-12 13:12:47,636 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:47,636 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:47,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 13:12:47,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:47,841 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:47,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1581398686, now seen corresponding path program 4 times [2024-11-12 13:12:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:47,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806335990] [2024-11-12 13:12:47,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:47,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:12:48,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806335990] [2024-11-12 13:12:48,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806335990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:48,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009809231] [2024-11-12 13:12:48,129 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:12:48,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:48,131 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 13:12:48,133 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 13:12:48,234 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:12:48,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:48,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-12 13:12:48,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:48,355 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 13:12:48,728 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-12 13:12:48,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-11-12 13:12:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-12 13:12:48,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:49,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-12 13:12:49,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-11-12 13:12:49,632 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 13:12:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-12 13:12:49,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009809231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:49,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 37 [2024-11-12 13:12:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348203090] [2024-11-12 13:12:49,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:49,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 13:12:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 13:12:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 13:12:49,655 INFO L87 Difference]: Start difference. First operand 180 states and 198 transitions. Second operand has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 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 13:12:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:50,709 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2024-11-12 13:12:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 13:12:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-12 13:12:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:50,710 INFO L225 Difference]: With dead ends: 189 [2024-11-12 13:12:50,710 INFO L226 Difference]: Without dead ends: 110 [2024-11-12 13:12:50,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=398, Invalid=3142, Unknown=0, NotChecked=0, Total=3540 [2024-11-12 13:12:50,711 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:50,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 543 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:12:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-12 13:12:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2024-11-12 13:12:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2024-11-12 13:12:50,715 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 46 [2024-11-12 13:12:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:50,715 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2024-11-12 13:12:50,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 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 13:12:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2024-11-12 13:12:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-12 13:12:50,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:50,716 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:50,733 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 13:12:50,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 13:12:50,917 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:50,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash -18809133, now seen corresponding path program 4 times [2024-11-12 13:12:50,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816469869] [2024-11-12 13:12:50,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:50,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:51,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:51,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816469869] [2024-11-12 13:12:51,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816469869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:51,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479824268] [2024-11-12 13:12:51,258 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:12:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:51,259 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 13:12:51,260 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 13:12:51,352 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:12:51,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:51,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 13:12:51,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:51,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:51,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:12:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:51,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479824268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:51,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:51,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2024-11-12 13:12:51,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497369585] [2024-11-12 13:12:51,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:51,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 13:12:51,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 13:12:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-12 13:12:51,707 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:12:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:51,980 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2024-11-12 13:12:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 13:12:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-12 13:12:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:51,981 INFO L225 Difference]: With dead ends: 107 [2024-11-12 13:12:51,981 INFO L226 Difference]: Without dead ends: 107 [2024-11-12 13:12:51,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 13:12:51,982 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:51,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 369 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-12 13:12:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2024-11-12 13:12:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 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 13:12:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2024-11-12 13:12:51,985 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 48 [2024-11-12 13:12:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:51,985 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2024-11-12 13:12:51,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:12:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2024-11-12 13:12:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-12 13:12:51,986 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:51,986 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:51,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:52,186 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,SelfDestructingSolverStorable28 [2024-11-12 13:12:52,186 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:52,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 625079047, now seen corresponding path program 5 times [2024-11-12 13:12:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135362207] [2024-11-12 13:12:52,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:12:53,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135362207] [2024-11-12 13:12:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135362207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833043737] [2024-11-12 13:12:53,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:12:53,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:53,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:53,483 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 13:12:53,484 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 13:12:53,580 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-12 13:12:53,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:53,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-12 13:12:53,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:53,729 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 13:12:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:53,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:53,949 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 13:12:53,951 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 13:12:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833043737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:54,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 35 [2024-11-12 13:12:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016207349] [2024-11-12 13:12:54,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:54,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-12 13:12:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-12 13:12:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2024-11-12 13:12:54,028 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:55,216 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2024-11-12 13:12:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-12 13:12:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-12 13:12:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:55,218 INFO L225 Difference]: With dead ends: 166 [2024-11-12 13:12:55,218 INFO L226 Difference]: Without dead ends: 114 [2024-11-12 