./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c4f91361 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:31:56,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:31:56,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 15:31:56,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:31:56,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:31:56,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:31:56,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:31:56,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:31:56,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:31:56,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:31:56,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:31:56,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:31:56,463 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:31:56,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:31:56,464 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:31:56,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:31:56,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:31:56,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:31:56,465 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 15:31:56,466 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 15:31:56,466 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 15:31:56,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:31:56,467 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 15:31:56,467 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 15:31:56,468 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:31:56,468 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:31:56,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:31:56,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:31:56,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:31:56,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:31:56,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:31:56,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:31:56,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:31:56,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:31:56,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:31:56,472 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:31:56,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:31:56,473 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:31:56,473 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:31:56,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2023-11-23 15:31:56,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:31:56,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:31:56,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:31:56,752 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:31:56,752 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:31:56,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6.c [2023-11-23 15:31:58,000 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:31:58,186 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:31:58,186 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6.c [2023-11-23 15:31:58,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa7c30e5/42f21a0b93774cc5a39a13888fc5c5d7/FLAG84370fc71 [2023-11-23 15:31:58,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffa7c30e5/42f21a0b93774cc5a39a13888fc5c5d7 [2023-11-23 15:31:58,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:31:58,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:31:58,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:31:58,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:31:58,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:31:58,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd5dc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58, skipping insertion in model container [2023-11-23 15:31:58,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,318 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:31:58,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:31:58,475 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:31:58,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:31:58,509 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:31:58,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58 WrapperNode [2023-11-23 15:31:58,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:31:58,511 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:31:58,511 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:31:58,511 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:31:58,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,546 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-23 15:31:58,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:31:58,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:31:58,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:31:58,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:31:58,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:31:58,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:31:58,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:31:58,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:31:58,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (1/1) ... [2023-11-23 15:31:58,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:31:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:31:58,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 15:31:58,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 15:31:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 15:31:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:31:58,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:31:58,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 15:31:58,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 15:31:58,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:31:58,765 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:31:58,767 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:31:58,999 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:31:59,029 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:31:59,030 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 15:31:59,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:59 BoogieIcfgContainer [2023-11-23 15:31:59,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:31:59,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:31:59,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:31:59,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:31:59,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:58" (1/3) ... [2023-11-23 15:31:59,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7e93e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:59, skipping insertion in model container [2023-11-23 15:31:59,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:58" (2/3) ... [2023-11-23 15:31:59,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7e93e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:59, skipping insertion in model container [2023-11-23 15:31:59,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:59" (3/3) ... [2023-11-23 15:31:59,040 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2023-11-23 15:31:59,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:31:59,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 15:31:59,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:31:59,110 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5257bd8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:31:59,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-23 15:31:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 15:31:59,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:31:59,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 15:31:59,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:31:59,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:31:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash 3138242, now seen corresponding path program 1 times [2023-11-23 15:31:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:31:59,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582283458] [2023-11-23 15:31:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:31:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:31:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:31:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:31:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:31:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582283458] [2023-11-23 15:31:59,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582283458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:31:59,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:31:59,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:31:59,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828047049] [2023-11-23 15:31:59,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:31:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:31:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:31:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:31:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:31:59,439 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:31:59,477 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-23 15:31:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:31:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 15:31:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:31:59,485 INFO L225 Difference]: With dead ends: 28 [2023-11-23 15:31:59,485 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 15:31:59,486 INFO L412 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 [2023-11-23 15:31:59,489 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:31:59,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:31:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 15:31:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-23 15:31:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 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) [2023-11-23 15:31:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 15:31:59,516 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2023-11-23 15:31:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:31:59,517 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 15:31:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 15:31:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:31:59,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:31:59,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:31:59,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 