/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_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 17:17:35,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 17:17:35,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 17:17:35,265 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 17:17:35,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 17:17:35,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 17:17:35,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 17:17:35,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 17:17:35,297 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 17:17:35,298 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 17:17:35,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 17:17:35,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 17:17:35,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 17:17:35,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 17:17:35,299 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 17:17:35,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 17:17:35,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 17:17:35,300 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 17:17:35,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 17:17:35,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 17:17:35,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 17:17:35,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 17:17:35,304 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 17:17:35,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 17:17:35,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 17:17:35,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 17:17:35,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 17:17:35,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 17:17:35,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 17:17:35,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 17:17:35,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 17:17:35,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 17:17:35,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 17:17:35,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 17:17:35,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 17:17:35,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 17:17:35,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 17:17:35,526 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 17:17:35,526 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 17:17:35,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2023-12-18 17:17:36,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 17:17:36,674 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 17:17:36,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2023-12-18 17:17:36,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443574798/6b9f267302494f3895e778c40eb6e46f/FLAG271a50cac [2023-12-18 17:17:36,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/443574798/6b9f267302494f3895e778c40eb6e46f [2023-12-18 17:17:36,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 17:17:36,708 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 17:17:36,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 17:17:36,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 17:17:36,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 17:17:36,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224ecfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36, skipping insertion in model container [2023-12-18 17:17:36,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 17:17:36,845 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_partial_init_ground.i[821,834] [2023-12-18 17:17:36,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 17:17:36,863 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 17:17:36,871 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_partial_init_ground.i[821,834] [2023-12-18 17:17:36,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 17:17:36,896 INFO L206 MainTranslator]: Completed translation [2023-12-18 17:17:36,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36 WrapperNode [2023-12-18 17:17:36,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 17:17:36,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 17:17:36,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 17:17:36,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 17:17:36,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,926 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,939 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-12-18 17:17:36,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 17:17:36,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 17:17:36,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 17:17:36,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 17:17:36,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,950 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,959 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-12-18 17:17:36,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,959 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,964 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,967 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,967 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 17:17:36,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 17:17:36,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 17:17:36,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 17:17:36,970 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (1/1) ... [2023-12-18 17:17:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 17:17:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:36,994 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) [2023-12-18 17:17:37,012 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 [2023-12-18 17:17:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 17:17:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 17:17:37,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 17:17:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 17:17:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 17:17:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 17:17:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 17:17:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-18 17:17:37,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-18 17:17:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 17:17:37,072 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 17:17:37,074 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 17:17:37,211 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 17:17:37,234 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 17:17:37,234 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-18 17:17:37,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:17:37 BoogieIcfgContainer [2023-12-18 17:17:37,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 17:17:37,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 17:17:37,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 17:17:37,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 17:17:37,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 05:17:36" (1/3) ... [2023-12-18 17:17:37,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a03a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:17:37, skipping insertion in model container [2023-12-18 17:17:37,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:17:36" (2/3) ... [2023-12-18 17:17:37,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a03a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:17:37, skipping insertion in model container [2023-12-18 17:17:37,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:17:37" (3/3) ... [2023-12-18 17:17:37,240 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2023-12-18 17:17:37,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 17:17:37,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 17:17:37,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 17:17:37,288 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;@3a6938e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 17:17:37,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 17:17:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2023-12-18 17:17:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 17:17:37,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:37,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:37,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:37,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:37,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1299260800, now seen corresponding path program 1 times [2023-12-18 17:17:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:37,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366717017] [2023-12-18 17:17:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:37,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 17:17:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366717017] [2023-12-18 17:17:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366717017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 17:17:37,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 17:17:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 17:17:37,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478724441] [2023-12-18 17:17:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 17:17:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 17:17:37,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:17:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 17:17:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 17:17:37,507 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 17:17:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:17:37,557 INFO L93 Difference]: Finished difference Result 46 states and 71 transitions. [2023-12-18 17:17:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 17:17:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2023-12-18 17:17:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:17:37,564 INFO L225 Difference]: With dead ends: 46 [2023-12-18 17:17:37,564 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 17:17:37,566 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 [2023-12-18 17:17:37,568 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 17:17:37,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 17:17:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 17:17:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-18 17:17:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-12-18 17:17:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-18 17:17:37,592 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2023-12-18 17:17:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:17:37,592 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-18 17:17:37,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 17:17:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-18 17:17:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 17:17:37,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:37,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:37,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 17:17:37,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:37,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:37,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1656475808, now seen corresponding path program 1 times [2023-12-18 17:17:37,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:37,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144195381] [2023-12-18 17:17:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:17:37,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144195381] [2023-12-18 17:17:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144195381] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:17:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231315271] [2023-12-18 17:17:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:37,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:17:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:37,705 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) [2023-12-18 17:17:37,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 17:17:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:37,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 17:17:37,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:17:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:17:37,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:17:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 17:17:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231315271] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:17:37,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:17:37,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-18 17:17:37,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225119957] [2023-12-18 17:17:37,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:17:37,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 17:17:37,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:17:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 17:17:37,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 17:17:37,873 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-12-18 17:17:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:17:37,927 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-12-18 17:17:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 17:17:37,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 14 [2023-12-18 17:17:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:17:37,928 INFO L225 Difference]: With dead ends: 53 [2023-12-18 17:17:37,928 INFO L226 Difference]: Without dead ends: 34 [2023-12-18 17:17:37,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-18 17:17:37,931 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 17:17:37,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 17:17:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-18 17:17:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-18 17:17:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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) [2023-12-18 17:17:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-12-18 17:17:37,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 14 [2023-12-18 17:17:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:17:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-12-18 17:17:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-12-18 17:17:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-12-18 17:17:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 17:17:37,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:37,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:37,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 17:17:38,148 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 [2023-12-18 17:17:38,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:38,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:38,150 INFO L85 PathProgramCache]: Analyzing trace with hash 431622133, now seen corresponding path program 2 times [2023-12-18 17:17:38,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:38,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044465295] [2023-12-18 17:17:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:38,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 17:17:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044465295] [2023-12-18 17:17:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044465295] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:17:38,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291262237] [2023-12-18 17:17:38,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 17:17:38,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:17:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:38,364 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) [2023-12-18 17:17:38,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 17:17:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 17:17:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:17:38,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 17:17:38,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:17:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 17:17:38,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:17:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-18 17:17:38,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291262237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:17:38,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:17:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-18 17:17:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609974115] [2023-12-18 17:17:38,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:17:38,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 17:17:38,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:17:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 17:17:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 17:17:38,501 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2023-12-18 17:17:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:17:38,576 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2023-12-18 17:17:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 17:17:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 26 [2023-12-18 17:17:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:17:38,579 INFO L225 Difference]: With dead ends: 86 [2023-12-18 17:17:38,579 INFO L226 Difference]: Without dead ends: 58 [2023-12-18 17:17:38,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-18 17:17:38,582 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 17:17:38,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 69 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 17:17:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-18 17:17:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-18 17:17:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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) [2023-12-18 17:17:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2023-12-18 17:17:38,596 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 26 [2023-12-18 17:17:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:17:38,596 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2023-12-18 17:17:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2023-12-18 17:17:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2023-12-18 17:17:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 17:17:38,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:38,597 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:38,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 17:17:38,816 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 [2023-12-18 17:17:38,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:38,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1875241429, now seen corresponding path program 3 times [2023-12-18 17:17:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157556067] [2023-12-18 17:17:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 17:17:39,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157556067] [2023-12-18 17:17:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157556067] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:17:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336898255] [2023-12-18 17:17:39,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 17:17:39,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:17:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:39,126 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) [2023-12-18 17:17:39,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 17:17:39,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 17:17:39,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:17:39,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 17:17:39,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:17:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 17:17:39,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:17:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-18 17:17:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336898255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:17:39,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:17:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-18 17:17:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729320782] [2023-12-18 17:17:39,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:17:39,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-18 17:17:39,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:17:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-18 17:17:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 17:17:39,795 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 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) [2023-12-18 17:17:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:17:39,920 INFO L93 Difference]: Finished difference Result 152 states and 215 transitions. [2023-12-18 17:17:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 17:17:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 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 50 [2023-12-18 17:17:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:17:39,921 INFO L225 Difference]: With dead ends: 152 [2023-12-18 17:17:39,921 INFO L226 Difference]: Without dead ends: 106 [2023-12-18 17:17:39,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-18 17:17:39,922 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 183 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 17:17:39,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 124 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 17:17:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-18 17:17:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-12-18 17:17:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 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) [2023-12-18 17:17:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2023-12-18 17:17:39,929 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 50 [2023-12-18 17:17:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:17:39,930 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2023-12-18 17:17:39,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 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) [2023-12-18 17:17:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2023-12-18 17:17:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-18 17:17:39,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:39,932 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:39,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 17:17:40,138 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 [2023-12-18 17:17:40,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:40,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2000476779, now seen corresponding path program 4 times [2023-12-18 17:17:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:40,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181093181] [2023-12-18 17:17:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-12-18 17:17:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:40,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181093181] [2023-12-18 17:17:40,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181093181] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:17:40,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748509050] [2023-12-18 17:17:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 17:17:40,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:17:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:40,850 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) [2023-12-18 17:17:40,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 17:17:41,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 17:17:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 17:17:41,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 17:17:41,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 17:17:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-18 17:17:41,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 17:17:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-18 17:17:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748509050] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 17:17:41,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 17:17:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2023-12-18 17:17:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641508093] [2023-12-18 17:17:41,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 17:17:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 17:17:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:17:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 17:17:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:17:41,954 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 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) [2023-12-18 17:17:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 17:17:42,213 INFO L93 Difference]: Finished difference Result 284 states and 407 transitions. [2023-12-18 17:17:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 17:17:42,213 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 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 98 [2023-12-18 17:17:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 17:17:42,214 INFO L225 Difference]: With dead ends: 284 [2023-12-18 17:17:42,215 INFO L226 Difference]: Without dead ends: 202 [2023-12-18 17:17:42,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:17:42,216 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 17:17:42,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 105 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 17:17:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-18 17:17:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-12-18 17:17:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 198 states have internal predecessors, (248), 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) [2023-12-18 17:17:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 252 transitions. [2023-12-18 17:17:42,226 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 252 transitions. Word has length 98 [2023-12-18 17:17:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 17:17:42,226 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 252 transitions. [2023-12-18 17:17:42,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 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) [2023-12-18 17:17:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 252 transitions. [2023-12-18 17:17:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-12-18 17:17:42,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 17:17:42,228 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 17:17:42,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 17:17:42,435 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 [2023-12-18 17:17:42,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 17:17:42,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 17:17:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 16481557, now seen corresponding path program 5 times [2023-12-18 17:17:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 17:17:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473484294] [2023-12-18 17:17:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 17:17:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 17:17:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 17:17:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-12-18 17:17:44,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 17:17:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473484294] [2023-12-18 17:17:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473484294] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 17:17:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238799724] [2023-12-18 17:17:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 17:17:44,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:17:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 17:17:44,678 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) [2023-12-18 17:17:44,704 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... [2023-12-18 17:32:23,775 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 [2023-12-18 17:32:23,775 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 [2023-12-18 17:32:24,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 [2023-12-18 17:32:24,975 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2023-12-18 17:32:25,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 17:32:25,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 17:32:25,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-12-18 17:32:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239601322] [2023-12-18 17:32:25,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 17:32:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 17:32:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 17:32:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 17:32:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:32:25,007 INFO L87 Difference]: Start difference. First operand 202 states and 252 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 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) [2023-12-18 17:32:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 17:32:25,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 17:32:25,030 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 [2023-12-18 17:32:25,030 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] [2023-12-18 17:32:25,032 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 17:32:25,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 17:32:25,033 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (202states) and FLOYD_HOARE automaton (currently 2 states, 49 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 17:32:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2023-12-18 17:32:25,037 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-12-18 17:32:25,039 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 17:32:25,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 05:32:25 BoogieIcfgContainer [2023-12-18 17:32:25,040 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 17:32:25,041 INFO L158 Benchmark]: Toolchain (without parser) took 888332.79ms. Allocated memory was 261.1MB in the beginning and 376.4MB in the end (delta: 115.3MB). Free memory was 220.9MB in the beginning and 260.0MB in the end (delta: -39.0MB). Peak memory consumption was 77.3MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,041 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 217.1MB. Free memory is still 169.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 17:32:25,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.64ms. Allocated memory is still 261.1MB. Free memory was 220.6MB in the beginning and 209.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,041 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.02ms. Allocated memory is still 261.1MB. Free memory was 209.6MB in the beginning and 208.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,041 INFO L158 Benchmark]: Boogie Preprocessor took 29.02ms. Allocated memory is still 261.1MB. Free memory was 208.0MB in the beginning and 205.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,041 INFO L158 Benchmark]: RCFGBuilder took 265.02ms. Allocated memory is still 261.1MB. Free memory was 205.9MB in the beginning and 192.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,042 INFO L158 Benchmark]: TraceAbstraction took 887804.48ms. Allocated memory was 261.1MB in the beginning and 376.4MB in the end (delta: 115.3MB). Free memory was 191.6MB in the beginning and 260.0MB in the end (delta: -68.3MB). Peak memory consumption was 47.9MB. Max. memory is 8.0GB. [2023-12-18 17:32:25,053 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 217.1MB. Free memory is still 169.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.64ms. Allocated memory is still 261.1MB. Free memory was 220.6MB in the beginning and 209.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.02ms. Allocated memory is still 261.1MB. Free memory was 209.6MB in the beginning and 208.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.02ms. Allocated memory is still 261.1MB. Free memory was 208.0MB in the beginning and 205.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 265.02ms. Allocated memory is still 261.1MB. Free memory was 205.9MB in the beginning and 192.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 887804.48ms. Allocated memory was 261.1MB in the beginning and 376.4MB in the end (delta: 115.3MB). Free memory was 191.6MB in the beginning and 260.0MB in the end (delta: -68.3MB). Peak memory consumption was 47.9MB. 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 (202states) 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 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 887.8s, OverallIterations: 6, TraceHistogramMax: 46, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 437 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 278 mSDsCounter, 202 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 425 IncrementalHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 202 mSolverCounterUnsat, 91 mSDtfsCounter, 425 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 463 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 580 NumberOfCodeBlocks, 565 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 1272 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1319 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 14 InterpolantComputations, 1 PerfectInterpolantSequences, 4876/7838 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