13:12:55,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=3173, Unknown=0, NotChecked=0, Total=3422 [2024-11-12 13:12:55,219 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:55,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 718 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-12 13:12:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-12 13:12:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2024-11-12 13:12:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0865384615384615) internal successors, (113), 104 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 13:12:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2024-11-12 13:12:55,223 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 53 [2024-11-12 13:12:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:55,224 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2024-11-12 13:12:55,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2024-11-12 13:12:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-12 13:12:55,224 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:55,225 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:55,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-12 13:12:55,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:55,425 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:55,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 57590602, now seen corresponding path program 6 times [2024-11-12 13:12:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065318360] [2024-11-12 13:12:55,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:55,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065318360] [2024-11-12 13:12:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065318360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342326007] [2024-11-12 13:12:55,769 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:12:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:55,771 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 13:12:55,772 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 13:12:56,000 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-12 13:12:56,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:56,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-12 13:12:56,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:56,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:56,408 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 21 treesize of output 17 [2024-11-12 13:12:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342326007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:56,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:56,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-11-12 13:12:56,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499811037] [2024-11-12 13:12:56,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:56,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-12 13:12:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-12 13:12:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2024-11-12 13:12:56,580 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 37 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:56,901 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2024-11-12 13:12:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 13:12:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-12 13:12:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:56,902 INFO L225 Difference]: With dead ends: 129 [2024-11-12 13:12:56,902 INFO L226 Difference]: Without dead ends: 129 [2024-11-12 13:12:56,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2024-11-12 13:12:56,903 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 126 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:56,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 391 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-12 13:12:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2024-11-12 13:12:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.087719298245614) internal successors, (124), 114 states have internal predecessors, (124), 0 states have call successors, (0), 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 13:12:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2024-11-12 13:12:56,906 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 57 [2024-11-12 13:12:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:56,906 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2024-11-12 13:12:56,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.7777777777777777) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2024-11-12 13:12:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-12 13:12:56,907 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:56,907 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:56,921 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 13:12:57,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:57,107 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:57,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 834625776, now seen corresponding path program 7 times [2024-11-12 13:12:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991474889] [2024-11-12 13:12:57,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:57,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991474889] [2024-11-12 13:12:57,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991474889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033186315] [2024-11-12 13:12:57,582 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:12:57,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:57,584 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 13:12:57,585 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 13:12:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:57,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-12 13:12:57,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:57,802 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 13:12:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:57,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:57,908 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 13:12:57,910 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 13:12:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033186315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:57,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 32 [2024-11-12 13:12:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739858441] [2024-11-12 13:12:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:57,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-12 13:12:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-12 13:12:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2024-11-12 13:12:57,972 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 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 13:12:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:12:58,384 INFO L93 Difference]: Finished difference Result 195 states and 208 transitions. [2024-11-12 13:12:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-12 13:12:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 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 62 [2024-11-12 13:12:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:12:58,386 INFO L225 Difference]: With dead ends: 195 [2024-11-12 13:12:58,386 INFO L226 Difference]: Without dead ends: 129 [2024-11-12 13:12:58,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1888, Unknown=0, NotChecked=0, Total=2070 [2024-11-12 13:12:58,387 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:12:58,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 665 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:12:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-12 13:12:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2024-11-12 13:12:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0819672131147542) internal successors, (132), 122 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:12:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2024-11-12 13:12:58,390 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 62 [2024-11-12 13:12:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:12:58,390 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2024-11-12 13:12:58,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 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 13:12:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2024-11-12 13:12:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-12 13:12:58,391 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:12:58,391 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:12:58,405 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 13:12:58,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:58,592 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:12:58,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:12:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash 540355597, now seen corresponding path program 8 times [2024-11-12 13:12:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:12:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855024468] [2024-11-12 13:12:58,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:12:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:12:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:12:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:59,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:12:59,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855024468] [2024-11-12 13:12:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855024468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:12:59,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711148781] [2024-11-12 13:12:59,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:12:59,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:12:59,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:12:59,118 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 13:12:59,119 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 13:12:59,246 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:12:59,246 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:12:59,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-12 13:12:59,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:12:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:59,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:12:59,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:12:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:12:59,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711148781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:12:59,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:12:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-11-12 