15:31:59,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:31:59,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:31:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash 97249997, now seen corresponding path program 1 times [2023-11-23 15:31:59,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:31:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128830602] [2023-11-23 15:31:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:31:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:31:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:31:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:31:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:31:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128830602] [2023-11-23 15:31:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128830602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:31:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:31:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:31:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739487897] [2023-11-23 15:31:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:31:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:31:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:31:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:31:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:31:59,616 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:31:59,658 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-23 15:31:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:31:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:31:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:31:59,660 INFO L225 Difference]: With dead ends: 43 [2023-11-23 15:31:59,660 INFO L226 Difference]: Without dead ends: 43 [2023-11-23 15:31:59,660 INFO L412 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 [2023-11-23 15:31:59,662 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:31:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:31:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-23 15:31:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2023-11-23 15:31:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 15:31:59,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2023-11-23 15:31:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:31:59,667 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 15:31:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 15:31:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:31:59,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:31:59,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:31:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 15:31:59,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:31:59,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:31:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 97285474, now seen corresponding path program 1 times [2023-11-23 15:31:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:31:59,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281697939] [2023-11-23 15:31:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:31:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:31:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:31:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:31:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:31:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281697939] [2023-11-23 15:31:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281697939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:31:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:31:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:31:59,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530983857] [2023-11-23 15:31:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:31:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:31:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:31:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:31:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:31:59,782 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:31:59,815 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-23 15:31:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:31:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:31:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:31:59,816 INFO L225 Difference]: With dead ends: 28 [2023-11-23 15:31:59,817 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 15:31:59,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:31:59,818 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 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 [2023-11-23 15:31:59,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:31:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 15:31:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-11-23 15:31:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-23 15:31:59,822 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2023-11-23 15:31:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:31:59,822 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-23 15:31:59,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-23 15:31:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:31:59,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:31:59,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:31:59,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 15:31:59,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:31:59,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:31:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash 97285555, now seen corresponding path program 1 times [2023-11-23 15:31:59,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:31:59,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102391262] [2023-11-23 15:31:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:31:59,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:31:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:31:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:31:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:31:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102391262] [2023-11-23 15:31:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102391262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:31:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:31:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:31:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899314862] [2023-11-23 15:31:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:31:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:31:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:31:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:31:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:31:59,929 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:31:59,959 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-23 15:31:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:31:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:31:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:31:59,961 INFO L225 Difference]: With dead ends: 24 [2023-11-23 15:31:59,961 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 15:31:59,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:31:59,962 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:31:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:31:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 15:31:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 15:31:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-23 15:31:59,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2023-11-23 15:31:59,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:31:59,966 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-23 15:31:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:31:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-23 15:31:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 15:31:59,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:31:59,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 15:31:59,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 15:31:59,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:31:59,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:31:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 97285556, now seen corresponding path program 1 times [2023-11-23 15:31:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:31:59,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220006182] [2023-11-23 15:31:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:31:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:31:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:00,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220006182] [2023-11-23 15:32:00,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220006182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:32:00,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:32:00,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:32:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5759137] [2023-11-23 15:32:00,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:32:00,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:32:00,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:32:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:32:00,068 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:00,111 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-23 15:32:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:32:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 15:32:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:00,112 INFO L225 Difference]: With dead ends: 25 [2023-11-23 15:32:00,112 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 15:32:00,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:32:00,114 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:00,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:32:00,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 15:32:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 15:32:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-23 15:32:00,118 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2023-11-23 15:32:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:00,118 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-23 15:32:00,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-23 15:32:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 15:32:00,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:00,119 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 15:32:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 15:32:00,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -997809686, now seen corresponding path program 1 times [2023-11-23 15:32:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331118673] [2023-11-23 15:32:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:00,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331118673] [2023-11-23 15:32:00,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331118673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:00,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420037734] [2023-11-23 15:32:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:00,212 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) [2023-11-23 15:32:00,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 15:32:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:00,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 15:32:00,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420037734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 15:32:00,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056823007] [2023-11-23 15:32:00,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 15:32:00,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 15:32:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-23 15:32:00,357 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:00,445 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-23 15:32:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:32:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 15:32:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:00,449 INFO L225 Difference]: With dead ends: 38 [2023-11-23 15:32:00,449 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 15:32:00,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:32:00,450 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:00,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 15:32:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-11-23 15:32:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-23 15:32:00,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 7 [2023-11-23 15:32:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:00,456 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-23 15:32:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-23 15:32:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 15:32:00,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:00,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:00,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 15:32:00,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 15:32:00,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:00,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash -867329222, now seen corresponding path program 1 times [2023-11-23 15:32:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249024866] [2023-11-23 15:32:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:00,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249024866] [2023-11-23 15:32:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249024866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818257585] [2023-11-23 15:32:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:00,756 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) [2023-11-23 15:32:00,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 15:32:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:00,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 15:32:00,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818257585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:00,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-23 15:32:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515451418] [2023-11-23 15:32:00,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 15:32:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 15:32:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:32:00,915 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-11-23 15:32:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:00,987 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-11-23 15:32:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:32:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 15:32:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:00,989 INFO L225 Difference]: With dead ends: 35 [2023-11-23 15:32:00,989 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 15:32:00,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:32:00,990 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:00,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 15:32:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-23 15:32:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-23 15:32:00,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2023-11-23 15:32:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:00,996 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-23 15:32:00,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-11-23 15:32:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-23 15:32:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 15:32:00,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:00,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-23 15:32:01,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:01,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 15:32:01,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:01,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -867329140, now seen corresponding path program 1 times [2023-11-23 15:32:01,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:01,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064981593] [2023-11-23 15:32:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:01,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064981593] [2023-11-23 15:32:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064981593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825409464] [2023-11-23 15:32:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:01,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:01,392 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) [2023-11-23 15:32:01,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 15:32:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:01,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 15:32:01,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:01,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 15:32:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:01,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:01,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825409464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:01,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:01,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-23 15:32:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543406186] [2023-11-23 15:32:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:01,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 15:32:01,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 15:32:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:32:01,614 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:01,715 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-11-23 15:32:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 15:32:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 15:32:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:01,717 INFO L225 Difference]: With dead ends: 34 [2023-11-23 15:32:01,717 INFO L226 Difference]: Without dead ends: 34 [2023-11-23 15:32:01,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-11-23 15:32:01,718 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:01,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-23 15:32:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-23 15:32:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-23 15:32:01,721 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 8 [2023-11-23 15:32:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:01,722 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-23 15:32:01,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-23 15:32:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 15:32:01,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:01,723 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2023-11-23 15:32:01,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:01,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:01,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:01,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1487159490, now seen corresponding path program 2 times [2023-11-23 15:32:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:01,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741683629] [2023-11-23 15:32:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:01,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741683629] [2023-11-23 15:32:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741683629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659787258] [2023-11-23 15:32:02,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:02,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:02,090 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) [2023-11-23 15:32:02,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 15:32:02,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:32:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:02,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 15:32:02,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:02,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659787258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:02,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:02,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 15:32:02,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119878681] [2023-11-23 15:32:02,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 15:32:02,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 15:32:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:32:02,285 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:02,515 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-11-23 15:32:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 15:32:02,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 15:32:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:02,517 INFO L225 Difference]: With dead ends: 62 [2023-11-23 15:32:02,517 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 15:32:02,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-11-23 15:32:02,518 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:02,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 68 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 15:32:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2023-11-23 15:32:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-11-23 15:32:02,523 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 16 [2023-11-23 15:32:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:02,523 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-11-23 15:32:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-11-23 15:32:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 15:32:02,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:02,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 15:32:02,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:02,725 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:02,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1142696094, now seen corresponding path program 2 times [2023-11-23 15:32:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:02,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149401642] [2023-11-23 15:32:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:02,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149401642] [2023-11-23 15:32:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149401642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289862245] [2023-11-23 15:32:02,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:02,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:02,836 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) [2023-11-23 15:32:02,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 15:32:02,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:32:02,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:02,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:32:02,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:02,902 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-23 15:32:02,902 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 [2023-11-23 15:32:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 15:32:02,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:32:02,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289862245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:32:02,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:32:02,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-11-23 15:32:02,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325822196] [2023-11-23 15:32:02,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:32:02,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:32:02,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:02,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:32:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:32:02,998 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:03,016 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-11-23 15:32:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:32:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 15:32:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:03,017 INFO L225 Difference]: With dead ends: 49 [2023-11-23 15:32:03,018 INFO L226 Difference]: Without dead ends: 49 [2023-11-23 15:32:03,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-23 15:32:03,018 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:03,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:32:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-23 15:32:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-23 15:32:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2023-11-23 15:32:03,023 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 17 [2023-11-23 15:32:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:03,023 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2023-11-23 15:32:03,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2023-11-23 15:32:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 15:32:03,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:03,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2023-11-23 15:32:03,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:03,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 15:32:03,248 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:03,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1142696093, now seen corresponding path program 1 times [2023-11-23 15:32:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12499334] [2023-11-23 15:32:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:03,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:03,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12499334] [2023-11-23 15:32:03,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12499334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:03,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084341547] [2023-11-23 15:32:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:03,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:03,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:03,384 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) [2023-11-23 15:32:03,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 15:32:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:03,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 15:32:03,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:03,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084341547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:03,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 15:32:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348019521] [2023-11-23 15:32:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:03,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 15:32:03,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 15:32:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2023-11-23 15:32:03,650 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:03,723 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-11-23 15:32:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 15:32:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 15:32:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:03,724 INFO L225 Difference]: With dead ends: 54 [2023-11-23 15:32:03,725 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 15:32:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2023-11-23 15:32:03,726 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 15:32:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2023-11-23 15:32:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 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) [2023-11-23 15:32:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-11-23 15:32:03,729 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2023-11-23 15:32:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:03,729 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-11-23 15:32:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-11-23 15:32:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 15:32:03,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:03,730 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2023-11-23 15:32:03,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:03,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:03,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:03,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1142696012, now seen corresponding path program 2 times [2023-11-23 15:32:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:03,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701794174] [2023-11-23 15:32:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:03,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701794174] [2023-11-23 15:32:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701794174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241116726] [2023-11-23 15:32:04,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:04,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:04,112 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) [2023-11-23 15:32:04,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 15:32:04,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:32:04,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:04,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 15:32:04,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:04,193 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 [2023-11-23 15:32:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:04,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241116726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:04,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:04,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-23 15:32:04,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831195011] [2023-11-23 15:32:04,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:04,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 15:32:04,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 15:32:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-23 15:32:04,538 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:04,872 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-23 15:32:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 15:32:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2023-11-23 15:32:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:04,873 INFO L225 Difference]: With dead ends: 50 [2023-11-23 15:32:04,873 INFO L226 Difference]: Without dead ends: 50 [2023-11-23 15:32:04,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2023-11-23 15:32:04,874 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:04,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-23 15:32:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-23 15:32:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 49 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) [2023-11-23 15:32:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-11-23 15:32:04,878 