/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:55:31,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:55:31,614 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 17:55:31,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:55:31,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:55:31,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:55:31,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:55:31,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:55:31,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:55:31,642 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:55:31,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:55:31,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:55:31,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:55:31,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:55:31,645 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:55:31,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:55:31,645 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:55:31,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:55:31,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:55:31,646 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:55:31,647 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:55:31,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:55:31,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:55:31,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:55:31,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:55:31,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:55:31,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:55:31,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:55:31,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:55:31,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:55:31,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:55:31,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:55:31,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:55:31,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:55:31,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:55:31,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:55:31,847 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:55:31,847 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:55:31,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2023-12-19 17:55:32,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:55:33,066 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:55:33,067 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2023-12-19 17:55:33,072 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eb3d4958/6084db476dc144fbb84cdc947d506266/FLAGfc604eeed [2023-12-19 17:55:33,085 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eb3d4958/6084db476dc144fbb84cdc947d506266 [2023-12-19 17:55:33,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:55:33,088 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:55:33,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:55:33,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:55:33,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:55:33,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513263bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33, skipping insertion in model container [2023-12-19 17:55:33,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,110 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:55:33,224 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i[893,906] [2023-12-19 17:55:33,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:55:33,242 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:55:33,250 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i[893,906] [2023-12-19 17:55:33,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:55:33,264 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:55:33,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33 WrapperNode [2023-12-19 17:55:33,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:55:33,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:55:33,266 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:55:33,266 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:55:33,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,288 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-12-19 17:55:33,288 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:55:33,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:55:33,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:55:33,289 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:55:33,295 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,296 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,305 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 17:55:33,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:55:33,311 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:55:33,311 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:55:33,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:55:33,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (1/1) ... [2023-12-19 17:55:33,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:55:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:55:33,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 17:55:33,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 17:55:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:55:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:55:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:55:33,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:55:33,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 17:55:33,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 17:55:33,399 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:55:33,401 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:55:33,470 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:55:33,483 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:55:33,483 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 17:55:33,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:55:33 BoogieIcfgContainer [2023-12-19 17:55:33,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:55:33,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:55:33,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:55:33,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:55:33,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:55:33" (1/3) ... [2023-12-19 17:55:33,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22092d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:55:33, skipping insertion in model container [2023-12-19 17:55:33,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:55:33" (2/3) ... [2023-12-19 17:55:33,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22092d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:55:33, skipping insertion in model container [2023-12-19 17:55:33,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:55:33" (3/3) ... [2023-12-19 17:55:33,499 INFO L112 eAbstractionObserver]: Analyzing ICFG id_build.i [2023-12-19 17:55:33,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:55:33,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:55:33,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:55:33,540 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@207d28a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:55:33,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:55:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 17:55:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 17:55:33,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:33,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:33,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:33,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -822356528, now seen corresponding path program 1 times [2023-12-19 17:55:33,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927622616] [2023-12-19 17:55:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927622616] [2023-12-19 17:55:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927622616] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:55:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:55:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 17:55:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804153701] [2023-12-19 17:55:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:55:33,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:55:33,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:33,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:55:33,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:55:33,780 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:33,820 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2023-12-19 17:55:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:55:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-19 17:55:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:33,826 INFO L225 Difference]: With dead ends: 33 [2023-12-19 17:55:33,826 INFO L226 Difference]: Without dead ends: 17 [2023-12-19 17:55:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:55:33,829 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:33,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:55:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-19 17:55:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-19 17:55:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 17:55:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-19 17:55:33,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2023-12-19 17:55:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:33,859 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-19 17:55:33,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:55:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-19 17:55:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 17:55:33,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:55:33,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:55:33,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:55:33,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:55:33,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:55:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1152830067, now seen corresponding path program 1 times [2023-12-19 17:55:33,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:55:33,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223298283] [2023-12-19 17:55:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:55:33,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:55:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:33,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-19 17:55:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:55:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:55:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:55:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223298283] [2023-12-19 17:55:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223298283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:55:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:55:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 17:55:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007086520] [2023-12-19 17:55:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:55:33,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 17:55:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:55:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 17:55:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:55:33,986 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 17:55:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:55:34,009 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-12-19 17:55:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:55:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-12-19 17:55:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:55:34,010 INFO L225 Difference]: With dead ends: 17 [2023-12-19 17:55:34,010 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 17:55:34,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 17:55:34,011 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:55:34,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:55:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 17:55:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 17:55:34,013 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) [2023-12-19 17:55:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 17:55:34,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2023-12-19 17:55:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:55:34,013 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 17:55:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 17:55:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 17:55:34,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 17:55:34,015 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 17:55:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 17:55:34,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 17:55:34,035 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 17:55:34,035 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~nlen~0#1|)) [2023-12-19 17:55:34,035 INFO L895 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~nlen~0#1|)) [2023-12-19 17:55:34,035 INFO L899 garLoopResultBuilder]: For program point L27-2(lines 27 32) no Hoare annotation was computed. [2023-12-19 17:55:34,035 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 32) the Hoare annotation is: (< 0 (+ |ULTIMATE.start_main_~i~0#1| 1)) [2023-12-19 17:55:34,035 INFO L899 garLoopResultBuilder]: For program point L27-4(lines 27 32) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point L30(lines 28 31) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 31) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~nlen~0#1|)) [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 22) the Hoare annotation is: true [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-12-19 17:55:34,036 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-12-19 17:55:34,037 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-12-19 17:55:34,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-19 17:55:34,040 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 17:55:34,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 05:55:34 BoogieIcfgContainer [2023-12-19 17:55:34,047 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 17:55:34,048 INFO L158 Benchmark]: Toolchain (without parser) took 959.41ms. Allocated memory is still 235.9MB. Free memory was 191.9MB in the beginning and 127.5MB in the end (delta: 64.5MB). Peak memory consumption was 64.0MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,048 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 17:55:34,048 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.41ms. Allocated memory is still 235.9MB. Free memory was 191.4MB in the beginning and 180.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,048 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.06ms. Allocated memory is still 235.9MB. Free memory was 180.9MB in the beginning and 179.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,049 INFO L158 Benchmark]: Boogie Preprocessor took 21.79ms. Allocated memory is still 235.9MB. Free memory was 179.4MB in the beginning and 177.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,049 INFO L158 Benchmark]: RCFGBuilder took 172.68ms. Allocated memory is still 235.9MB. Free memory was 177.8MB in the beginning and 166.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,049 INFO L158 Benchmark]: TraceAbstraction took 552.02ms. Allocated memory is still 235.9MB. Free memory was 166.3MB in the beginning and 127.5MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. [2023-12-19 17:55:34,051 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 140.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.41ms. Allocated memory is still 235.9MB. Free memory was 191.4MB in the beginning and 180.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.06ms. Allocated memory is still 235.9MB. Free memory was 180.9MB in the beginning and 179.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.79ms. Allocated memory is still 235.9MB. Free memory was 179.4MB in the beginning and 177.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.68ms. Allocated memory is still 235.9MB. Free memory was 177.8MB in the beginning and 166.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 552.02ms. Allocated memory is still 235.9MB. Free memory was 166.3MB in the beginning and 127.5MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. * 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: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 63 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43 IncrementalHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 21 mSDtfsCounter, 43 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=1, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 8 PreInvPairs, 12 NumberOfFragments, 33 HoareAnnotationTreeSize, 8 FormulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FormulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (0 < (i + 1)) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((0 <= i) && ((i + 1) <= nlen)) RESULT: Ultimate proved your program to be correct! [2023-12-19 17:55:34,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...