13:12:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625954148] [2024-11-12 13:12:59,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:12:59,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-12 13:12:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:12:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-12 13:12:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2024-11-12 13:12:59,860 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 37 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 37 states have internal predecessors, (128), 0 states have call successors, (0), 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 13:13:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:00,381 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2024-11-12 13:13:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 13:13:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 37 states have internal predecessors, (128), 0 states have call successors, (0), 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 66 [2024-11-12 13:13:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:00,382 INFO L225 Difference]: With dead ends: 151 [2024-11-12 13:13:00,382 INFO L226 Difference]: Without dead ends: 151 [2024-11-12 13:13:00,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2024-11-12 13:13:00,384 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 116 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:00,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 682 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:13:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-12 13:13:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2024-11-12 13:13:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 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 13:13:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2024-11-12 13:13:00,387 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 66 [2024-11-12 13:13:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:00,388 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2024-11-12 13:13:00,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 37 states have internal predecessors, (128), 0 states have call successors, (0), 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 13:13:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2024-11-12 13:13:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-12 13:13:00,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:00,389 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:00,406 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 13:13:00,589 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,SelfDestructingSolverStorable32 [2024-11-12 13:13:00,589 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:00,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -444925427, now seen corresponding path program 9 times [2024-11-12 13:13:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943293060] [2024-11-12 13:13:00,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943293060] [2024-11-12 13:13:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943293060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867217759] [2024-11-12 13:13:01,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:01,136 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 13:13:01,137 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 13:13:01,298 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-12 13:13:01,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:01,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-12 13:13:01,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:01,449 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 13:13:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:01,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:01,727 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 13:13:01,729 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 13:13:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:01,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867217759] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:01,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:01,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 41 [2024-11-12 13:13:01,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603172269] [2024-11-12 13:13:01,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:01,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-12 13:13:01,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-12 13:13:01,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2024-11-12 13:13:01,900 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 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 13:13:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:02,448 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2024-11-12 13:13:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 13:13:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 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 13:13:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:02,449 INFO L225 Difference]: With dead ends: 227 [2024-11-12 13:13:02,449 INFO L226 Difference]: Without dead ends: 147 [2024-11-12 13:13:02,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=2651, Unknown=0, NotChecked=0, Total=2862 [2024-11-12 13:13:02,450 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 118 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:02,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1164 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:13:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-12 13:13:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2024-11-12 13:13:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0785714285714285) internal successors, (151), 140 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 13:13:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2024-11-12 13:13:02,453 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 71 [2024-11-12 13:13:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:02,453 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2024-11-12 13:13:02,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 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 13:13:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2024-11-12 13:13:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-12 13:13:02,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:02,455 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:02,468 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 13:13:02,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-12 13:13:02,655 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:02,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1403740048, now seen corresponding path program 10 times [2024-11-12 13:13:02,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:02,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98737670] [2024-11-12 13:13:02,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:02,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98737670] [2024-11-12 13:13:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98737670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421764267] [2024-11-12 13:13:03,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:03,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:03,233 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 13:13:03,234 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 13:13:03,358 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:03,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:03,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-12 13:13:03,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:03,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:04,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421764267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:04,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2024-11-12 13:13:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187709862] [2024-11-12 13:13:04,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:04,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-12 13:13:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-12 13:13:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2024-11-12 13:13:04,103 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 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 13:13:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:04,682 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2024-11-12 13:13:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 13:13:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 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 13:13:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:04,683 INFO L225 Difference]: With dead ends: 173 [2024-11-12 13:13:04,683 INFO L226 Difference]: Without dead ends: 173 [2024-11-12 13:13:04,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=2439, Unknown=0, NotChecked=0, Total=2756 [2024-11-12 13:13:04,685 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:04,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 758 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:13:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-12 13:13:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2024-11-12 13:13:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.08) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 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 13:13:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2024-11-12 13:13:04,688 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 75 [2024-11-12 13:13:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:04,688 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2024-11-12 13:13:04,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 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 13:13:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2024-11-12 13:13:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-12 13:13:04,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:04,689 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:04,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:04,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:04,890 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:04,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1383563370, now seen corresponding path program 11 times [2024-11-12 13:13:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:04,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463086848] [2024-11-12 13:13:04,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:05,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463086848] [2024-11-12 13:13:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463086848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637366615] [2024-11-12 13:13:05,639 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:13:05,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:05,640 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 13:13:05,643 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 13:13:05,813 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-12 13:13:05,813 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:05,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-12 13:13:05,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:06,033 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 13:13:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:06,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:06,185 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 13:13:06,187 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 13:13:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637366615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:06,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:06,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 38 [2024-11-12 13:13:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650099756] [2024-11-12 13:13:06,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:06,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 13:13:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 13:13:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 13:13:06,266 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 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 13:13:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:06,904 INFO L93 Difference]: Finished difference Result 259 states and 276 transitions. [2024-11-12 13:13:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-12 13:13:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 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 80 [2024-11-12 13:13:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:06,905 INFO L225 Difference]: With dead ends: 259 [2024-11-12 13:13:06,905 INFO L226 Difference]: Without dead ends: 165 [2024-11-12 13:13:06,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=2858, Unknown=0, NotChecked=0, Total=3080 [2024-11-12 13:13:06,907 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 85 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:06,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1198 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:13:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-12 13:13:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2024-11-12 13:13:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0759493670886076) internal successors, (170), 158 states have internal predecessors, (170), 0 states have call successors, (0), 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 13:13:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2024-11-12 13:13:06,910 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 80 [2024-11-12 13:13:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:06,910 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2024-11-12 13:13:06,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 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 13:13:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2024-11-12 13:13:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-12 13:13:06,911 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:06,911 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:06,928 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 13:13:07,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:07,116 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:07,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash -713187769, now seen corresponding path program 12 times [2024-11-12 13:13:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:07,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009485332] [2024-11-12 13:13:07,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:07,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:07,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009485332] [2024-11-12 13:13:07,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009485332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:07,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171381638] [2024-11-12 13:13:07,807 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:13:07,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:07,809 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 13:13:07,811 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 13:13:08,096 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-12 13:13:08,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:08,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-12 13:13:08,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:08,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:08,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171381638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:09,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:09,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-11-12 13:13:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041306693] [2024-11-12 13:13:09,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:09,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-12 13:13:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-12 13:13:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2336, Unknown=0, NotChecked=0, Total=2652 [2024-11-12 13:13:09,149 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 52 states, 51 states have (on average 3.803921568627451) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 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 13:13:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:09,847 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2024-11-12 13:13:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-12 13:13:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.803921568627451) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 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 84 [2024-11-12 13:13:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:09,848 INFO L225 Difference]: With dead ends: 195 [2024-11-12 13:13:09,848 INFO L226 Difference]: Without dead ends: 195 [2024-11-12 13:13:09,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=584, Invalid=4108, Unknown=0, NotChecked=0, Total=4692 [2024-11-12 13:13:09,849 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 220 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:09,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 849 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:13:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-12 13:13:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2024-11-12 13:13:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0773809523809523) internal successors, (181), 168 states have internal predecessors, (181), 0 states have call successors, (0), 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 13:13:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2024-11-12 13:13:09,852 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 84 [2024-11-12 13:13:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:09,853 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2024-11-12 13:13:09,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.803921568627451) internal successors, (194), 52 states have internal predecessors, (194), 0 states have call successors, (0), 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 13:13:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2024-11-12 13:13:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-12 13:13:09,853 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:09,853 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:09,867 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 13:13:10,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-12 13:13:10,054 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:10,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash 681761811, now seen corresponding path program 13 times [2024-11-12 13:13:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686122790] [2024-11-12 13:13:10,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686122790] [2024-11-12 13:13:10,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686122790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148248126] [2024-11-12 13:13:10,820 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:13:10,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:10,822 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 13:13:10,823 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 13:13:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:10,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-12 13:13:10,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:11,163 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 13:13:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:11,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:11,311 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 13:13:11,312 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 13:13:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148248126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:11,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:11,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 41 [2024-11-12 13:13:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332319320] [2024-11-12 13:13:11,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:11,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-12 13:13:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-12 13:13:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-11-12 13:13:11,394 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:12,251 INFO L93 Difference]: Finished difference Result 291 states and 310 transitions. [2024-11-12 13:13:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 