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 17 [2023-11-23 15:32:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:04,878 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-11-23 15:32:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-11-23 15:32:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 15:32:04,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:04,879 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1] [2023-11-23 15:32:04,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:05,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:05,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash -572232254, now seen corresponding path program 3 times [2023-11-23 15:32:05,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:05,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409241482] [2023-11-23 15:32:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409241482] [2023-11-23 15:32:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409241482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402936803] [2023-11-23 15:32:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:32:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:05,357 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) [2023-11-23 15:32:05,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 15:32:05,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 15:32:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:05,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:32:05,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-23 15:32:05,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-23 15:32:05,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402936803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:05,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:05,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 20 [2023-11-23 15:32:05,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962328342] [2023-11-23 15:32:05,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:05,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 15:32:05,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 15:32:05,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-23 15:32:05,922 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:06,211 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-23 15:32:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 15:32:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-23 15:32:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:06,213 INFO L225 Difference]: With dead ends: 56 [2023-11-23 15:32:06,213 INFO L226 Difference]: Without dead ends: 56 [2023-11-23 15:32:06,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 15:32:06,214 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:06,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 47 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-23 15:32:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2023-11-23 15:32:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-11-23 15:32:06,222 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 34 [2023-11-23 15:32:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:06,224 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-11-23 15:32:06,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-11-23 15:32:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 15:32:06,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:06,227 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2023-11-23 15:32:06,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 15:32:06,442 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:06,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -559330717, now seen corresponding path program 2 times [2023-11-23 15:32:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:06,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127176583] [2023-11-23 15:32:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:06,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127176583] [2023-11-23 15:32:06,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127176583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081294539] [2023-11-23 15:32:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:06,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:06,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:06,704 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) [2023-11-23 15:32:06,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 15:32:06,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:32:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:06,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 15:32:06,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:06,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 15:32:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 15:32:06,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 15:32:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-23 15:32:06,924 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:32:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081294539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:32:06,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:32:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [13] total 14 [2023-11-23 15:32:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414887969] [2023-11-23 15:32:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:32:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:32:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:06,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:32:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:32:06,926 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:06,946 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2023-11-23 15:32:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:32:06,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-23 15:32:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:06,947 INFO L225 Difference]: With dead ends: 85 [2023-11-23 15:32:06,947 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 15:32:06,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:32:06,948 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:06,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:32:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 15:32:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-23 15:32:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.1125) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-11-23 15:32:06,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 35 [2023-11-23 15:32:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:06,952 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-11-23 15:32:06,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-11-23 15:32:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 15:32:06,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:06,953 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2023-11-23 15:32:06,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:07,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 15:32:07,169 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:07,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash -559330636, now seen corresponding path program 3 times [2023-11-23 15:32:07,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:07,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588509206] [2023-11-23 15:32:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:07,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588509206] [2023-11-23 15:32:07,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588509206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543643248] [2023-11-23 15:32:07,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:32:07,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:07,516 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) [2023-11-23 15:32:07,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 15:32:07,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 15:32:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:07,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 15:32:07,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:07,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 15:32:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-23 15:32:07,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-23 15:32:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543643248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:08,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:08,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 20 [2023-11-23 15:32:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503426013] [2023-11-23 15:32:08,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 15:32:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 15:32:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-23 15:32:08,038 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2023-11-23 15:32:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:08,894 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-11-23 15:32:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 15:32:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 [2023-11-23 15:32:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:08,895 INFO L225 Difference]: With dead ends: 95 [2023-11-23 15:32:08,895 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 15:32:08,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 15:32:08,898 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 187 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:08,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 81 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 15:32:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 15:32:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2023-11-23 15:32:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-11-23 15:32:08,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 35 [2023-11-23 15:32:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-11-23 15:32:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2023-11-23 15:32:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-11-23 15:32:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 15:32:08,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:08,904 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:08,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 15:32:09,116 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:09,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2093587059, now seen corresponding path program 1 times [2023-11-23 15:32:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806111857] [2023-11-23 15:32:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-23 15:32:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806111857] [2023-11-23 15:32:09,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806111857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865398568] [2023-11-23 15:32:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:09,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:09,253 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) [2023-11-23 15:32:09,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 15:32:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:09,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 15:32:09,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:09,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865398568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:09,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 13, 13] total 27 [2023-11-23 15:32:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412007404] [2023-11-23 15:32:09,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:09,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 15:32:09,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 15:32:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-11-23 15:32:09,784 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:10,862 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2023-11-23 15:32:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-23 15:32:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2023-11-23 15:32:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:10,863 INFO L225 Difference]: With dead ends: 153 [2023-11-23 15:32:10,864 INFO L226 Difference]: Without dead ends: 153 [2023-11-23 15:32:10,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1752, Invalid=3360, Unknown=0, NotChecked=0, Total=5112 [2023-11-23 15:32:10,866 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:10,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 17 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-23 15:32:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-11-23 15:32:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2023-11-23 15:32:10,876 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 39 [2023-11-23 15:32:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:10,876 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2023-11-23 15:32:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2023-11-23 15:32:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 15:32:10,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:10,881 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:10,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 15:32:11,092 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:11,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -932253426, now seen corresponding path program 1 times [2023-11-23 15:32:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:11,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282405240] [2023-11-23 15:32:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282405240] [2023-11-23 15:32:11,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282405240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939146126] [2023-11-23 15:32:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:11,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:11,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:11,744 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) [2023-11-23 15:32:11,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 15:32:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:11,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 15:32:11,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:12,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:32:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939146126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:13,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2023-11-23 15:32:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489711264] [2023-11-23 15:32:13,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:13,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-23 15:32:13,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-23 15:32:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2023-11-23 15:32:13,599 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 71 states, 71 states have (on average 3.0) internal successors, (213), 71 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:13,765 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2023-11-23 15:32:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 15:32:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0) internal successors, (213), 71 states have internal predecessors, (213), 0 states have call successors, (0), 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 77 [2023-11-23 15:32:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:13,766 INFO L225 Difference]: With dead ends: 212 [2023-11-23 15:32:13,767 INFO L226 Difference]: Without dead ends: 212 [2023-11-23 15:32:13,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2050, Invalid=2920, Unknown=0, NotChecked=0, Total=4970 [2023-11-23 15:32:13,768 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:13,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-23 15:32:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-11-23 15:32:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.0334928229665072) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2023-11-23 15:32:13,773 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 77 [2023-11-23 15:32:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:13,773 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2023-11-23 15:32:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0) internal successors, (213), 71 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2023-11-23 15:32:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-23 15:32:13,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:13,778 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:13,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 15:32:13,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:13,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash 209634830, now seen corresponding path program 2 times [2023-11-23 15:32:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754176315] [2023-11-23 15:32:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2023-11-23 15:32:14,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754176315] [2023-11-23 15:32:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754176315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:14,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105396213] [2023-11-23 15:32:14,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:14,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:14,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:14,182 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) [2023-11-23 15:32:14,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 15:32:14,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 15:32:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:14,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 15:32:14,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2023-11-23 15:32:15,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:32:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105396213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:32:15,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:32:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-23 15:32:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480132479] [2023-11-23 15:32:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:32:15,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:32:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:32:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2023-11-23 15:32:15,747 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:15,826 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2023-11-23 15:32:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:32:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-23 15:32:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:15,827 INFO L225 Difference]: With dead ends: 211 [2023-11-23 15:32:15,827 INFO L226 Difference]: Without dead ends: 209 [2023-11-23 15:32:15,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2023-11-23 15:32:15,828 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:15,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-23 15:32:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-23 15:32:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0241545893719808) internal successors, (212), 208 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2023-11-23 15:32:15,832 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 107 [2023-11-23 15:32:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:15,832 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2023-11-23 15:32:15,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2023-11-23 15:32:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 15:32:15,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:15,833 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:15,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:16,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 15:32:16,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2091249601, now seen corresponding path program 1 times [2023-11-23 15:32:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:16,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146312785] [2023-11-23 15:32:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:16,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2023-11-23 15:32:16,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:16,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146312785] [2023-11-23 15:32:16,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146312785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:16,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635298499] [2023-11-23 15:32:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:16,196 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) [2023-11-23 15:32:16,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 15:32:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:16,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:32:16,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-11-23 15:32:16,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 153 proven. 3 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2023-11-23 15:32:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635298499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:16,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:16,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2023-11-23 15:32:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477765259] [2023-11-23 15:32:16,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 15:32:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 15:32:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:32:16,657 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:16,751 INFO L93 Difference]: Finished difference Result 422 states and 427 transitions. [2023-11-23 15:32:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:32:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-11-23 15:32:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:16,753 INFO L225 Difference]: With dead ends: 422 [2023-11-23 15:32:16,753 INFO L226 Difference]: Without dead ends: 422 [2023-11-23 15:32:16,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:32:16,754 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:16,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 16 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-23 15:32:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 410. [2023-11-23 15:32:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 408 states have (on average 1.0220588235294117) internal successors, (417), 409 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 417 transitions. [2023-11-23 15:32:16,760 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 417 transitions. Word has length 108 [2023-11-23 15:32:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:16,761 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 417 transitions. [2023-11-23 15:32:16,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 417 transitions. [2023-11-23 15:32:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-23 15:32:16,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:16,763 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 2, 2, 2, 1, 1, 1] [2023-11-23 15:32:16,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:16,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:16,976 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:16,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1002599432, now seen corresponding path program 1 times [2023-11-23 15:32:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:16,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19659541] [2023-11-23 15:32:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 3140 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-11-23 15:32:17,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:17,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19659541] [2023-11-23 15:32:17,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19659541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:17,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475893471] [2023-11-23 15:32:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:17,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:17,572 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) [2023-11-23 15:32:17,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 15:32:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:17,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 15:32:17,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:17,772 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 [2023-11-23 15:32:17,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 15:32:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 3140 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-11-23 15:32:18,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 3140 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-11-23 15:32:19,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475893471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:19,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:19,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 7 [2023-11-23 15:32:19,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078609631] [2023-11-23 15:32:19,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:19,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 15:32:19,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 15:32:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 15:32:19,334 INFO L87 Difference]: Start difference. First operand 410 states and 417 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:19,400 INFO L93 Difference]: Finished difference Result 711 states and 721 transitions. [2023-11-23 15:32:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 15:32:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2023-11-23 15:32:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:19,403 INFO L225 Difference]: With dead ends: 711 [2023-11-23 15:32:19,404 INFO L226 Difference]: Without dead ends: 711 [2023-11-23 15:32:19,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:32:19,404 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:19,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:32:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-11-23 15:32:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 709. [2023-11-23 15:32:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 707 states have (on average 1.016973125884017) internal successors, (719), 708 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 719 transitions. [2023-11-23 15:32:19,414 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 719 transitions. Word has length 201 [2023-11-23 15:32:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:19,415 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 719 transitions. [2023-11-23 15:32:19,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 719 transitions. [2023-11-23 15:32:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-11-23 15:32:19,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:19,420 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:19,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:19,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:19,636 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:19,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash -179340048, now seen corresponding path program 2 times [2023-11-23 15:32:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:19,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72539487] [2023-11-23 15:32:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24926 backedges. 0 proven. 18844 refuted. 0 times theorem prover too weak. 6082 trivial. 0 not checked. [2023-11-23 15:32:20,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:20,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72539487] [2023-11-23 15:32:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72539487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:20,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043952110] [2023-11-23 15:32:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:32:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:20,413 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) [2023-11-23 15:32:20,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 15:32:20,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:32:20,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:20,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 15:32:20,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24926 backedges. 3140 proven. 12564 refuted. 0 times theorem prover too weak. 9222 trivial. 0 not checked. [2023-11-23 15:32:21,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:32:22,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 15:32:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24926 backedges. 3140 proven. 12564 refuted. 0 times theorem prover too weak. 9222 trivial. 0 not checked. [2023-11-23 15:32:23,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043952110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:32:23,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:32:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-23 15:32:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738112131] [2023-11-23 15:32:23,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:32:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 15:32:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 15:32:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-23 15:32:23,051 INFO L87 Difference]: Start difference. First operand 709 states and 719 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 16 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) [2023-11-23 15:32:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:23,270 INFO L93 Difference]: Finished difference Result 725 states and 734 transitions. [2023-11-23 15:32:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 15:32:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 16 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) Word has length 408 [2023-11-23 15:32:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:23,273 INFO L225 Difference]: With dead ends: 725 [2023-11-23 15:32:23,273 INFO L226 Difference]: Without dead ends: 725 [2023-11-23 15:32:23,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-11-23 15:32:23,274 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:23,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 82 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 15:32:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2023-11-23 15:32:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2023-11-23 15:32:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 710 states have (on average 1.0154929577464789) internal successors, (721), 711 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 721 transitions. [2023-11-23 15:32:23,284 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 721 transitions. Word has length 408 [2023-11-23 15:32:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:23,285 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 721 transitions. [2023-11-23 15:32:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 16 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) [2023-11-23 15:32:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 721 transitions. [2023-11-23 15:32:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-11-23 15:32:23,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 15:32:23,292 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2023-11-23 15:32:23,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:23,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:23,508 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 15:32:23,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:32:23,509 INFO L85 PathProgramCache]: Analyzing trace with hash -278848377, now seen corresponding path program 3 times [2023-11-23 15:32:23,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:32:23,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887459395] [2023-11-23 15:32:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:32:23,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:32:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:32:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39012 backedges. 0 proven. 31405 refuted. 0 times theorem prover too weak. 7607 trivial. 0 not checked. [2023-11-23 15:32:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:32:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887459395] [2023-11-23 15:32:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887459395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:32:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172928881] [2023-11-23 15:32:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 15:32:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:32:24,604 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) [2023-11-23 15:32:24,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 15:32:24,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 15:32:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:32:24,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 15:32:24,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:32:24,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 15:32:24,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 15:32:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 39012 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 39007 trivial. 0 not checked. [2023-11-23 15:32:26,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:32:26,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172928881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:32:26,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:32:26,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-23 15:32:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149251116] [2023-11-23 15:32:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:32:26,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 15:32:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:32:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 15:32:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-23 15:32:26,297 INFO L87 Difference]: Start difference. First operand 712 states and 721 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 15:32:26,347 INFO L93 Difference]: Finished difference Result 710 states and 719 transitions. [2023-11-23 15:32:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:32:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2023-11-23 15:32:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 15:32:26,348 INFO L225 Difference]: With dead ends: 710 [2023-11-23 15:32:26,348 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 15:32:26,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 15:32:26,349 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 15:32:26,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 15:32:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 15:32:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 15:32:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 15:32:26,350 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 511 [2023-11-23 15:32:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 15:32:26,351 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 15:32:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:32:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 15:32:26,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 15:32:26,353 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2023-11-23 15:32:26,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-23 15:32:26,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-23 15:32:26,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-23 15:32:26,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-23 15:32:26,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2023-11-23 15:32:26,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-11-23 15:32:26,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-23 15:32:26,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 15:32:26,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:32:26,571 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:32:26,573 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 15:32:26,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:32:26 BoogieIcfgContainer [2023-11-23 15:32:26,575 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 15:32:26,576 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 15:32:26,576 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 15:32:26,576 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 15:32:26,576 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:59" (3/4) ... [2023-11-23 15:32:26,578 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 15:32:26,585 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-23 15:32:26,585 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-23 15:32:26,585 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 15:32:26,586 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 15:32:26,672 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-11-23 15:32:26,674 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2023-11-23 15:32:26,674 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 15:32:26,675 INFO L158 Benchmark]: Toolchain (without parser) took 28456.89ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 99.9MB in the beginning and 146.2MB in the end (delta: -46.3MB). Peak memory consumption was 143.2MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,678 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 172.0MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 15:32:26,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 288.86ms. Allocated memory is still 172.0MB. Free memory was 99.7MB in the beginning and 134.8MB in the end (delta: -35.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,679 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.44ms. Allocated memory is still 172.0MB. Free memory was 134.8MB in the beginning and 133.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,679 INFO L158 Benchmark]: Boogie Preprocessor took 49.69ms. Allocated memory is still 172.0MB. Free memory was 133.2MB in the beginning and 132.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 15:32:26,680 INFO L158 Benchmark]: RCFGBuilder took 432.41ms. Allocated memory is still 172.0MB. Free memory was 132.1MB in the beginning and 118.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,680 INFO L158 Benchmark]: TraceAbstraction took 27543.57ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 117.5MB in the beginning and 151.5MB in the end (delta: -34.0MB). Peak memory consumption was 156.9MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,680 INFO L158 Benchmark]: Witness Printer took 98.12ms. Allocated memory is still 360.7MB. Free memory was 151.5MB in the beginning and 146.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-23 15:32:26,685 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 172.0MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 288.86ms. Allocated memory is still 172.0MB. Free memory was 99.7MB in the beginning and 134.8MB in the end (delta: -35.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.44ms. Allocated memory is still 172.0MB. Free memory was 134.8MB in the beginning and 133.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.69ms. Allocated memory is still 172.0MB. Free memory was 133.2MB in the beginning and 132.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 432.41ms. Allocated memory is still 172.0MB. Free memory was 132.1MB in the beginning and 118.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 27543.57ms. Allocated memory was 172.0MB in the beginning and 360.7MB in the end (delta: 188.7MB). Free memory was 117.5MB in the beginning and 151.5MB in the end (delta: -34.0MB). Peak memory consumption was 156.9MB. Max. memory is 16.1GB. * Witness Printer took 98.12ms. Allocated memory is still 360.7MB. Free memory was 151.5MB in the beginning and 146.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 27.5s, OverallIterations: 22, TraceHistogramMax: 160, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 871 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 871 mSDsluCounter, 793 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 570 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2599 IncrementalHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 223 mSDtfsCounter, 2599 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2840 GetRequests, 2458 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=712occurred in iteration=21, InterpolantAutomatonStates: 241, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 100 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 16.6s InterpolantComputationTime, 3314 NumberOfCodeBlocks, 2619 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 4237 ConstructedInterpolants, 122 QuantifiedInterpolants, 39356 SizeOfPredicates, 53 NumberOfNonLiveVariables, 4192 ConjunctsInSsa, 225 ConjunctsInUnsatCore, 52 InterpolantComputations, 9 PerfectInterpolantSequences, 94862/183085 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 15:32:26,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE