/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 04:00:32,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 04:00:32,145 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 04:00:32,150 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 04:00:32,150 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 04:00:32,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 04:00:32,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 04:00:32,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 04:00:32,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 04:00:32,176 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 04:00:32,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 04:00:32,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 04:00:32,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 04:00:32,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 04:00:32,178 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 04:00:32,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 04:00:32,178 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 04:00:32,178 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 04:00:32,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 04:00:32,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 04:00:32,180 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 04:00:32,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 04:00:32,180 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 04:00:32,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 04:00:32,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 04:00:32,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 04:00:32,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:00:32,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 04:00:32,182 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 04:00:32,183 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 04:00:32,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 04:00:32,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 04:00:32,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 04:00:32,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 04:00:32,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 04:00:32,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 04:00:32,379 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 04:00:32,380 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 04:00:32,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2023-12-21 04:00:33,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 04:00:33,580 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 04:00:33,580 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2023-12-21 04:00:33,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e56f54e/f9c3b2c2054642b8ade5707a64b1636b/FLAGb608f37ab [2023-12-21 04:00:33,596 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e56f54e/f9c3b2c2054642b8ade5707a64b1636b [2023-12-21 04:00:33,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 04:00:33,599 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 04:00:33,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 04:00:33,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 04:00:33,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 04:00:33,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea72429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33, skipping insertion in model container [2023-12-21 04:00:33,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,618 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 04:00:33,719 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2023-12-21 04:00:33,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:00:33,741 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 04:00:33,748 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2023-12-21 04:00:33,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 04:00:33,762 INFO L206 MainTranslator]: Completed translation [2023-12-21 04:00:33,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33 WrapperNode [2023-12-21 04:00:33,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 04:00:33,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 04:00:33,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 04:00:33,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 04:00:33,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,772 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,799 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-12-21 04:00:33,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 04:00:33,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 04:00:33,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 04:00:33,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 04:00:33,807 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,808 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,824 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2023-12-21 04:00:33,824 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 04:00:33,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 04:00:33,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 04:00:33,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 04:00:33,848 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (1/1) ... [2023-12-21 04:00:33,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 04:00:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:00:33,870 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) [2023-12-21 04:00:33,873 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 [2023-12-21 04:00:33,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 04:00:33,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 04:00:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 04:00:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 04:00:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 04:00:33,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 04:00:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 04:00:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 04:00:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 04:00:33,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 04:00:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 04:00:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 04:00:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 04:00:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 04:00:33,989 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 04:00:33,991 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 04:00:34,128 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 04:00:34,158 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 04:00:34,158 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 04:00:34,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:00:34 BoogieIcfgContainer [2023-12-21 04:00:34,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 04:00:34,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 04:00:34,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 04:00:34,162 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 04:00:34,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:00:33" (1/3) ... [2023-12-21 04:00:34,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:00:34, skipping insertion in model container [2023-12-21 04:00:34,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:00:33" (2/3) ... [2023-12-21 04:00:34,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:00:34, skipping insertion in model container [2023-12-21 04:00:34,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:00:34" (3/3) ... [2023-12-21 04:00:34,165 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2023-12-21 04:00:34,178 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 04:00:34,178 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 04:00:34,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 04:00:34,250 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;@6cb56f9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 04:00:34,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 04:00:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 04:00:34,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:34,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:34,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:34,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2067232828, now seen corresponding path program 1 times [2023-12-21 04:00:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:34,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976700539] [2023-12-21 04:00:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:34,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:34,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976700539] [2023-12-21 04:00:34,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976700539] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:00:34,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:00:34,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 04:00:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299101089] [2023-12-21 04:00:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:00:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 04:00:34,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 04:00:34,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:00:34,480 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:34,526 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2023-12-21 04:00:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 04:00:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-21 04:00:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:34,535 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:00:34,535 INFO L226 Difference]: Without dead ends: 12 [2023-12-21 04:00:34,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 04:00:34,541 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:34,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:00:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-21 04:00:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-21 04:00:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-12-21 04:00:34,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2023-12-21 04:00:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:34,564 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-12-21 04:00:34,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-12-21 04:00:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 04:00:34,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:34,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:34,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 04:00:34,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:34,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1872196922, now seen corresponding path program 1 times [2023-12-21 04:00:34,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481136335] [2023-12-21 04:00:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481136335] [2023-12-21 04:00:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481136335] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:00:34,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:00:34,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 04:00:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364199802] [2023-12-21 04:00:34,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:00:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:00:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:00:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:00:34,716 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:34,738 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-12-21 04:00:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:00:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-12-21 04:00:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:34,739 INFO L225 Difference]: With dead ends: 26 [2023-12-21 04:00:34,739 INFO L226 Difference]: Without dead ends: 18 [2023-12-21 04:00:34,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:00:34,740 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:34,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:00:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-21 04:00:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-12-21 04:00:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-21 04:00:34,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-12-21 04:00:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:34,744 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-21 04:00:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-21 04:00:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 04:00:34,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:34,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:34,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 04:00:34,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1967805763, now seen corresponding path program 1 times [2023-12-21 04:00:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121010945] [2023-12-21 04:00:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 04:00:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121010945] [2023-12-21 04:00:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121010945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 04:00:34,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 04:00:34,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 04:00:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867886157] [2023-12-21 04:00:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 04:00:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 04:00:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 04:00:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 04:00:34,801 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:34,830 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-12-21 04:00:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 04:00:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-21 04:00:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:34,831 INFO L225 Difference]: With dead ends: 20 [2023-12-21 04:00:34,831 INFO L226 Difference]: Without dead ends: 14 [2023-12-21 04:00:34,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-21 04:00:34,832 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:34,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:00:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-21 04:00:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-21 04:00:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-12-21 04:00:34,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-12-21 04:00:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:34,835 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-12-21 04:00:34,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-12-21 04:00:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 04:00:34,836 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:34,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:34,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 04:00:34,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:34,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash 293729291, now seen corresponding path program 1 times [2023-12-21 04:00:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:34,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696609388] [2023-12-21 04:00:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:34,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696609388] [2023-12-21 04:00:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696609388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:00:35,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060456390] [2023-12-21 04:00:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:35,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:00:35,378 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) [2023-12-21 04:00:35,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 04:00:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:35,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-21 04:00:35,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:00:35,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 04:00:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:35,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:00:35,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 04:00:35,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-21 04:00:35,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-12-21 04:00:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060456390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:00:35,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:00:35,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-12-21 04:00:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440353333] [2023-12-21 04:00:35,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:00:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 04:00:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 04:00:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-12-21 04:00:35,792 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:35,994 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-12-21 04:00:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 04:00:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 04:00:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:35,995 INFO L225 Difference]: With dead ends: 34 [2023-12-21 04:00:35,995 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 04:00:35,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2023-12-21 04:00:35,996 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:35,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:00:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 04:00:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-12-21 04:00:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-21 04:00:35,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2023-12-21 04:00:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:35,999 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-21 04:00:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-21 04:00:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 04:00:35,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:35,999 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:36,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 04:00:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:36,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:36,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -571943730, now seen corresponding path program 2 times [2023-12-21 04:00:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:36,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501832437] [2023-12-21 04:00:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501832437] [2023-12-21 04:00:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501832437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:00:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000762706] [2023-12-21 04:00:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 04:00:36,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:00:36,285 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) [2023-12-21 04:00:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 04:00:36,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 04:00:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:00:36,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 04:00:36,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:00:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:36,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:00:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000762706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:00:36,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:00:36,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-12-21 04:00:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907738112] [2023-12-21 04:00:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:00:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 04:00:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 04:00:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 04:00:36,466 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:36,504 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-12-21 04:00:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 04:00:36,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-21 04:00:36,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:36,505 INFO L225 Difference]: With dead ends: 27 [2023-12-21 04:00:36,505 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 04:00:36,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-21 04:00:36,507 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:36,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 04:00:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 04:00:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-12-21 04:00:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-12-21 04:00:36,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2023-12-21 04:00:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:36,518 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-12-21 04:00:36,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-21 04:00:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 04:00:36,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:36,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:36,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 04:00:36,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:36,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:36,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash 615779354, now seen corresponding path program 3 times [2023-12-21 04:00:36,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:36,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897112417] [2023-12-21 04:00:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:37,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897112417] [2023-12-21 04:00:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897112417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:00:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777282318] [2023-12-21 04:00:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 04:00:37,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:00:37,061 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) [2023-12-21 04:00:37,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 04:00:37,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 04:00:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:00:37,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-21 04:00:37,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:00:37,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-12-21 04:00:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:37,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:00:37,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 04:00:37,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-21 04:00:37,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-12-21 04:00:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777282318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:00:37,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:00:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-12-21 04:00:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271002147] [2023-12-21 04:00:37,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:00:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 04:00:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:37,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 04:00:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-12-21 04:00:37,417 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:37,764 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-21 04:00:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 04:00:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 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 14 [2023-12-21 04:00:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:37,765 INFO L225 Difference]: With dead ends: 49 [2023-12-21 04:00:37,765 INFO L226 Difference]: Without dead ends: 47 [2023-12-21 04:00:37,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 04:00:37,766 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 89 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:37,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 95 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 04:00:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-21 04:00:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2023-12-21 04:00:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-21 04:00:37,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2023-12-21 04:00:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:37,771 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-21 04:00:37,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-21 04:00:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 04:00:37,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:37,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:37,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 04:00:37,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:37,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:37,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1927661597, now seen corresponding path program 4 times [2023-12-21 04:00:37,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:37,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888260415] [2023-12-21 04:00:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 04:00:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 04:00:38,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 04:00:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888260415] [2023-12-21 04:00:38,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888260415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 04:00:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376711240] [2023-12-21 04:00:38,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 04:00:38,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 04:00:38,040 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) [2023-12-21 04:00:38,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 04:00:38,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 04:00:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 04:00:38,084 WARN L260 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-21 04:00:38,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 04:00:38,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-12-21 04:00:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:00:38,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 04:00:38,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-21 04:00:38,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-12-21 04:00:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 04:00:38,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376711240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 04:00:38,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 04:00:38,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-12-21 04:00:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549445569] [2023-12-21 04:00:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 04:00:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 04:00:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 04:00:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 04:00:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-21 04:00:38,254 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 04:00:39,020 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-21 04:00:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-21 04:00:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 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 15 [2023-12-21 04:00:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 04:00:39,021 INFO L225 Difference]: With dead ends: 87 [2023-12-21 04:00:39,021 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 04:00:39,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=2659, Unknown=0, NotChecked=0, Total=3306 [2023-12-21 04:00:39,023 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 156 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 04:00:39,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 122 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 04:00:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 04:00:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 34. [2023-12-21 04:00:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-12-21 04:00:39,031 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 15 [2023-12-21 04:00:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 04:00:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-12-21 04:00:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 04:00:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-12-21 04:00:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 04:00:39,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 04:00:39,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 04:00:39,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 04:00:39,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:39,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 04:00:39,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 04:00:39,238 INFO L85 PathProgramCache]: Analyzing trace with hash 882552842, now seen corresponding path program 1 times [2023-12-21 04:00:39,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 04:00:39,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611843385] [2023-12-21 04:00:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 04:00:39,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 04:00:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 04:00:39,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 04:00:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 04:00:39,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 04:00:39,306 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 04:00:39,307 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 04:00:39,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-21 04:00:39,310 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2023-12-21 04:00:39,313 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 04:00:39,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 04:00:39 BoogieIcfgContainer [2023-12-21 04:00:39,343 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 04:00:39,343 INFO L158 Benchmark]: Toolchain (without parser) took 5744.67ms. Allocated memory was 282.1MB in the beginning and 353.4MB in the end (delta: 71.3MB). Free memory was 226.8MB in the beginning and 240.1MB in the end (delta: -13.3MB). Peak memory consumption was 59.6MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 212.9MB. Free memory is still 162.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.04ms. Allocated memory is still 282.1MB. Free memory was 226.5MB in the beginning and 214.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.63ms. Allocated memory is still 282.1MB. Free memory was 214.9MB in the beginning and 213.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: Boogie Preprocessor took 46.46ms. Allocated memory is still 282.1MB. Free memory was 213.3MB in the beginning and 211.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: RCFGBuilder took 311.00ms. Allocated memory is still 282.1MB. Free memory was 211.3MB in the beginning and 198.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,344 INFO L158 Benchmark]: TraceAbstraction took 5183.30ms. Allocated memory was 282.1MB in the beginning and 353.4MB in the end (delta: 71.3MB). Free memory was 197.9MB in the beginning and 240.1MB in the end (delta: -42.2MB). Peak memory consumption was 30.2MB. Max. memory is 8.0GB. [2023-12-21 04:00:39,345 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 212.9MB. Free memory is still 162.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 163.04ms. Allocated memory is still 282.1MB. Free memory was 226.5MB in the beginning and 214.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.63ms. Allocated memory is still 282.1MB. Free memory was 214.9MB in the beginning and 213.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 46.46ms. Allocated memory is still 282.1MB. Free memory was 213.3MB in the beginning and 211.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 311.00ms. Allocated memory is still 282.1MB. Free memory was 211.3MB in the beginning and 198.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 5183.30ms. Allocated memory was 282.1MB in the beginning and 353.4MB in the end (delta: 71.3MB). Free memory was 197.9MB in the beginning and 240.1MB in the end (delta: -42.2MB). Peak memory consumption was 30.2MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) VAL [MAX=2] [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 VAL [MAX=2, cont=0, i=0, str1={5:0}, str2={4:0}] [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [MAX=2, cont=0, i=0, j=1, str1={5:0}, str2={4:0}] [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [MAX=2, cont=0, i=-1, j=2, str1={5:0}, str2={4:0}] [L29] COND FALSE !(i >= 0) VAL [MAX=2, cont=0, i=-1, j=2, str1={5:0}, str2={4:0}] [L34] j = MAX-1 [L35] i=0 VAL [MAX=2, cont=0, i=0, j=1, str1={5:0}, str2={4:0}] [L35] COND TRUE i