13:13:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-12 13:13:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:12,253 INFO L225 Difference]: With dead ends: 291 [2024-11-12 13:13:12,253 INFO L226 Difference]: Without dead ends: 183 [2024-11-12 13:13:12,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2024-11-12 13:13:12,254 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 132 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:12,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1841 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:13:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-12 13:13:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2024-11-12 13:13:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0738636363636365) internal successors, (189), 176 states have internal predecessors, (189), 0 states have call successors, (0), 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 13:13:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 189 transitions. [2024-11-12 13:13:12,261 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 189 transitions. Word has length 89 [2024-11-12 13:13:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:12,261 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 189 transitions. [2024-11-12 13:13:12,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 189 transitions. [2024-11-12 13:13:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-12 13:13:12,262 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:12,262 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:12,278 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 13:13:12,466 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,SelfDestructingSolverStorable37 [2024-11-12 13:13:12,467 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:12,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -510392618, now seen corresponding path program 14 times [2024-11-12 13:13:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:12,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766593882] [2024-11-12 13:13:12,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 72 proven. 167 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:13,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:13,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766593882] [2024-11-12 13:13:13,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766593882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:13,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248183839] [2024-11-12 13:13:13,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:13,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:13,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:13,166 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 13:13:13,167 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 13:13:13,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:13,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:13,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-12 13:13:13,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:13,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:14,031 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 13:13:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248183839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:14,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:14,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 47 [2024-11-12 13:13:14,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048540027] [2024-11-12 13:13:14,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:14,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-12 13:13:14,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-12 13:13:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2024-11-12 13:13:14,178 INFO L87 Difference]: Start difference. First operand 177 states and 189 transitions. Second operand has 48 states, 47 states have (on average 3.872340425531915) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 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 13:13:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:15,000 INFO L93 Difference]: Finished difference Result 217 states and 230 transitions. [2024-11-12 13:13:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 13:13:15,000 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.872340425531915) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-12 13:13:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:15,001 INFO L225 Difference]: With dead ends: 217 [2024-11-12 13:13:15,001 INFO L226 Difference]: Without dead ends: 217 [2024-11-12 13:13:15,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=476, Invalid=3946, Unknown=0, NotChecked=0, Total=4422 [2024-11-12 13:13:15,002 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 266 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:15,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1223 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:13:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-12 13:13:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2024-11-12 13:13:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.075268817204301) internal successors, (200), 186 states have internal predecessors, (200), 0 states have call successors, (0), 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 13:13:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 200 transitions. [2024-11-12 13:13:15,007 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 200 transitions. Word has length 93 [2024-11-12 13:13:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:15,007 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 200 transitions. [2024-11-12 13:13:15,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.872340425531915) internal successors, (182), 48 states have internal predecessors, (182), 0 states have call successors, (0), 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 13:13:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 200 transitions. [2024-11-12 13:13:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-12 13:13:15,008 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:15,008 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:15,024 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 13:13:15,209 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,SelfDestructingSolverStorable38 [2024-11-12 13:13:15,209 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:15,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1504545564, now seen corresponding path program 15 times [2024-11-12 13:13:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:15,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442635838] [2024-11-12 13:13:15,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:15,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442635838] [2024-11-12 13:13:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442635838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:16,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645319430] [2024-11-12 13:13:16,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:16,003 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 13:13:16,004 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 13:13:16,190 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-12 13:13:16,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:16,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-12 13:13:16,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:16,359 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 13:13:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:16,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:16,740 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 13:13:16,742 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 13:13:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645319430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:17,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 53 [2024-11-12 13:13:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831421469] [2024-11-12 13:13:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:17,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-12 13:13:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-12 13:13:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2024-11-12 13:13:17,056 INFO L87 Difference]: Start difference. First operand 187 states and 200 transitions. Second operand has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 states have internal predecessors, (187), 0 states have call successors, (0), 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 13:13:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:17,953 INFO L93 Difference]: Finished difference Result 323 states and 344 transitions. [2024-11-12 13:13:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-12 13:13:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 states have internal predecessors, (187), 0 states have call successors, (0), 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 98 [2024-11-12 13:13:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:17,954 INFO L225 Difference]: With dead ends: 323 [2024-11-12 13:13:17,954 INFO L226 Difference]: Without dead ends: 201 [2024-11-12 13:13:17,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=4829, Unknown=0, NotChecked=0, Total=5112 [2024-11-12 13:13:17,955 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 190 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:17,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 2110 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-12 13:13:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-12 13:13:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 195. [2024-11-12 13:13:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 0 states have call successors, (0), 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 13:13:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 208 transitions. [2024-11-12 13:13:17,959 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 208 transitions. Word has length 98 [2024-11-12 13:13:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:17,960 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 208 transitions. [2024-11-12 13:13:17,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.5283018867924527) internal successors, (187), 53 states have internal predecessors, (187), 0 states have call successors, (0), 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 13:13:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 208 transitions. [2024-11-12 13:13:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-12 13:13:17,961 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:17,961 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:17,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:18,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-12 13:13:18,164 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:18,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1929267839, now seen corresponding path program 16 times [2024-11-12 13:13:18,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:18,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381859724] [2024-11-12 13:13:18,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 98 proven. 211 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:18,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381859724] [2024-11-12 13:13:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381859724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147565315] [2024-11-12 13:13:18,795 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:18,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:18,797 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:18,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-12 13:13:18,993 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:18,993 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:18,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-12 13:13:18,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:19,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:19,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147565315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:19,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2024-11-12 13:13:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966138876] [2024-11-12 13:13:19,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:19,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-12 13:13:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-12 13:13:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2024-11-12 13:13:19,925 INFO L87 Difference]: Start difference. First operand 195 states and 208 transitions. Second operand has 51 states, 50 states have (on average 4.12) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 13:13:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:20,847 INFO L93 Difference]: Finished difference Result 239 states and 253 transitions. [2024-11-12 13:13:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 13:13:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.12) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 102 [2024-11-12 13:13:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:20,848 INFO L225 Difference]: With dead ends: 239 [2024-11-12 13:13:20,848 INFO L226 Difference]: Without dead ends: 239 [2024-11-12 13:13:20,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2024-11-12 13:13:20,849 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 225 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:20,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1273 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-12 13:13:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-12 13:13:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2024-11-12 13:13:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0735294117647058) internal successors, (219), 204 states have internal predecessors, (219), 0 states have call successors, (0), 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 13:13:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 219 transitions. [2024-11-12 13:13:20,855 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 219 transitions. Word has length 102 [2024-11-12 13:13:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:20,855 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 219 transitions. [2024-11-12 13:13:20,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.12) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 13:13:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 219 transitions. [2024-11-12 13:13:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-12 13:13:20,856 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:20,856 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:20,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-12 13:13:21,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:21,057 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:21,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash 638466329, now seen corresponding path program 17 times [2024-11-12 13:13:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955063074] [2024-11-12 13:13:21,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:21,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955063074] [2024-11-12 13:13:21,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955063074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:21,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275420563] [2024-11-12 13:13:21,887 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:13:21,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:21,889 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:21,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-12 13:13:22,074 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-12 13:13:22,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:22,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-12 13:13:22,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:22,398 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 13:13:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:22,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:22,574 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 13:13:22,575 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 13:13:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:22,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275420563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:22,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:22,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 47 [2024-11-12 13:13:22,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353061738] [2024-11-12 13:13:22,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:22,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-12 13:13:22,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-12 13:13:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2024-11-12 13:13:22,668 INFO L87 Difference]: Start difference. First operand 205 states and 219 transitions. Second operand has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 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 13:13:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:23,895 INFO L93 Difference]: Finished difference Result 355 states and 378 transitions. [2024-11-12 13:13:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-12 13:13:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 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 13:13:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:23,896 INFO L225 Difference]: With dead ends: 355 [2024-11-12 13:13:23,896 INFO L226 Difference]: Without dead ends: 219 [2024-11-12 13:13:23,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=282, Invalid=4688, Unknown=0, NotChecked=0, Total=4970 [2024-11-12 13:13:23,897 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 174 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:23,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2689 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:13:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-12 13:13:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2024-11-12 13:13:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.070754716981132) internal successors, (227), 212 states have internal predecessors, (227), 0 states have call successors, (0), 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 13:13:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 227 transitions. [2024-11-12 13:13:23,901 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 227 transitions. Word has length 107 [2024-11-12 13:13:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:23,901 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 227 transitions. [2024-11-12 13:13:23,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4468085106382977) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 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 13:13:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 227 transitions. [2024-11-12 13:13:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-12 13:13:23,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:23,902 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:23,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:24,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:24,103 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:24,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2121180900, now seen corresponding path program 18 times [2024-11-12 13:13:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91379283] [2024-11-12 13:13:24,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 260 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91379283] [2024-11-12 13:13:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91379283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55511349] [2024-11-12 13:13:25,070 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:13:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:25,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:25,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:25,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-12 13:13:25,497 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-12 13:13:25,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:25,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-12 13:13:25,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:26,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:26,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55511349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:26,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:26,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2024-11-12 13:13:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416199158] [2024-11-12 13:13:26,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:26,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-12 13:13:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-12 13:13:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=3872, Unknown=0, NotChecked=0, Total=4422 [2024-11-12 13:13:26,952 INFO L87 Difference]: Start difference. First operand 213 states and 227 transitions. Second operand has 67 states, 66 states have (on average 3.984848484848485) internal successors, (263), 67 states have internal predecessors, (263), 0 states have call successors, (0), 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 13:13:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:27,910 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2024-11-12 13:13:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-12 13:13:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.984848484848485) internal successors, (263), 67 states have internal predecessors, (263), 0 states have call successors, (0), 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 111 [2024-11-12 13:13:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:27,912 INFO L225 Difference]: With dead ends: 261 [2024-11-12 13:13:27,912 INFO L226 Difference]: Without dead ends: 261 [2024-11-12 13:13:27,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 171 SyntacticMatches, 11 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=986, Invalid=7024, Unknown=0, NotChecked=0, Total=8010 [2024-11-12 13:13:27,913 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 209 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:27,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1161 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 13:13:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-12 13:13:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2024-11-12 13:13:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.072072072072072) internal successors, (238), 222 states have internal predecessors, (238), 0 states have call successors, (0), 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 13:13:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2024-11-12 13:13:27,918 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 111 [2024-11-12 13:13:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:27,918 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2024-11-12 13:13:27,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.984848484848485) internal successors, (263), 67 states have internal predecessors, (263), 0 states have call successors, (0), 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 13:13:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2024-11-12 13:13:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-12 13:13:27,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:27,919 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:27,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:28,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-12 13:13:28,121 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:28,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -515137954, now seen corresponding path program 19 times [2024-11-12 13:13:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882802350] [2024-11-12 13:13:28,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:29,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882802350] [2024-11-12 13:13:29,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882802350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:29,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888320065] [2024-11-12 13:13:29,067 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:13:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:29,068 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:29,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-12 13:13:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:29,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-12 13:13:29,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:29,517 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 13:13:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:29,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:29,703 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 13:13:29,706 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 13:13:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888320065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:29,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:29,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 50 [2024-11-12 13:13:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038535333] [2024-11-12 13:13:29,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:29,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-12 13:13:29,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:29,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-12 13:13:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2024-11-12 13:13:29,809 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 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 13:13:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:31,057 INFO L93 Difference]: Finished difference Result 387 states and 412 transitions. [2024-11-12 13:13:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-12 13:13:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 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 116 [2024-11-12 13:13:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:31,059 INFO L225 Difference]: With dead ends: 387 [2024-11-12 13:13:31,059 INFO L226 Difference]: Without dead ends: 237 [2024-11-12 13:13:31,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=5398, Unknown=0, NotChecked=0, Total=5700 [2024-11-12 13:13:31,060 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 127 mSDsluCounter, 2660 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:31,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 2750 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 13:13:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-12 13:13:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2024-11-12 13:13:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0695652173913044) internal successors, (246), 230 states have internal predecessors, (246), 0 states have call successors, (0), 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 13:13:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 246 transitions. [2024-11-12 13:13:31,063 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 246 transitions. Word has length 116 [2024-11-12 13:13:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:31,064 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 246 transitions. [2024-11-12 13:13:31,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 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 13:13:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 246 transitions. [2024-11-12 13:13:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-12 13:13:31,065 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:31,066 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:31,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:31,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:31,266 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:31,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -735522373, now seen corresponding path program 20 times [2024-11-12 13:13:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217938642] [2024-11-12 13:13:31,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 162 proven. 314 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:32,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217938642] [2024-11-12 13:13:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217938642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:32,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147750691] [2024-11-12 13:13:32,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:32,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:32,183 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:32,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-12 13:13:32,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:32,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:32,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-12 13:13:32,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:32,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:33,405 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 21 treesize of output 17 [2024-11-12 13:13:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147750691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:33,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 72 [2024-11-12 13:13:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620141961] [2024-11-12 13:13:33,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:33,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-12 13:13:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-12 13:13:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=4580, Unknown=0, NotChecked=0, Total=5256 [2024-11-12 13:13:33,918 INFO L87 Difference]: Start difference. First operand 231 states and 246 transitions. Second operand has 73 states, 72 states have (on average 4.027777777777778) internal successors, (290), 73 states have internal predecessors, (290), 0 states have call successors, (0), 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 13:13:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:35,293 INFO L93 Difference]: Finished difference Result 283 states and 299 transitions. [2024-11-12 13:13:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-12 13:13:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.027777777777778) internal successors, (290), 73 states have internal predecessors, (290), 0 states have call successors, (0), 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 120 [2024-11-12 13:13:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:35,295 INFO L225 Difference]: With dead ends: 283 [2024-11-12 13:13:35,295 INFO L226 Difference]: Without dead ends: 283 [2024-11-12 13:13:35,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1047, Invalid=8459, Unknown=0, NotChecked=0, Total=9506 [2024-11-12 13:13:35,297 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 346 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:35,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1980 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-12 13:13:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-12 13:13:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 241. [2024-11-12 13:13:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0708333333333333) internal successors, (257), 240 states have internal predecessors, (257), 0 states have call successors, (0), 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 13:13:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 257 transitions. [2024-11-12 13:13:35,301 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 257 transitions. Word has length 120 [2024-11-12 13:13:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:35,301 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 257 transitions. [2024-11-12 13:13:35,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.027777777777778) internal successors, (290), 73 states have internal predecessors, (290), 0 states have call successors, (0), 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 13:13:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 257 transitions. [2024-11-12 13:13:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-12 13:13:35,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:35,303 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:35,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:35,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:35,503 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:35,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1777447199, now seen corresponding path program 21 times [2024-11-12 13:13:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237604893] [2024-11-12 13:13:35,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237604893] [2024-11-12 13:13:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237604893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632285639] [2024-11-12 13:13:36,578 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:36,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:36,580 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:36,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-12 13:13:36,866 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-12 13:13:36,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:36,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-12 13:13:36,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:37,077 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 13:13:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:37,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:37,597 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 13:13:37,600 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 13:13:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632285639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:38,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:38,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 32] total 65 [2024-11-12 13:13:38,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177137593] [2024-11-12 13:13:38,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:38,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-12 13:13:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-12 13:13:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3965, Unknown=0, NotChecked=0, Total=4160 [2024-11-12 13:13:38,004 INFO L87 Difference]: Start difference. First operand 241 states and 257 transitions. Second operand has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 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 13:13:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:39,788 INFO L93 Difference]: Finished difference Result 419 states and 446 transitions. [2024-11-12 13:13:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-12 13:13:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 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 125 [2024-11-12 13:13:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:39,790 INFO L225 Difference]: With dead ends: 419 [2024-11-12 13:13:39,790 INFO L226 Difference]: Without dead ends: 255 [2024-11-12 13:13:39,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=355, Invalid=7655, Unknown=0, NotChecked=0, Total=8010 [2024-11-12 13:13:39,792 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 220 mSDsluCounter, 3955 mSDsCounter, 0 mSdLazyCounter, 3377 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 4053 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:39,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 4053 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3377 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-12 13:13:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-12 13:13:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2024-11-12 13:13:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0685483870967742) internal successors, (265), 248 states have internal predecessors, (265), 0 states have call successors, (0), 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 13:13:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 265 transitions. [2024-11-12 13:13:39,797 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 265 transitions. Word has length 125 [2024-11-12 13:13:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:39,797 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 265 transitions. [2024-11-12 13:13:39,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.707692307692308) internal successors, (241), 65 states have internal predecessors, (241), 0 states have call successors, (0), 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 13:13:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 265 transitions. [2024-11-12 13:13:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-12 13:13:39,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:39,799 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:39,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-12 13:13:39,999 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:40,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1075055006, now seen corresponding path program 22 times [2024-11-12 13:13:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377065] [2024-11-12 13:13:40,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 200 proven. 373 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:40,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:40,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377065] [2024-11-12 13:13:40,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:40,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763791846] [2024-11-12 13:13:40,781 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:40,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:40,783 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:40,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-12 13:13:40,983 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:40,983 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:40,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-12 13:13:40,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:41,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:42,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:42,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763791846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:42,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:42,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2024-11-12 13:13:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025790294] [2024-11-12 13:13:42,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:42,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-12 13:13:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-12 13:13:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2024-11-12 13:13:42,379 INFO L87 Difference]: Start difference. First operand 249 states and 265 transitions. Second operand has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 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 13:13:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:43,718 INFO L93 Difference]: Finished difference Result 305 states and 322 transitions. [2024-11-12 13:13:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-12 13:13:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 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 129 [2024-11-12 13:13:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:43,719 INFO L225 Difference]: With dead ends: 305 [2024-11-12 13:13:43,719 INFO L226 Difference]: Without dead ends: 305 [2024-11-12 13:13:43,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 213 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2869 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=786, Invalid=6870, Unknown=0, NotChecked=0, Total=7656 [2024-11-12 13:13:43,720 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 285 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:43,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2264 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-12 13:13:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-12 13:13:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 259. [2024-11-12 13:13:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.069767441860465) internal successors, (276), 258 states have internal predecessors, (276), 0 states have call successors, (0), 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 13:13:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 276 transitions. [2024-11-12 13:13:43,725 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 276 transitions. Word has length 129 [2024-11-12 13:13:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:43,725 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 276 transitions. [2024-11-12 13:13:43,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.193548387096774) internal successors, (260), 63 states have internal predecessors, (260), 0 states have call successors, (0), 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 13:13:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 276 transitions. [2024-11-12 13:13:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-12 13:13:43,726 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:43,727 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:43,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:43,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-12 13:13:43,928 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-12 13:13:43,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -344040232, now seen corresponding path program 23 times [2024-11-12 13:13:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:43,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888519689] [2024-11-12 13:13:43,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat