/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/array-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 16:59:14,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 16:59:14,247 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 16:59:14,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 16:59:14,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 16:59:14,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 16:59:14,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 16:59:14,300 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 16:59:14,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 16:59:14,303 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 16:59:14,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 16:59:14,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 16:59:14,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 16:59:14,306 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 16:59:14,306 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 16:59:14,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 16:59:14,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 16:59:14,306 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 16:59:14,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 16:59:14,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 16:59:14,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 16:59:14,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 16:59:14,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 16:59:14,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 16:59:14,309 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 16:59:14,309 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 16:59:14,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 16:59:14,309 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 16:59:14,310 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 16:59:14,310 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 16:59:14,311 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 16:59:14,311 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 16:59:14,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:59:14,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 16:59:14,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 16:59:14,311 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 16:59:14,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 16:59:14,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 16:59:14,312 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 16:59:14,312 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 16:59:14,312 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 16:59:14,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 16:59:14,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 16:59:14,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 16:59:14,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 16:59:14,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 16:59:14,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 16:59:14,655 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 16:59:14,668 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 16:59:14,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2023-12-15 16:59:15,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 16:59:15,970 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 16:59:15,971 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2023-12-15 16:59:15,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e2cbc01/c3d59ea95a3a4bfbad6a3a191154402b/FLAG4ed7f5e1d [2023-12-15 16:59:15,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e2cbc01/c3d59ea95a3a4bfbad6a3a191154402b [2023-12-15 16:59:15,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 16:59:15,997 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 16:59:16,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 16:59:16,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 16:59:16,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 16:59:16,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:59:15" (1/1) ... [2023-12-15 16:59:16,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440063fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16, skipping insertion in model container [2023-12-15 16:59:16,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 04:59:15" (1/1) ... [2023-12-15 16:59:16,025 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 16:59:16,157 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i[816,829] [2023-12-15 16:59:16,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:59:16,187 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 16:59:16,198 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i[816,829] [2023-12-15 16:59:16,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 16:59:16,231 INFO L206 MainTranslator]: Completed translation [2023-12-15 16:59:16,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16 WrapperNode [2023-12-15 16:59:16,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 16:59:16,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 16:59:16,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 16:59:16,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 16:59:16,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,268 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2023-12-15 16:59:16,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 16:59:16,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 16:59:16,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 16:59:16,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 16:59:16,277 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,278 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,296 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 8 writes are split as follows [0, 8]. [2023-12-15 16:59:16,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,300 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 16:59:16,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 16:59:16,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 16:59:16,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 16:59:16,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (1/1) ... [2023-12-15 16:59:16,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 16:59:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:16,349 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) [2023-12-15 16:59:16,355 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 [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 16:59:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 16:59:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 16:59:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 16:59:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 16:59:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 16:59:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 16:59:16,470 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 16:59:16,477 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 16:59:16,576 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 16:59:16,592 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 16:59:16,592 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-15 16:59:16,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:59:16 BoogieIcfgContainer [2023-12-15 16:59:16,593 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 16:59:16,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 16:59:16,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 16:59:16,597 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 16:59:16,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 04:59:15" (1/3) ... [2023-12-15 16:59:16,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc2f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:59:16, skipping insertion in model container [2023-12-15 16:59:16,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 04:59:16" (2/3) ... [2023-12-15 16:59:16,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc2f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 04:59:16, skipping insertion in model container [2023-12-15 16:59:16,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 04:59:16" (3/3) ... [2023-12-15 16:59:16,598 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2023-12-15 16:59:16,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 16:59:16,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 16:59:16,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 16:59:16,683 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;@3652929f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 16:59:16,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 16:59:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 16:59:16,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:16,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:16,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:16,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -263400735, now seen corresponding path program 1 times [2023-12-15 16:59:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:16,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284425678] [2023-12-15 16:59:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 16:59:16,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284425678] [2023-12-15 16:59:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284425678] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 16:59:16,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 16:59:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 16:59:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901670180] [2023-12-15 16:59:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 16:59:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 16:59:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:59:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 16:59:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 16:59:16,925 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:59:17,018 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2023-12-15 16:59:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 16:59:17,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-15 16:59:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:59:17,025 INFO L225 Difference]: With dead ends: 54 [2023-12-15 16:59:17,025 INFO L226 Difference]: Without dead ends: 30 [2023-12-15 16:59:17,027 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 [2023-12-15 16:59:17,030 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:59:17,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:59:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-15 16:59:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-15 16:59:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2023-12-15 16:59:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-12-15 16:59:17,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 20 [2023-12-15 16:59:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:59:17,060 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-12-15 16:59:17,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-12-15 16:59:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-15 16:59:17,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:17,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:17,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 16:59:17,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:17,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1704968665, now seen corresponding path program 1 times [2023-12-15 16:59:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:17,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058621069] [2023-12-15 16:59:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 16:59:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058621069] [2023-12-15 16:59:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058621069] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:59:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911692539] [2023-12-15 16:59:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:17,227 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) [2023-12-15 16:59:17,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 16:59:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:17,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 16:59:17,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:59:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 16:59:17,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:59:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 16:59:17,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911692539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:59:17,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:59:17,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-15 16:59:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971852509] [2023-12-15 16:59:17,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:59:17,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 16:59:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:59:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 16:59:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 16:59:17,345 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:59:17,434 INFO L93 Difference]: Finished difference Result 81 states and 120 transitions. [2023-12-15 16:59:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 16:59:17,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-15 16:59:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:59:17,435 INFO L225 Difference]: With dead ends: 81 [2023-12-15 16:59:17,435 INFO L226 Difference]: Without dead ends: 54 [2023-12-15 16:59:17,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-15 16:59:17,436 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 16:59:17,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 16:59:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-15 16:59:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-15 16:59:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-12-15 16:59:17,443 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2023-12-15 16:59:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:59:17,443 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-12-15 16:59:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-12-15 16:59:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-15 16:59:17,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:17,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:17,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 16:59:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:17,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:17,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1887815389, now seen corresponding path program 2 times [2023-12-15 16:59:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208331747] [2023-12-15 16:59:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 16:59:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208331747] [2023-12-15 16:59:17,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208331747] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:59:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342816914] [2023-12-15 16:59:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 16:59:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:17,839 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) [2023-12-15 16:59:17,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 16:59:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 16:59:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:59:17,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 16:59:17,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:59:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 16:59:17,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:59:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 16:59:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342816914] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:59:17,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:59:17,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-15 16:59:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371581311] [2023-12-15 16:59:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:59:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 16:59:17,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:59:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 16:59:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 16:59:17,987 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:59:18,190 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2023-12-15 16:59:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 16:59:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-15 16:59:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:59:18,193 INFO L225 Difference]: With dead ends: 150 [2023-12-15 16:59:18,193 INFO L226 Difference]: Without dead ends: 102 [2023-12-15 16:59:18,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-15 16:59:18,196 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 16:59:18,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 16:59:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-15 16:59:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-12-15 16:59:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2023-12-15 16:59:18,212 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 52 [2023-12-15 16:59:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:59:18,212 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2023-12-15 16:59:18,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2023-12-15 16:59:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-15 16:59:18,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:18,214 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:18,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 16:59:18,419 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,SelfDestructingSolverStorable2 [2023-12-15 16:59:18,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1801964195, now seen corresponding path program 3 times [2023-12-15 16:59:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234368493] [2023-12-15 16:59:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-15 16:59:18,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234368493] [2023-12-15 16:59:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234368493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:59:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087795993] [2023-12-15 16:59:18,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 16:59:18,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:18,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:18,767 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) [2023-12-15 16:59:18,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 16:59:32,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-15 16:59:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:59:32,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 16:59:32,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:59:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-15 16:59:32,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:59:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-12-15 16:59:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087795993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:59:32,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:59:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 25 [2023-12-15 16:59:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894347684] [2023-12-15 16:59:32,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:59:32,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-15 16:59:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:59:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-15 16:59:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 16:59:32,573 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:59:32,902 INFO L93 Difference]: Finished difference Result 288 states and 399 transitions. [2023-12-15 16:59:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 16:59:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-12-15 16:59:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:59:32,905 INFO L225 Difference]: With dead ends: 288 [2023-12-15 16:59:32,905 INFO L226 Difference]: Without dead ends: 198 [2023-12-15 16:59:32,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-15 16:59:32,909 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 16:59:32,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 16:59:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-15 16:59:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-12-15 16:59:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 197 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 206 transitions. [2023-12-15 16:59:32,931 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 206 transitions. Word has length 100 [2023-12-15 16:59:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:59:32,931 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 206 transitions. [2023-12-15 16:59:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 206 transitions. [2023-12-15 16:59:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-12-15 16:59:32,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:32,944 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:32,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 16:59:33,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:33,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:33,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1370279331, now seen corresponding path program 4 times [2023-12-15 16:59:33,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:33,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333855355] [2023-12-15 16:59:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-12-15 16:59:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333855355] [2023-12-15 16:59:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333855355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:59:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009627770] [2023-12-15 16:59:34,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 16:59:34,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:34,308 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) [2023-12-15 16:59:34,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 16:59:34,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 16:59:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 16:59:34,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-15 16:59:34,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 16:59:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-12-15 16:59:34,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 16:59:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-12-15 16:59:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009627770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 16:59:35,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 16:59:35,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-15 16:59:35,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976142144] [2023-12-15 16:59:35,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 16:59:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-15 16:59:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 16:59:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-15 16:59:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 16:59:35,315 INFO L87 Difference]: Start difference. First operand 198 states and 206 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 16:59:36,080 INFO L93 Difference]: Finished difference Result 564 states and 771 transitions. [2023-12-15 16:59:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-15 16:59:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 0 states have call successors, (0), 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 196 [2023-12-15 16:59:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 16:59:36,082 INFO L225 Difference]: With dead ends: 564 [2023-12-15 16:59:36,082 INFO L226 Difference]: Without dead ends: 390 [2023-12-15 16:59:36,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 16:59:36,083 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 16:59:36,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1254 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 16:59:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-12-15 16:59:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2023-12-15 16:59:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0231362467866323) internal successors, (398), 389 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 398 transitions. [2023-12-15 16:59:36,095 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 398 transitions. Word has length 196 [2023-12-15 16:59:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 16:59:36,096 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 398 transitions. [2023-12-15 16:59:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 16:59:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 398 transitions. [2023-12-15 16:59:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-12-15 16:59:36,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 16:59:36,099 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 16:59:36,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 16:59:36,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:36,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 16:59:36,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 16:59:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1549685667, now seen corresponding path program 5 times [2023-12-15 16:59:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 16:59:36,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942159272] [2023-12-15 16:59:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 16:59:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 16:59:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 16:59:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8648 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7567 trivial. 0 not checked. [2023-12-15 16:59:39,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 16:59:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942159272] [2023-12-15 16:59:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942159272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 16:59:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97317153] [2023-12-15 16:59:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 16:59:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 16:59:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 16:59:39,300 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) [2023-12-15 16:59:39,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 17:00:31,775 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:00:31,775 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:00:32,782 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 [2023-12-15 17:00:32,976 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2023-12-15 17:00:32,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 17:00:32,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 17:00:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-12-15 17:00:32,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642368652] [2023-12-15 17:00:32,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 17:00:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-15 17:00:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:00:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-15 17:00:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 17:00:32,987 INFO L87 Difference]: Start difference. First operand 390 states and 398 transitions. Second operand has 49 states, 49 states have (on average 1.489795918367347) internal successors, (73), 48 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:00:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:00:32,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2023-12-15 17:00:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-15 17:00:33,008 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:00:33,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:00:33,009 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:00:33,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 17:00:33,010 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (390states) and FLOYD_HOARE automaton (currently 2 states, 49 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-15 17:00:33,017 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-12-15 17:00:33,018 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:00:33,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:00:33 BoogieIcfgContainer [2023-12-15 17:00:33,021 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:00:33,021 INFO L158 Benchmark]: Toolchain (without parser) took 77024.11ms. Allocated memory was 295.7MB in the beginning and 355.5MB in the end (delta: 59.8MB). Free memory was 243.0MB in the beginning and 197.0MB in the end (delta: 46.0MB). Peak memory consumption was 105.8MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,022 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:00:33,022 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.68ms. Allocated memory is still 295.7MB. Free memory was 243.0MB in the beginning and 231.7MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,022 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.94ms. Allocated memory is still 295.7MB. Free memory was 231.7MB in the beginning and 230.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,022 INFO L158 Benchmark]: Boogie Preprocessor took 36.63ms. Allocated memory is still 295.7MB. Free memory was 230.2MB in the beginning and 228.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,022 INFO L158 Benchmark]: RCFGBuilder took 286.81ms. Allocated memory is still 295.7MB. Free memory was 228.1MB in the beginning and 215.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,025 INFO L158 Benchmark]: TraceAbstraction took 76426.65ms. Allocated memory was 295.7MB in the beginning and 355.5MB in the end (delta: 59.8MB). Free memory was 215.0MB in the beginning and 197.0MB in the end (delta: 17.9MB). Peak memory consumption was 77.5MB. Max. memory is 8.0GB. [2023-12-15 17:00:33,027 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.68ms. Allocated memory is still 295.7MB. Free memory was 243.0MB in the beginning and 231.7MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.94ms. Allocated memory is still 295.7MB. Free memory was 231.7MB in the beginning and 230.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.63ms. Allocated memory is still 295.7MB. Free memory was 230.2MB in the beginning and 228.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 286.81ms. Allocated memory is still 295.7MB. Free memory was 228.1MB in the beginning and 215.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 76426.65ms. Allocated memory was 295.7MB in the beginning and 355.5MB in the end (delta: 59.8MB). Free memory was 215.0MB in the beginning and 197.0MB in the end (delta: 17.9MB). Peak memory consumption was 77.5MB. 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 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (390states) and FLOYD_HOARE automaton (currently 2 states, 49 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 76.4s, OverallIterations: 6, TraceHistogramMax: 46, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 162 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 61 mSDsCounter, 2098 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 832 IncrementalHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2098 mSolverCounterUnsat, 101 mSDtfsCounter, 832 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 839 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=5, InterpolantAutomatonStates: 93, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 13.9s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 1160 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1864 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2332 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 14 InterpolantComputations, 1 PerfectInterpolantSequences, 14266/16304 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown