/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/heap-data/process_queue.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 03:50:36,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 03:50:36,634 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 03:50:36,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 03:50:36,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 03:50:36,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 03:50:36,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 03:50:36,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 03:50:36,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 03:50:36,651 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 03:50:36,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 03:50:36,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 03:50:36,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 03:50:36,652 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 03:50:36,653 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 03:50:36,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 03:50:36,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 03:50:36,653 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 03:50:36,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 03:50:36,654 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 03:50:36,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 03:50:36,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 03:50:36,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 03:50:36,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 03:50:36,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 03:50:36,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 03:50:36,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 03:50:36,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:50:36,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 03:50:36,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 03:50:36,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 03:50:36,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 03:50:36,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 03:50:36,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 03:50:36,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 03:50:36,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 03:50:36,658 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 03:50:36,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 03:50:36,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 03:50:36,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 03:50:36,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 03:50:36,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 03:50:36,856 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 03:50:36,856 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 03:50:36,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/process_queue.i [2023-12-21 03:50:37,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 03:50:38,108 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 03:50:38,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i [2023-12-21 03:50:38,125 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a40171c/c30c020fef5b4c10b11892619bf2ce79/FLAG425cbcc8a [2023-12-21 03:50:38,134 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a40171c/c30c020fef5b4c10b11892619bf2ce79 [2023-12-21 03:50:38,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 03:50:38,136 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 03:50:38,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 03:50:38,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 03:50:38,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 03:50:38,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ebd160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38, skipping insertion in model container [2023-12-21 03:50:38,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,181 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 03:50:38,378 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i[23979,23992] [2023-12-21 03:50:38,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:50:38,400 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 03:50:38,451 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i[23979,23992] [2023-12-21 03:50:38,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:50:38,478 INFO L206 MainTranslator]: Completed translation [2023-12-21 03:50:38,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38 WrapperNode [2023-12-21 03:50:38,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 03:50:38,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 03:50:38,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 03:50:38,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 03:50:38,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,519 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 115 [2023-12-21 03:50:38,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 03:50:38,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 03:50:38,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 03:50:38,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 03:50:38,527 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,543 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 6, 13]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 7 writes are split as follows [0, 2, 5]. [2023-12-21 03:50:38,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 03:50:38,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 03:50:38,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 03:50:38,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 03:50:38,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (1/1) ... [2023-12-21 03:50:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:50:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:38,589 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 03:50:38,600 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 03:50:38,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 03:50:38,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 03:50:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 03:50:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 03:50:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 03:50:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 03:50:38,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 03:50:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-21 03:50:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 03:50:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 03:50:38,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 03:50:38,754 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 03:50:38,756 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 03:50:38,914 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 03:50:38,959 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 03:50:38,959 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 03:50:38,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:50:38 BoogieIcfgContainer [2023-12-21 03:50:38,959 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 03:50:38,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 03:50:38,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 03:50:38,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 03:50:38,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:50:38" (1/3) ... [2023-12-21 03:50:38,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbd7314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:50:38, skipping insertion in model container [2023-12-21 03:50:38,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:50:38" (2/3) ... [2023-12-21 03:50:38,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbd7314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:50:38, skipping insertion in model container [2023-12-21 03:50:38,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:50:38" (3/3) ... [2023-12-21 03:50:38,979 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2023-12-21 03:50:38,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 03:50:38,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 03:50:39,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 03:50:39,022 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;@6b8423ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 03:50:39,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 03:50:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 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 03:50:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 03:50:39,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:39,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:39,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:39,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -638587651, now seen corresponding path program 1 times [2023-12-21 03:50:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730791455] [2023-12-21 03:50:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:39,190 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 03:50:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730791455] [2023-12-21 03:50:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730791455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:39,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:50:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97925500] [2023-12-21 03:50:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 03:50:39,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 03:50:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 03:50:39,219 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 03:50:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:39,255 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2023-12-21 03:50:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 03:50:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-12-21 03:50:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:39,261 INFO L225 Difference]: With dead ends: 40 [2023-12-21 03:50:39,261 INFO L226 Difference]: Without dead ends: 19 [2023-12-21 03:50:39,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 03:50:39,267 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:39,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-21 03:50:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-21 03:50:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 03:50:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-12-21 03:50:39,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2023-12-21 03:50:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:39,290 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-12-21 03:50:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 03:50:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-12-21 03:50:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 03:50:39,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:39,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 03:50:39,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash -695845953, now seen corresponding path program 1 times [2023-12-21 03:50:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594629471] [2023-12-21 03:50:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:39,712 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 03:50:39,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:39,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594629471] [2023-12-21 03:50:39,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594629471] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:39,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:39,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 03:50:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038981548] [2023-12-21 03:50:39,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 03:50:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 03:50:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:50:39,720 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 03:50:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:39,871 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2023-12-21 03:50:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 03:50:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2023-12-21 03:50:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:39,874 INFO L225 Difference]: With dead ends: 71 [2023-12-21 03:50:39,874 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 03:50:39,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:50:39,875 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:39,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 03:50:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-12-21 03:50:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2023-12-21 03:50:39,885 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 9 [2023-12-21 03:50:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:39,886 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2023-12-21 03:50:39,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 03:50:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2023-12-21 03:50:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 03:50:39,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:39,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:39,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 03:50:39,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:39,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:39,889 INFO L85 PathProgramCache]: Analyzing trace with hash -442026085, now seen corresponding path program 1 times [2023-12-21 03:50:39,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:39,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880732628] [2023-12-21 03:50:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:39,935 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 03:50:39,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:39,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880732628] [2023-12-21 03:50:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880732628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:39,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:50:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598205162] [2023-12-21 03:50:39,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 03:50:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 03:50:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:50:39,946 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:39,992 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2023-12-21 03:50:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 03:50:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:39,994 INFO L225 Difference]: With dead ends: 90 [2023-12-21 03:50:39,995 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 03:50:39,996 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 03:50:39,996 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:39,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 03:50:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-12-21 03:50:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 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 03:50:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-12-21 03:50:40,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 10 [2023-12-21 03:50:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:40,002 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-12-21 03:50:40,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-12-21 03:50:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 03:50:40,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:40,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 03:50:40,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:40,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2077933849, now seen corresponding path program 1 times [2023-12-21 03:50:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042129506] [2023-12-21 03:50:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:40,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:40,092 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 03:50:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042129506] [2023-12-21 03:50:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042129506] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:40,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:50:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308505956] [2023-12-21 03:50:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:40,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 03:50:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 03:50:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:50:40,094 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:40,143 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2023-12-21 03:50:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 03:50:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:40,144 INFO L225 Difference]: With dead ends: 85 [2023-12-21 03:50:40,145 INFO L226 Difference]: Without dead ends: 42 [2023-12-21 03:50:40,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 03:50:40,149 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:40,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-21 03:50:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-21 03:50:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2023-12-21 03:50:40,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 10 [2023-12-21 03:50:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:40,164 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2023-12-21 03:50:40,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:50:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2023-12-21 03:50:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 03:50:40,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:40,165 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-21 03:50:40,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:40,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1864264615, now seen corresponding path program 1 times [2023-12-21 03:50:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413715743] [2023-12-21 03:50:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:40,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:40,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413715743] [2023-12-21 03:50:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413715743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:40,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676713756] [2023-12-21 03:50:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:40,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:40,496 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 03:50:40,543 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 03:50:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:40,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 03:50:40,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:40,740 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 19 treesize of output 11 [2023-12-21 03:50:40,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:40,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 3 [2023-12-21 03:50:40,756 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 19 treesize of output 11 [2023-12-21 03:50:40,774 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 30 treesize of output 18 [2023-12-21 03:50:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:40,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676713756] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:40,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-12-21 03:50:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472175639] [2023-12-21 03:50:40,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 03:50:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 03:50:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:50:40,856 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 03:50:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:41,040 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2023-12-21 03:50:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 03:50:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-21 03:50:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:41,041 INFO L225 Difference]: With dead ends: 77 [2023-12-21 03:50:41,041 INFO L226 Difference]: Without dead ends: 44 [2023-12-21 03:50:41,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-21 03:50:41,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:41,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 109 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-21 03:50:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-12-21 03:50:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 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 03:50:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2023-12-21 03:50:41,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 12 [2023-12-21 03:50:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:41,046 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2023-12-21 03:50:41,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 03:50:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2023-12-21 03:50:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 03:50:41,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:41,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:41,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 03:50:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:41,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:41,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1675409667, now seen corresponding path program 1 times [2023-12-21 03:50:41,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:41,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419499596] [2023-12-21 03:50:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:41,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:41,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:41,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419499596] [2023-12-21 03:50:41,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419499596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:41,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:41,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 03:50:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545905965] [2023-12-21 03:50:41,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 03:50:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 03:50:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:50:41,345 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 03:50:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:41,387 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2023-12-21 03:50:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 03:50:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-21 03:50:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:41,388 INFO L225 Difference]: With dead ends: 96 [2023-12-21 03:50:41,389 INFO L226 Difference]: Without dead ends: 64 [2023-12-21 03:50:41,389 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 03:50:41,389 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:41,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 60 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-21 03:50:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-12-21 03:50:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 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 03:50:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2023-12-21 03:50:41,400 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 16 [2023-12-21 03:50:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:41,400 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2023-12-21 03:50:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 03:50:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2023-12-21 03:50:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-21 03:50:41,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:41,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:41,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-21 03:50:41,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:41,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash -342731749, now seen corresponding path program 1 times [2023-12-21 03:50:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:41,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58196431] [2023-12-21 03:50:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:41,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58196431] [2023-12-21 03:50:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58196431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788763007] [2023-12-21 03:50:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:41,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:41,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:41,670 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 03:50:41,724 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 03:50:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:41,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 03:50:41,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:41,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2023-12-21 03:50:41,876 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 11 treesize of output 7 [2023-12-21 03:50:41,881 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 1 [2023-12-21 03:50:41,895 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 19 treesize of output 11 [2023-12-21 03:50:41,909 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 7 [2023-12-21 03:50:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:41,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:41,951 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 21 treesize of output 19 [2023-12-21 03:50:41,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 03:50:41,957 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 11 treesize of output 7 [2023-12-21 03:50:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:41,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788763007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:41,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:41,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-21 03:50:41,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538807164] [2023-12-21 03:50:41,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:41,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 03:50:41,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 03:50:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-12-21 03:50:41,987 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:50:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:42,419 INFO L93 Difference]: Finished difference Result 261 states and 351 transitions. [2023-12-21 03:50:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 03:50:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) Word has length 19 [2023-12-21 03:50:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:42,420 INFO L225 Difference]: With dead ends: 261 [2023-12-21 03:50:42,420 INFO L226 Difference]: Without dead ends: 212 [2023-12-21 03:50:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2023-12-21 03:50:42,421 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 141 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 193 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 03:50:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-21 03:50:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2023-12-21 03:50:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.3314285714285714) internal successors, (233), 175 states have internal predecessors, (233), 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 03:50:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 233 transitions. [2023-12-21 03:50:42,432 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 233 transitions. Word has length 19 [2023-12-21 03:50:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:42,432 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 233 transitions. [2023-12-21 03:50:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 03:50:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 233 transitions. [2023-12-21 03:50:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 03:50:42,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:42,433 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-21 03:50:42,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-21 03:50:42,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:42,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1180359221, now seen corresponding path program 2 times [2023-12-21 03:50:42,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252631558] [2023-12-21 03:50:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:43,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252631558] [2023-12-21 03:50:43,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252631558] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057198487] [2023-12-21 03:50:43,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:50:43,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:43,164 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 03:50:43,190 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 03:50:43,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:50:43,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:43,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-21 03:50:43,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:43,285 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 11 treesize of output 7 [2023-12-21 03:50:43,289 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 1 [2023-12-21 03:50:43,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:50:43,293 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 16 treesize of output 1 [2023-12-21 03:50:43,396 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 23 treesize of output 15 [2023-12-21 03:50:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:43,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2023-12-21 03:50:43,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 24 [2023-12-21 03:50:43,420 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:50:43,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:50:43,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:43,428 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 19 treesize of output 11 [2023-12-21 03:50:43,453 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 50 treesize of output 30 [2023-12-21 03:50:43,490 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 27 treesize of output 15 [2023-12-21 03:50:43,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:50:43,511 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 7 [2023-12-21 03:50:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:43,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:43,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057198487] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:43,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:43,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-12-21 03:50:43,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269837960] [2023-12-21 03:50:43,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 03:50:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 03:50:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=467, Unknown=1, NotChecked=0, Total=552 [2023-12-21 03:50:43,802 INFO L87 Difference]: Start difference. First operand 176 states and 233 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 03:50:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:45,486 INFO L93 Difference]: Finished difference Result 548 states and 732 transitions. [2023-12-21 03:50:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 03:50:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 22 [2023-12-21 03:50:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:45,488 INFO L225 Difference]: With dead ends: 548 [2023-12-21 03:50:45,488 INFO L226 Difference]: Without dead ends: 393 [2023-12-21 03:50:45,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=656, Invalid=2313, Unknown=1, NotChecked=0, Total=2970 [2023-12-21 03:50:45,489 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 327 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:45,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 502 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 03:50:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-21 03:50:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 232. [2023-12-21 03:50:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.329004329004329) internal successors, (307), 231 states have internal predecessors, (307), 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 03:50:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2023-12-21 03:50:45,505 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 22 [2023-12-21 03:50:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2023-12-21 03:50:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 03:50:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2023-12-21 03:50:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 03:50:45,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:45,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:45,517 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 03:50:45,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:45,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:45,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash 858311097, now seen corresponding path program 1 times [2023-12-21 03:50:45,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:45,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675718507] [2023-12-21 03:50:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:45,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:50:45,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675718507] [2023-12-21 03:50:45,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675718507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81833284] [2023-12-21 03:50:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:45,759 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 03:50:45,783 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 03:50:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:45,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 03:50:45,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:50:45,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:50:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81833284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:45,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:45,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-21 03:50:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944906243] [2023-12-21 03:50:45,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 03:50:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 03:50:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:50:45,920 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 03:50:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:46,014 INFO L93 Difference]: Finished difference Result 673 states and 910 transitions. [2023-12-21 03:50:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 03:50:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 25 [2023-12-21 03:50:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:46,015 INFO L225 Difference]: With dead ends: 673 [2023-12-21 03:50:46,015 INFO L226 Difference]: Without dead ends: 460 [2023-12-21 03:50:46,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-12-21 03:50:46,016 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:46,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 121 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-12-21 03:50:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 364. [2023-12-21 03:50:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.325068870523416) internal successors, (481), 363 states have internal predecessors, (481), 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 03:50:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 481 transitions. [2023-12-21 03:50:46,041 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 481 transitions. Word has length 25 [2023-12-21 03:50:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:46,041 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 481 transitions. [2023-12-21 03:50:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 03:50:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 481 transitions. [2023-12-21 03:50:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 03:50:46,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:46,042 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-21 03:50:46,058 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 03:50:46,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:46,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:46,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1180387813, now seen corresponding path program 3 times [2023-12-21 03:50:46,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:46,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344935300] [2023-12-21 03:50:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:46,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344935300] [2023-12-21 03:50:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344935300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546387543] [2023-12-21 03:50:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:50:46,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:46,820 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) [2023-12-21 03:50:46,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 03:50:47,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 03:50:47,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:47,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-21 03:50:47,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:47,064 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 19 treesize of output 11 [2023-12-21 03:50:47,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:50:47,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 3 [2023-12-21 03:50:47,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:47,082 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 19 treesize of output 11 [2023-12-21 03:50:47,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 64 treesize of output 33 [2023-12-21 03:50:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:47,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-12-21 03:50:47,175 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:50:47,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:50:47,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:50:47,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2023-12-21 03:50:47,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:50:47,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:47,214 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 65 treesize of output 41 [2023-12-21 03:50:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:47,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:47,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:47,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2023-12-21 03:50:47,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:47,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-12-21 03:50:47,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-21 03:50:47,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-21 03:50:47,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:47,643 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-21 03:50:47,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:50:47,646 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 20 treesize of output 12 [2023-12-21 03:50:47,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:47,653 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2023-12-21 03:50:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:50:47,656 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 24 treesize of output 12 [2023-12-21 03:50:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546387543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:47,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:47,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2023-12-21 03:50:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936074469] [2023-12-21 03:50:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:47,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 03:50:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 03:50:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-12-21 03:50:47,673 INFO L87 Difference]: Start difference. First operand 364 states and 481 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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 03:50:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:48,229 INFO L93 Difference]: Finished difference Result 765 states and 1016 transitions. [2023-12-21 03:50:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 03:50:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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 25 [2023-12-21 03:50:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:48,231 INFO L225 Difference]: With dead ends: 765 [2023-12-21 03:50:48,231 INFO L226 Difference]: Without dead ends: 434 [2023-12-21 03:50:48,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-12-21 03:50:48,232 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:48,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 317 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 03:50:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-12-21 03:50:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2023-12-21 03:50:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.3049645390070923) internal successors, (552), 423 states have internal predecessors, (552), 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 03:50:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 552 transitions. [2023-12-21 03:50:48,252 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 552 transitions. Word has length 25 [2023-12-21 03:50:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:48,252 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 552 transitions. [2023-12-21 03:50:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 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 03:50:48,252 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 552 transitions. [2023-12-21 03:50:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 03:50:48,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:48,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:48,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 03:50:48,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:48,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 600145659, now seen corresponding path program 1 times [2023-12-21 03:50:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246970543] [2023-12-21 03:50:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246970543] [2023-12-21 03:50:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246970543] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827757009] [2023-12-21 03:50:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:48,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:48,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 03:50:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:48,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-21 03:50:48,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:48,828 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 1 [2023-12-21 03:50:48,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2023-12-21 03:50:48,835 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 11 treesize of output 7 [2023-12-21 03:50:48,916 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 19 treesize of output 11 [2023-12-21 03:50:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:48,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:48,988 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 19 treesize of output 17 [2023-12-21 03:50:48,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:48,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2023-12-21 03:50:48,995 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 12 treesize of output 8 [2023-12-21 03:50:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827757009] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:48,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:48,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-12-21 03:50:48,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895673859] [2023-12-21 03:50:48,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:48,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 03:50:48,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 03:50:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-21 03:50:48,999 INFO L87 Difference]: Start difference. First operand 424 states and 552 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:49,225 INFO L93 Difference]: Finished difference Result 847 states and 1108 transitions. [2023-12-21 03:50:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 03:50:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-21 03:50:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:49,227 INFO L225 Difference]: With dead ends: 847 [2023-12-21 03:50:49,227 INFO L226 Difference]: Without dead ends: 516 [2023-12-21 03:50:49,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-12-21 03:50:49,228 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:49,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 141 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 03:50:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-12-21 03:50:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 471. [2023-12-21 03:50:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.297872340425532) internal successors, (610), 470 states have internal predecessors, (610), 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 03:50:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 610 transitions. [2023-12-21 03:50:49,253 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 610 transitions. Word has length 25 [2023-12-21 03:50:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:49,253 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 610 transitions. [2023-12-21 03:50:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 610 transitions. [2023-12-21 03:50:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 03:50:49,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:49,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:49,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:49,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:49,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1953335290, now seen corresponding path program 1 times [2023-12-21 03:50:49,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:49,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519680716] [2023-12-21 03:50:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:49,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 03:50:49,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:49,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519680716] [2023-12-21 03:50:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519680716] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55292349] [2023-12-21 03:50:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:49,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:49,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:49,584 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:49,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 03:50:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:49,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 03:50:49,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:49,792 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 03:50:49,796 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 03:50:49,814 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 11 [2023-12-21 03:50:49,817 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 11 [2023-12-21 03:50:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 03:50:49,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:49,906 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 25 treesize of output 21 [2023-12-21 03:50:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:49,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 03:50:49,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55292349] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:49,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:49,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-21 03:50:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313827297] [2023-12-21 03:50:49,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:49,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 03:50:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 03:50:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-21 03:50:49,919 INFO L87 Difference]: Start difference. First operand 471 states and 610 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 03:50:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:50,122 INFO L93 Difference]: Finished difference Result 806 states and 1061 transitions. [2023-12-21 03:50:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 03:50:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 26 [2023-12-21 03:50:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:50,125 INFO L225 Difference]: With dead ends: 806 [2023-12-21 03:50:50,125 INFO L226 Difference]: Without dead ends: 341 [2023-12-21 03:50:50,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-12-21 03:50:50,130 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:50,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 87 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-12-21 03:50:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 282. [2023-12-21 03:50:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.298932384341637) internal successors, (365), 281 states have internal predecessors, (365), 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 03:50:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 365 transitions. [2023-12-21 03:50:50,145 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 365 transitions. Word has length 26 [2023-12-21 03:50:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:50,146 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 365 transitions. [2023-12-21 03:50:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 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 03:50:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 365 transitions. [2023-12-21 03:50:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 03:50:50,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:50,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:50,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-21 03:50:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:50,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:50,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1532285380, now seen corresponding path program 1 times [2023-12-21 03:50:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422916199] [2023-12-21 03:50:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 03:50:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422916199] [2023-12-21 03:50:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422916199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:50:50,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:50:50,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:50:50,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562948776] [2023-12-21 03:50:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:50:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-21 03:50:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-21 03:50:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 03:50:50,379 INFO L87 Difference]: Start difference. First operand 282 states and 365 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 03:50:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:50,406 INFO L93 Difference]: Finished difference Result 553 states and 728 transitions. [2023-12-21 03:50:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-21 03:50:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2023-12-21 03:50:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:50,407 INFO L225 Difference]: With dead ends: 553 [2023-12-21 03:50:50,407 INFO L226 Difference]: Without dead ends: 301 [2023-12-21 03:50:50,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-21 03:50:50,408 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:50,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:50:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-21 03:50:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 292. [2023-12-21 03:50:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3127147766323024) internal successors, (382), 291 states have internal predecessors, (382), 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 03:50:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 382 transitions. [2023-12-21 03:50:50,422 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 382 transitions. Word has length 26 [2023-12-21 03:50:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:50,422 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 382 transitions. [2023-12-21 03:50:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 03:50:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 382 transitions. [2023-12-21 03:50:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 03:50:50,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:50,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:50,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-21 03:50:50,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:50,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1394794225, now seen corresponding path program 1 times [2023-12-21 03:50:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:50,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286604436] [2023-12-21 03:50:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:50,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286604436] [2023-12-21 03:50:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286604436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484981018] [2023-12-21 03:50:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:50,606 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:50,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 03:50:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:50,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-21 03:50:50,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:50,786 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 19 treesize of output 11 [2023-12-21 03:50:50,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 3 [2023-12-21 03:50:50,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:50,798 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 19 treesize of output 11 [2023-12-21 03:50:50,873 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 30 treesize of output 18 [2023-12-21 03:50:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:50,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:50,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484981018] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:50,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-12-21 03:50:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010272658] [2023-12-21 03:50:50,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:50,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 03:50:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 03:50:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-21 03:50:50,971 INFO L87 Difference]: Start difference. First operand 292 states and 382 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 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 03:50:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:51,171 INFO L93 Difference]: Finished difference Result 599 states and 785 transitions. [2023-12-21 03:50:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 03:50:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 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 29 [2023-12-21 03:50:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:51,173 INFO L225 Difference]: With dead ends: 599 [2023-12-21 03:50:51,173 INFO L226 Difference]: Without dead ends: 337 [2023-12-21 03:50:51,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-12-21 03:50:51,173 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:51,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 140 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-12-21 03:50:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 320. [2023-12-21 03:50:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3009404388714734) internal successors, (415), 319 states have internal predecessors, (415), 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 03:50:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 415 transitions. [2023-12-21 03:50:51,189 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 415 transitions. Word has length 29 [2023-12-21 03:50:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:51,189 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 415 transitions. [2023-12-21 03:50:51,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 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 03:50:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 415 transitions. [2023-12-21 03:50:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 03:50:51,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:51,190 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-21 03:50:51,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 03:50:51,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:51,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash 546084471, now seen corresponding path program 4 times [2023-12-21 03:50:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511021920] [2023-12-21 03:50:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:50:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511021920] [2023-12-21 03:50:51,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511021920] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765985467] [2023-12-21 03:50:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:50:51,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:51,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:51,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 03:50:51,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:50:51,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:51,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-21 03:50:51,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:51,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:50:51,771 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 11 treesize of output 7 [2023-12-21 03:50:51,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 03:50:51,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 16 [2023-12-21 03:50:51,826 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 20 treesize of output 12 [2023-12-21 03:50:51,835 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 16 treesize of output 8 [2023-12-21 03:50:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:50:51,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:50:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765985467] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:51,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:51,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-12-21 03:50:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931694393] [2023-12-21 03:50:51,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 03:50:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 03:50:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:50:51,864 INFO L87 Difference]: Start difference. First operand 320 states and 415 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:52,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:52,010 INFO L93 Difference]: Finished difference Result 646 states and 841 transitions. [2023-12-21 03:50:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 03:50:52,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-21 03:50:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:52,012 INFO L225 Difference]: With dead ends: 646 [2023-12-21 03:50:52,012 INFO L226 Difference]: Without dead ends: 384 [2023-12-21 03:50:52,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-12-21 03:50:52,013 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:52,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 135 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-12-21 03:50:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 317. [2023-12-21 03:50:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.2816455696202531) internal successors, (405), 316 states have internal predecessors, (405), 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 03:50:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 405 transitions. [2023-12-21 03:50:52,030 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 405 transitions. Word has length 35 [2023-12-21 03:50:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 405 transitions. [2023-12-21 03:50:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:50:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 405 transitions. [2023-12-21 03:50:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 03:50:52,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:52,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:50:52,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:52,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 03:50:52,236 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:52,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash -833058966, now seen corresponding path program 2 times [2023-12-21 03:50:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:52,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866879995] [2023-12-21 03:50:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:52,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 03:50:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866879995] [2023-12-21 03:50:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866879995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895116582] [2023-12-21 03:50:52,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:50:52,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:52,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 03:50:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:50:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:52,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-21 03:50:52,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:52,703 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 19 treesize of output 11 [2023-12-21 03:50:52,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:52,709 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 19 treesize of output 11 [2023-12-21 03:50:52,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 3 [2023-12-21 03:50:52,718 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 30 treesize of output 18 [2023-12-21 03:50:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 03:50:52,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 03:50:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895116582] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:52,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-12-21 03:50:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191383456] [2023-12-21 03:50:52,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 03:50:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 03:50:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-21 03:50:52,813 INFO L87 Difference]: Start difference. First operand 317 states and 405 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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 03:50:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:52,984 INFO L93 Difference]: Finished difference Result 723 states and 933 transitions. [2023-12-21 03:50:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 03:50:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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 36 [2023-12-21 03:50:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:52,985 INFO L225 Difference]: With dead ends: 723 [2023-12-21 03:50:52,985 INFO L226 Difference]: Without dead ends: 436 [2023-12-21 03:50:52,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-12-21 03:50:52,986 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:52,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 150 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:50:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-21 03:50:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2023-12-21 03:50:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.2884615384615385) internal successors, (469), 364 states have internal predecessors, (469), 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 03:50:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 469 transitions. [2023-12-21 03:50:53,005 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 469 transitions. Word has length 36 [2023-12-21 03:50:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:53,006 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 469 transitions. [2023-12-21 03:50:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 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 03:50:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 469 transitions. [2023-12-21 03:50:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 03:50:53,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:53,006 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-21 03:50:53,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-21 03:50:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 03:50:53,212 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:53,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1381627865, now seen corresponding path program 5 times [2023-12-21 03:50:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882837662] [2023-12-21 03:50:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:53,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:50:54,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882837662] [2023-12-21 03:50:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882837662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533859093] [2023-12-21 03:50:54,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 03:50:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:54,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:54,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 03:50:54,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 03:50:54,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:54,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 114 conjunts are in the unsatisfiable core [2023-12-21 03:50:54,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:54,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:50:54,688 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 11 treesize of output 7 [2023-12-21 03:50:54,691 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 1 [2023-12-21 03:50:54,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:54,799 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 23 treesize of output 15 [2023-12-21 03:50:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:54,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2023-12-21 03:50:54,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 24 [2023-12-21 03:50:54,822 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-12-21 03:50:54,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2023-12-21 03:50:54,830 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 19 treesize of output 11 [2023-12-21 03:50:55,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:55,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 97 treesize of output 54 [2023-12-21 03:50:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:55,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-12-21 03:50:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:55,047 INFO L349 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2023-12-21 03:50:55,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2023-12-21 03:50:55,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-12-21 03:50:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:55,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2023-12-21 03:50:55,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:50:55,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:50:55,093 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 97 treesize of output 65 [2023-12-21 03:50:55,253 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:50:55,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2023-12-21 03:50:55,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 03:50:55,298 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 7 [2023-12-21 03:50:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:55,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:55,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:55,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2023-12-21 03:50:55,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:55,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2023-12-21 03:50:55,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:55,592 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2023-12-21 03:50:55,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:55,597 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-12-21 03:50:55,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:50:55,600 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 47 treesize of output 35 [2023-12-21 03:50:55,602 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 64 treesize of output 54 [2023-12-21 03:50:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:50:55,605 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 36 treesize of output 28 [2023-12-21 03:50:55,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:55,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 112 [2023-12-21 03:50:55,741 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 90 treesize of output 74 [2023-12-21 03:50:55,745 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 40 treesize of output 32 [2023-12-21 03:50:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 55 refuted. 1 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 03:50:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533859093] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:50:55,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:50:55,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2023-12-21 03:50:55,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283009679] [2023-12-21 03:50:55,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:50:55,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 03:50:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:50:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 03:50:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=929, Unknown=2, NotChecked=0, Total=1056 [2023-12-21 03:50:55,898 INFO L87 Difference]: Start difference. First operand 365 states and 469 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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 03:50:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:50:57,864 INFO L93 Difference]: Finished difference Result 521 states and 658 transitions. [2023-12-21 03:50:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-21 03:50:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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 38 [2023-12-21 03:50:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:50:57,866 INFO L225 Difference]: With dead ends: 521 [2023-12-21 03:50:57,866 INFO L226 Difference]: Without dead ends: 519 [2023-12-21 03:50:57,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=736, Invalid=3552, Unknown=2, NotChecked=0, Total=4290 [2023-12-21 03:50:57,869 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 309 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 03:50:57,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 380 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 03:50:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-12-21 03:50:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 414. [2023-12-21 03:50:57,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.2857142857142858) internal successors, (531), 413 states have internal predecessors, (531), 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 03:50:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 531 transitions. [2023-12-21 03:50:57,900 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 531 transitions. Word has length 38 [2023-12-21 03:50:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:50:57,901 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 531 transitions. [2023-12-21 03:50:57,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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 03:50:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 531 transitions. [2023-12-21 03:50:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 03:50:57,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:50:57,902 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-21 03:50:57,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 03:50:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 03:50:58,109 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:50:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:50:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1400216001, now seen corresponding path program 6 times [2023-12-21 03:50:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:50:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435292460] [2023-12-21 03:50:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:50:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:50:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:50:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:50:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435292460] [2023-12-21 03:50:59,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435292460] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:50:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945927357] [2023-12-21 03:50:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 03:50:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:50:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:50:59,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:50:59,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 03:50:59,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-21 03:50:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:50:59,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-21 03:50:59,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:50:59,313 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 11 treesize of output 7 [2023-12-21 03:50:59,316 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 1 [2023-12-21 03:50:59,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:50:59,354 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 23 treesize of output 15 [2023-12-21 03:50:59,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:50:59,362 INFO L349 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2023-12-21 03:50:59,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2023-12-21 03:50:59,367 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 19 treesize of output 11 [2023-12-21 03:50:59,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:50:59,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 96 treesize of output 57 [2023-12-21 03:50:59,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:50:59,614 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2023-12-21 03:50:59,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 49 [2023-12-21 03:50:59,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:50:59,643 INFO L349 Elim1Store]: treesize reduction 74, result has 56.2 percent of original size [2023-12-21 03:50:59,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 117 [2023-12-21 03:50:59,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:50:59,679 INFO L349 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2023-12-21 03:50:59,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 30 [2023-12-21 03:50:59,714 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 92 treesize of output 64 [2023-12-21 03:50:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:50:59,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:50:59,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:50:59,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 125 [2023-12-21 03:51:00,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:00,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 104 [2023-12-21 03:51:00,885 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2023-12-21 03:51:00,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 222 treesize of output 202 [2023-12-21 03:51:00,908 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2023-12-21 03:51:00,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 174 [2023-12-21 03:51:00,954 INFO L349 Elim1Store]: treesize reduction 72, result has 41.0 percent of original size [2023-12-21 03:51:00,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 267 [2023-12-21 03:51:00,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:00,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 208 [2023-12-21 03:51:01,056 INFO L349 Elim1Store]: treesize reduction 161, result has 35.1 percent of original size [2023-12-21 03:51:01,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 459 treesize of output 465 [2023-12-21 03:51:01,080 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 236 treesize of output 228 [2023-12-21 03:51:01,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:01,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 197 [2023-12-21 03:51:01,122 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 206 treesize of output 194 [2023-12-21 03:51:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:51:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945927357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:01,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2023-12-21 03:51:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593210586] [2023-12-21 03:51:01,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:01,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 03:51:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 03:51:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-12-21 03:51:01,851 INFO L87 Difference]: Start difference. First operand 414 states and 531 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 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 03:51:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:03,626 INFO L93 Difference]: Finished difference Result 947 states and 1217 transitions. [2023-12-21 03:51:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 03:51:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 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 41 [2023-12-21 03:51:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:03,627 INFO L225 Difference]: With dead ends: 947 [2023-12-21 03:51:03,627 INFO L226 Difference]: Without dead ends: 590 [2023-12-21 03:51:03,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=397, Invalid=2153, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 03:51:03,628 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 133 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:03,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 625 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 03:51:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-12-21 03:51:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 489. [2023-12-21 03:51:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2745901639344261) internal successors, (622), 488 states have internal predecessors, (622), 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 03:51:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 622 transitions. [2023-12-21 03:51:03,659 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 622 transitions. Word has length 41 [2023-12-21 03:51:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:03,659 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 622 transitions. [2023-12-21 03:51:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 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 03:51:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 622 transitions. [2023-12-21 03:51:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 03:51:03,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:03,659 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:03,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:03,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 03:51:03,865 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:03,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash -373657249, now seen corresponding path program 2 times [2023-12-21 03:51:03,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:03,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619711138] [2023-12-21 03:51:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:03,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:51:04,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:04,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619711138] [2023-12-21 03:51:04,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619711138] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:04,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33929471] [2023-12-21 03:51:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:51:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:04,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:04,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 03:51:04,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:51:04,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:04,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-21 03:51:04,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:04,467 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 11 treesize of output 7 [2023-12-21 03:51:04,470 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 1 [2023-12-21 03:51:04,536 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 8 treesize of output 1 [2023-12-21 03:51:04,599 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 30 treesize of output 18 [2023-12-21 03:51:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 03:51:04,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:04,751 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-12-21 03:51:04,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2023-12-21 03:51:04,777 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 8 treesize of output 4 [2023-12-21 03:51:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 03:51:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33929471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:04,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-12-21 03:51:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599444813] [2023-12-21 03:51:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 03:51:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 03:51:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-21 03:51:04,796 INFO L87 Difference]: Start difference. First operand 489 states and 622 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 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 03:51:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:06,207 INFO L93 Difference]: Finished difference Result 1630 states and 2175 transitions. [2023-12-21 03:51:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-21 03:51:06,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 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 41 [2023-12-21 03:51:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:06,210 INFO L225 Difference]: With dead ends: 1630 [2023-12-21 03:51:06,211 INFO L226 Difference]: Without dead ends: 1186 [2023-12-21 03:51:06,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=686, Invalid=3736, Unknown=0, NotChecked=0, Total=4422 [2023-12-21 03:51:06,213 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 247 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:06,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 504 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 03:51:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2023-12-21 03:51:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 876. [2023-12-21 03:51:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.3085714285714285) internal successors, (1145), 875 states have internal predecessors, (1145), 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 03:51:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1145 transitions. [2023-12-21 03:51:06,267 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1145 transitions. Word has length 41 [2023-12-21 03:51:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:06,267 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 1145 transitions. [2023-12-21 03:51:06,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 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 03:51:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1145 transitions. [2023-12-21 03:51:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-21 03:51:06,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:06,268 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:06,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:06,474 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:06,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 316955216, now seen corresponding path program 3 times [2023-12-21 03:51:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:06,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321955113] [2023-12-21 03:51:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:51:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321955113] [2023-12-21 03:51:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321955113] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709039772] [2023-12-21 03:51:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:51:07,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:07,190 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:07,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 03:51:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 03:51:07,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:07,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-21 03:51:07,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:07,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2023-12-21 03:51:07,416 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 11 treesize of output 7 [2023-12-21 03:51:07,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:07,422 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 1 [2023-12-21 03:51:07,557 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 19 treesize of output 11 [2023-12-21 03:51:07,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:07,567 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 23 treesize of output 15 [2023-12-21 03:51:07,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 24 [2023-12-21 03:51:07,578 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:51:07,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:51:07,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-21 03:51:07,709 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 50 treesize of output 30 [2023-12-21 03:51:07,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 03:51:07,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-21 03:51:07,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:51:07,738 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 27 treesize of output 15 [2023-12-21 03:51:07,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:51:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:07,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:07,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:07,911 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 25 treesize of output 23 [2023-12-21 03:51:07,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:07,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2023-12-21 03:51:07,916 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 12 treesize of output 8 [2023-12-21 03:51:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709039772] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:07,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:07,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 20 [2023-12-21 03:51:07,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290661529] [2023-12-21 03:51:07,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:07,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 03:51:07,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 03:51:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=358, Unknown=3, NotChecked=0, Total=420 [2023-12-21 03:51:07,922 INFO L87 Difference]: Start difference. First operand 876 states and 1145 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 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 03:51:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:08,322 INFO L93 Difference]: Finished difference Result 1715 states and 2254 transitions. [2023-12-21 03:51:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 03:51:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 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 41 [2023-12-21 03:51:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:08,324 INFO L225 Difference]: With dead ends: 1715 [2023-12-21 03:51:08,324 INFO L226 Difference]: Without dead ends: 896 [2023-12-21 03:51:08,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=643, Unknown=3, NotChecked=0, Total=756 [2023-12-21 03:51:08,326 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:08,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 175 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 03:51:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2023-12-21 03:51:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 891. [2023-12-21 03:51:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.3056179775280898) internal successors, (1162), 890 states have internal predecessors, (1162), 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 03:51:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1162 transitions. [2023-12-21 03:51:08,385 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1162 transitions. Word has length 41 [2023-12-21 03:51:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:08,385 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1162 transitions. [2023-12-21 03:51:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 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 03:51:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1162 transitions. [2023-12-21 03:51:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 03:51:08,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:08,385 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:08,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:08,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:08,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1343316239, now seen corresponding path program 1 times [2023-12-21 03:51:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:08,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114696807] [2023-12-21 03:51:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:51:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114696807] [2023-12-21 03:51:09,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114696807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22765936] [2023-12-21 03:51:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:09,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:09,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:09,176 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:09,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 03:51:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:09,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-21 03:51:09,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:09,425 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 1 [2023-12-21 03:51:09,427 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 11 treesize of output 7 [2023-12-21 03:51:09,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2023-12-21 03:51:09,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-12-21 03:51:09,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-12-21 03:51:09,646 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 19 treesize of output 11 [2023-12-21 03:51:09,649 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 7 [2023-12-21 03:51:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:09,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:09,847 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 21 treesize of output 19 [2023-12-21 03:51:09,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-21 03:51:09,852 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 11 treesize of output 7 [2023-12-21 03:51:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:09,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22765936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:09,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:09,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2023-12-21 03:51:09,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941247164] [2023-12-21 03:51:09,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:09,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 03:51:09,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 03:51:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=623, Unknown=4, NotChecked=0, Total=756 [2023-12-21 03:51:09,886 INFO L87 Difference]: Start difference. First operand 891 states and 1162 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 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 03:51:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:11,719 INFO L93 Difference]: Finished difference Result 2266 states and 2975 transitions. [2023-12-21 03:51:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 03:51:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 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 42 [2023-12-21 03:51:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:11,723 INFO L225 Difference]: With dead ends: 2266 [2023-12-21 03:51:11,723 INFO L226 Difference]: Without dead ends: 1447 [2023-12-21 03:51:11,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=2795, Unknown=4, NotChecked=0, Total=3422 [2023-12-21 03:51:11,725 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 264 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:11,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 580 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 03:51:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2023-12-21 03:51:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1330. [2023-12-21 03:51:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 1.3039879608728366) internal successors, (1733), 1329 states have internal predecessors, (1733), 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 03:51:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1733 transitions. [2023-12-21 03:51:11,814 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1733 transitions. Word has length 42 [2023-12-21 03:51:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:11,814 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 1733 transitions. [2023-12-21 03:51:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 27 states have internal predecessors, (115), 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 03:51:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1733 transitions. [2023-12-21 03:51:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 03:51:11,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:11,815 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:11,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:12,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:12,021 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2115995138, now seen corresponding path program 1 times [2023-12-21 03:51:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:12,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973345393] [2023-12-21 03:51:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:51:12,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:12,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973345393] [2023-12-21 03:51:12,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973345393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:12,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575930688] [2023-12-21 03:51:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:12,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:12,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:12,834 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:12,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 03:51:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:13,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 03:51:13,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:13,109 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 1 [2023-12-21 03:51:13,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2023-12-21 03:51:13,114 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 11 treesize of output 7 [2023-12-21 03:51:13,202 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 19 treesize of output 11 [2023-12-21 03:51:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 03:51:13,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 03:51:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575930688] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:13,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 27 [2023-12-21 03:51:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279907937] [2023-12-21 03:51:13,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 03:51:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 03:51:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-12-21 03:51:13,332 INFO L87 Difference]: Start difference. First operand 1330 states and 1733 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 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 03:51:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:15,153 INFO L93 Difference]: Finished difference Result 3136 states and 4117 transitions. [2023-12-21 03:51:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-21 03:51:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 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 43 [2023-12-21 03:51:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:15,159 INFO L225 Difference]: With dead ends: 3136 [2023-12-21 03:51:15,159 INFO L226 Difference]: Without dead ends: 1872 [2023-12-21 03:51:15,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=818, Invalid=4438, Unknown=0, NotChecked=0, Total=5256 [2023-12-21 03:51:15,169 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 253 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:15,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 510 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 03:51:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2023-12-21 03:51:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1738. [2023-12-21 03:51:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 1.3097294185377086) internal successors, (2275), 1737 states have internal predecessors, (2275), 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 03:51:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2275 transitions. [2023-12-21 03:51:15,298 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2275 transitions. Word has length 43 [2023-12-21 03:51:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:15,298 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2275 transitions. [2023-12-21 03:51:15,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 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 03:51:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2275 transitions. [2023-12-21 03:51:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 03:51:15,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:15,299 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:15,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:15,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-21 03:51:15,505 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:15,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:15,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1777727546, now seen corresponding path program 2 times [2023-12-21 03:51:15,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:15,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309252183] [2023-12-21 03:51:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:15,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 03:51:15,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309252183] [2023-12-21 03:51:15,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309252183] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975355011] [2023-12-21 03:51:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:51:15,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:15,696 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:15,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 03:51:15,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:51:15,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:15,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 03:51:15,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 03:51:15,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 03:51:15,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975355011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:15,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:15,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2023-12-21 03:51:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825335435] [2023-12-21 03:51:15,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 03:51:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 03:51:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-21 03:51:15,942 INFO L87 Difference]: Start difference. First operand 1738 states and 2275 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 03:51:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:16,266 INFO L93 Difference]: Finished difference Result 3459 states and 4554 transitions. [2023-12-21 03:51:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 03:51:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 45 [2023-12-21 03:51:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:16,271 INFO L225 Difference]: With dead ends: 3459 [2023-12-21 03:51:16,271 INFO L226 Difference]: Without dead ends: 1831 [2023-12-21 03:51:16,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-21 03:51:16,273 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:16,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 120 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:51:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2023-12-21 03:51:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1730. [2023-12-21 03:51:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 1.2862926547137072) internal successors, (2224), 1729 states have internal predecessors, (2224), 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 03:51:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2224 transitions. [2023-12-21 03:51:16,397 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2224 transitions. Word has length 45 [2023-12-21 03:51:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:16,397 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2224 transitions. [2023-12-21 03:51:16,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 03:51:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2224 transitions. [2023-12-21 03:51:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 03:51:16,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:16,398 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:16,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:16,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:16,605 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:16,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1767275433, now seen corresponding path program 2 times [2023-12-21 03:51:16,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:16,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676907317] [2023-12-21 03:51:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:16,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 03:51:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:17,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676907317] [2023-12-21 03:51:17,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676907317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391994245] [2023-12-21 03:51:17,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:51:17,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:17,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:17,021 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:17,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 03:51:17,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:51:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:17,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-21 03:51:17,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:17,283 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 11 treesize of output 7 [2023-12-21 03:51:17,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:17,290 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 1 [2023-12-21 03:51:17,338 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 19 treesize of output 11 [2023-12-21 03:51:17,341 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 23 treesize of output 15 [2023-12-21 03:51:17,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:51:17,349 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:51:17,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:51:17,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:17,651 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:51:17,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2023-12-21 03:51:17,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-12-21 03:51:17,782 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-12-21 03:51:17,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 40 [2023-12-21 03:51:17,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-12-21 03:51:17,867 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 38 treesize of output 22 [2023-12-21 03:51:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:51:17,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:18,581 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 234 treesize of output 206 [2023-12-21 03:51:18,588 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 275 treesize of output 247 [2023-12-21 03:51:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:51:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391994245] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:18,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:18,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 32 [2023-12-21 03:51:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483662883] [2023-12-21 03:51:18,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:18,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-21 03:51:18,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-21 03:51:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2023-12-21 03:51:18,652 INFO L87 Difference]: Start difference. First operand 1730 states and 2224 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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 03:51:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:28,216 INFO L93 Difference]: Finished difference Result 6479 states and 8434 transitions. [2023-12-21 03:51:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-12-21 03:51:28,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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 45 [2023-12-21 03:51:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:28,228 INFO L225 Difference]: With dead ends: 6479 [2023-12-21 03:51:28,228 INFO L226 Difference]: Without dead ends: 4849 [2023-12-21 03:51:28,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9910 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3633, Invalid=23099, Unknown=0, NotChecked=0, Total=26732 [2023-12-21 03:51:28,235 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 736 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:28,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 800 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-21 03:51:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2023-12-21 03:51:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 3311. [2023-12-21 03:51:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 3310 states have (on average 1.3033232628398792) internal successors, (4314), 3310 states have internal predecessors, (4314), 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 03:51:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 4314 transitions. [2023-12-21 03:51:28,557 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 4314 transitions. Word has length 45 [2023-12-21 03:51:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:28,558 INFO L495 AbstractCegarLoop]: Abstraction has 3311 states and 4314 transitions. [2023-12-21 03:51:28,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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 03:51:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 4314 transitions. [2023-12-21 03:51:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-21 03:51:28,558 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:28,558 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:28,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-21 03:51:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:28,765 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:28,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -656470216, now seen corresponding path program 3 times [2023-12-21 03:51:28,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:28,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839543106] [2023-12-21 03:51:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:28,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 44 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:51:29,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:29,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839543106] [2023-12-21 03:51:29,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839543106] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:29,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990341682] [2023-12-21 03:51:29,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:51:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:29,290 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:29,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 03:51:29,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 03:51:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:29,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-21 03:51:29,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:29,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:29,661 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 19 treesize of output 11 [2023-12-21 03:51:29,667 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 19 treesize of output 11 [2023-12-21 03:51:29,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:29,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 3 [2023-12-21 03:51:29,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:29,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 64 treesize of output 33 [2023-12-21 03:51:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:29,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-12-21 03:51:29,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:29,754 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:51:29,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:51:29,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2023-12-21 03:51:29,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:51:29,785 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 65 treesize of output 41 [2023-12-21 03:51:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 44 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:51:29,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:29,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:29,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2023-12-21 03:51:29,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:29,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-12-21 03:51:29,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-21 03:51:29,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-21 03:51:30,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:30,115 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2023-12-21 03:51:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:30,117 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 24 treesize of output 12 [2023-12-21 03:51:30,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:30,122 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-21 03:51:30,123 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:30,124 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 20 treesize of output 12 [2023-12-21 03:51:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 44 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 03:51:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990341682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:30,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-21 03:51:30,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672080157] [2023-12-21 03:51:30,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 03:51:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 03:51:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-21 03:51:30,188 INFO L87 Difference]: Start difference. First operand 3311 states and 4314 transitions. Second operand has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 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 03:51:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:30,861 INFO L93 Difference]: Finished difference Result 6790 states and 8851 transitions. [2023-12-21 03:51:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 03:51:30,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 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 49 [2023-12-21 03:51:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:30,870 INFO L225 Difference]: With dead ends: 6790 [2023-12-21 03:51:30,870 INFO L226 Difference]: Without dead ends: 3566 [2023-12-21 03:51:30,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-12-21 03:51:30,873 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:30,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 244 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 03:51:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2023-12-21 03:51:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3380. [2023-12-21 03:51:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 1.3003847292098254) internal successors, (4394), 3379 states have internal predecessors, (4394), 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 03:51:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4394 transitions. [2023-12-21 03:51:31,186 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4394 transitions. Word has length 49 [2023-12-21 03:51:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:31,186 INFO L495 AbstractCegarLoop]: Abstraction has 3380 states and 4394 transitions. [2023-12-21 03:51:31,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 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 03:51:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4394 transitions. [2023-12-21 03:51:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 03:51:31,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:31,187 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:31,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:31,392 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:31,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash 368579676, now seen corresponding path program 4 times [2023-12-21 03:51:31,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:31,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327222389] [2023-12-21 03:51:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-21 03:51:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:32,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327222389] [2023-12-21 03:51:32,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327222389] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:32,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576030814] [2023-12-21 03:51:32,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:51:32,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:32,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 03:51:32,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:51:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:32,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-21 03:51:32,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:32,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 108 treesize of output 27 [2023-12-21 03:51:32,650 INFO L349 Elim1Store]: treesize reduction 40, result has 57.4 percent of original size [2023-12-21 03:51:32,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 72 [2023-12-21 03:51:32,674 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 25 treesize of output 17 [2023-12-21 03:51:32,676 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 21 treesize of output 13 [2023-12-21 03:51:32,692 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 19 treesize of output 7 [2023-12-21 03:51:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 52 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 03:51:32,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:32,941 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-12-21 03:51:32,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-12-21 03:51:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 03:51:32,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576030814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:32,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:32,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2023-12-21 03:51:32,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534596979] [2023-12-21 03:51:32,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 03:51:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 03:51:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-12-21 03:51:32,946 INFO L87 Difference]: Start difference. First operand 3380 states and 4394 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 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 03:51:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:34,252 INFO L93 Difference]: Finished difference Result 7811 states and 10214 transitions. [2023-12-21 03:51:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-21 03:51:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 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 54 [2023-12-21 03:51:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:34,263 INFO L225 Difference]: With dead ends: 7811 [2023-12-21 03:51:34,263 INFO L226 Difference]: Without dead ends: 4534 [2023-12-21 03:51:34,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=631, Invalid=2791, Unknown=0, NotChecked=0, Total=3422 [2023-12-21 03:51:34,266 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 186 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:34,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 277 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 03:51:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2023-12-21 03:51:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3886. [2023-12-21 03:51:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.284169884169884) internal successors, (4989), 3885 states have internal predecessors, (4989), 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 03:51:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 4989 transitions. [2023-12-21 03:51:34,679 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 4989 transitions. Word has length 54 [2023-12-21 03:51:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:34,679 INFO L495 AbstractCegarLoop]: Abstraction has 3886 states and 4989 transitions. [2023-12-21 03:51:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 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 03:51:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 4989 transitions. [2023-12-21 03:51:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 03:51:34,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:34,680 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:51:34,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 03:51:34,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:34,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1870335510, now seen corresponding path program 5 times [2023-12-21 03:51:34,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193275982] [2023-12-21 03:51:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 58 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 03:51:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193275982] [2023-12-21 03:51:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193275982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197332037] [2023-12-21 03:51:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 03:51:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:35,458 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:35,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 03:51:35,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 03:51:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:35,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-21 03:51:35,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:35,879 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 11 treesize of output 7 [2023-12-21 03:51:35,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:35,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:35,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 03:51:35,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 16 [2023-12-21 03:51:36,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:36,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 27 [2023-12-21 03:51:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:36,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-12-21 03:51:36,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:36,015 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:51:36,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:51:36,018 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 19 treesize of output 11 [2023-12-21 03:51:36,026 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 51 treesize of output 31 [2023-12-21 03:51:36,054 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 7 treesize of output 3 [2023-12-21 03:51:36,089 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-21 03:51:36,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-21 03:51:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 58 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 03:51:36,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:36,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:36,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-21 03:51:36,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:36,249 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2023-12-21 03:51:36,251 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:36,252 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 25 treesize of output 13 [2023-12-21 03:51:36,283 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 8 treesize of output 4 [2023-12-21 03:51:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 57 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 03:51:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197332037] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:36,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-12-21 03:51:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088290117] [2023-12-21 03:51:36,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:36,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 03:51:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 03:51:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2023-12-21 03:51:36,285 INFO L87 Difference]: Start difference. First operand 3886 states and 4989 transitions. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 states have internal predecessors, (87), 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 03:51:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:37,100 INFO L93 Difference]: Finished difference Result 7576 states and 9752 transitions. [2023-12-21 03:51:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 03:51:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 states have internal predecessors, (87), 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 57 [2023-12-21 03:51:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:37,122 INFO L225 Difference]: With dead ends: 7576 [2023-12-21 03:51:37,123 INFO L226 Difference]: Without dead ends: 3873 [2023-12-21 03:51:37,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=542, Unknown=1, NotChecked=0, Total=702 [2023-12-21 03:51:37,126 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 138 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 332 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 03:51:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2023-12-21 03:51:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3787. [2023-12-21 03:51:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 1.2823560486001055) internal successors, (4855), 3786 states have internal predecessors, (4855), 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 03:51:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 4855 transitions. [2023-12-21 03:51:37,474 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 4855 transitions. Word has length 57 [2023-12-21 03:51:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 4855 transitions. [2023-12-21 03:51:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 states have internal predecessors, (87), 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 03:51:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 4855 transitions. [2023-12-21 03:51:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-21 03:51:37,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:37,476 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2023-12-21 03:51:37,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 03:51:37,684 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:37,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1442008675, now seen corresponding path program 7 times [2023-12-21 03:51:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100877501] [2023-12-21 03:51:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:51:39,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100877501] [2023-12-21 03:51:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100877501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771258575] [2023-12-21 03:51:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 03:51:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:39,774 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:39,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 03:51:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:40,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 126 conjunts are in the unsatisfiable core [2023-12-21 03:51:40,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:40,043 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 11 treesize of output 7 [2023-12-21 03:51:40,046 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 1 [2023-12-21 03:51:40,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:40,088 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 23 treesize of output 15 [2023-12-21 03:51:40,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:51:40,098 INFO L349 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2023-12-21 03:51:40,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2023-12-21 03:51:40,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:40,105 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 19 treesize of output 11 [2023-12-21 03:51:40,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 35 [2023-12-21 03:51:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-12-21 03:51:40,200 INFO L349 Elim1Store]: treesize reduction 156, result has 24.6 percent of original size [2023-12-21 03:51:40,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 69 [2023-12-21 03:51:40,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2023-12-21 03:51:40,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:51:40,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:40,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:40,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:40,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 137 treesize of output 86 [2023-12-21 03:51:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,651 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2023-12-21 03:51:40,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 66 [2023-12-21 03:51:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2023-12-21 03:51:40,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:51:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:40,699 INFO L349 Elim1Store]: treesize reduction 41, result has 36.9 percent of original size [2023-12-21 03:51:40,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 37 [2023-12-21 03:51:40,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2023-12-21 03:51:40,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:40,760 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 128 treesize of output 92 [2023-12-21 03:51:41,043 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-21 03:51:41,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 51 [2023-12-21 03:51:41,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-21 03:51:41,074 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 7 [2023-12-21 03:51:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 78 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:41,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:41,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:41,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 130 [2023-12-21 03:51:41,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:41,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 109 [2023-12-21 03:51:41,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:41,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 249 [2023-12-21 03:51:41,490 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 97 treesize of output 50 [2023-12-21 03:51:42,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:42,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 260 [2023-12-21 03:51:42,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:42,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 218 [2023-12-21 03:51:44,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:44,455 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2023-12-21 03:51:44,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:44,460 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 61 [2023-12-21 03:51:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:44,464 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 49 treesize of output 43 [2023-12-21 03:51:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:44,468 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 185 treesize of output 167 [2023-12-21 03:51:44,470 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 89 treesize of output 75 [2023-12-21 03:51:44,472 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 75 treesize of output 61 [2023-12-21 03:51:44,485 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-21 03:51:44,486 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 1 [2023-12-21 03:51:44,491 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-21 03:51:44,491 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 1 [2023-12-21 03:51:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 111 refuted. 63 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771258575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:51:44,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:51:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 48 [2023-12-21 03:51:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992453679] [2023-12-21 03:51:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:51:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-21 03:51:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:51:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-21 03:51:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2021, Unknown=20, NotChecked=0, Total=2256 [2023-12-21 03:51:44,724 INFO L87 Difference]: Start difference. First operand 3787 states and 4855 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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 03:51:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:51:49,505 INFO L93 Difference]: Finished difference Result 3985 states and 5089 transitions. [2023-12-21 03:51:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-21 03:51:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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 57 [2023-12-21 03:51:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:51:49,511 INFO L225 Difference]: With dead ends: 3985 [2023-12-21 03:51:49,512 INFO L226 Difference]: Without dead ends: 3983 [2023-12-21 03:51:49,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=891, Invalid=6229, Unknown=20, NotChecked=0, Total=7140 [2023-12-21 03:51:49,514 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 238 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:51:49,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 938 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-21 03:51:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2023-12-21 03:51:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3855. [2023-12-21 03:51:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3854 states have (on average 1.2812662169174884) internal successors, (4938), 3854 states have internal predecessors, (4938), 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 03:51:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 4938 transitions. [2023-12-21 03:51:49,884 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 4938 transitions. Word has length 57 [2023-12-21 03:51:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:51:49,884 INFO L495 AbstractCegarLoop]: Abstraction has 3855 states and 4938 transitions. [2023-12-21 03:51:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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 03:51:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 4938 transitions. [2023-12-21 03:51:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 03:51:49,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:51:49,885 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2023-12-21 03:51:49,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 03:51:50,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 03:51:50,091 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:51:50,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:51:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 621454979, now seen corresponding path program 8 times [2023-12-21 03:51:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:51:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079937504] [2023-12-21 03:51:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:51:50,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:51:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:51:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:51:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:51:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079937504] [2023-12-21 03:51:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079937504] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:51:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49883381] [2023-12-21 03:51:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:51:51,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:51:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:51:51,750 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:51:51,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 03:51:52,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:51:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:51:52,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-21 03:51:52,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:51:52,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:51:52,063 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 1 [2023-12-21 03:51:52,065 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 11 treesize of output 7 [2023-12-21 03:51:52,104 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 19 treesize of output 11 [2023-12-21 03:51:52,108 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 23 treesize of output 15 [2023-12-21 03:51:52,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:51:52,118 INFO L349 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2023-12-21 03:51:52,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2023-12-21 03:51:52,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:52,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:52,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 35 [2023-12-21 03:51:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2023-12-21 03:51:52,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:52,244 INFO L349 Elim1Store]: treesize reduction 34, result has 46.0 percent of original size [2023-12-21 03:51:52,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 47 [2023-12-21 03:51:52,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:51:52,273 INFO L349 Elim1Store]: treesize reduction 156, result has 24.6 percent of original size [2023-12-21 03:51:52,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 69 [2023-12-21 03:51:52,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 156 treesize of output 101 [2023-12-21 03:51:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,769 INFO L349 Elim1Store]: treesize reduction 74, result has 12.9 percent of original size [2023-12-21 03:51:52,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 81 [2023-12-21 03:51:52,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,784 INFO L349 Elim1Store]: treesize reduction 41, result has 36.9 percent of original size [2023-12-21 03:51:52,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 37 [2023-12-21 03:51:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:52,794 INFO L349 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2023-12-21 03:51:52,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 79 [2023-12-21 03:51:52,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-21 03:51:52,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:51:52,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:51:52,855 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 151 treesize of output 111 [2023-12-21 03:51:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 88 proven. 130 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:51:53,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:51:53,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:53,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 257 [2023-12-21 03:51:53,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:53,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 208 [2023-12-21 03:51:54,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:54,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 438 treesize of output 378 [2023-12-21 03:51:54,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:54,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 308 [2023-12-21 03:51:59,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,730 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 302 [2023-12-21 03:51:59,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,736 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 190 [2023-12-21 03:51:59,738 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,740 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:59,748 INFO L349 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2023-12-21 03:51:59,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 193 treesize of output 136 [2023-12-21 03:51:59,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 61 [2023-12-21 03:51:59,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,763 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,765 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,779 INFO L349 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2023-12-21 03:51:59,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 613 treesize of output 495 [2023-12-21 03:51:59,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 274 [2023-12-21 03:51:59,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 200 [2023-12-21 03:51:59,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,884 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 286 [2023-12-21 03:51:59,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:51:59,890 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 190 [2023-12-21 03:51:59,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,894 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,894 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:59,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:51:59,911 INFO L349 Elim1Store]: treesize reduction 104, result has 3.7 percent of original size [2023-12-21 03:51:59,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 485 treesize of output 336 [2023-12-21 03:51:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,920 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,926 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-21 03:51:59,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 988 treesize of output 874 [2023-12-21 03:51:59,945 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-12-21 03:51:59,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 216 [2023-12-21 03:51:59,954 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 232 [2023-12-21 03:51:59,962 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 270 treesize of output 230 [2023-12-21 03:51:59,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:51:59,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 130 [2023-12-21 03:52:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 22 proven. 170 refuted. 26 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:52:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49883381] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:00,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:00,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-12-21 03:52:00,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327728749] [2023-12-21 03:52:00,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:00,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-21 03:52:00,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-21 03:52:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1584, Unknown=3, NotChecked=0, Total=1806 [2023-12-21 03:52:00,577 INFO L87 Difference]: Start difference. First operand 3855 states and 4938 transitions. Second operand has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 03:52:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:05,090 INFO L93 Difference]: Finished difference Result 7613 states and 9772 transitions. [2023-12-21 03:52:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-21 03:52:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 60 [2023-12-21 03:52:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:05,097 INFO L225 Difference]: With dead ends: 7613 [2023-12-21 03:52:05,097 INFO L226 Difference]: Without dead ends: 4088 [2023-12-21 03:52:05,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=707, Invalid=4546, Unknown=3, NotChecked=0, Total=5256 [2023-12-21 03:52:05,101 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 247 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:05,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1023 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-21 03:52:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2023-12-21 03:52:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3945. [2023-12-21 03:52:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 1.2796653144016228) internal successors, (5047), 3944 states have internal predecessors, (5047), 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 03:52:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 5047 transitions. [2023-12-21 03:52:05,471 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 5047 transitions. Word has length 60 [2023-12-21 03:52:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:05,472 INFO L495 AbstractCegarLoop]: Abstraction has 3945 states and 5047 transitions. [2023-12-21 03:52:05,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 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 03:52:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 5047 transitions. [2023-12-21 03:52:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 03:52:05,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:05,472 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:52:05,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 03:52:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:05,678 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:05,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash -486282030, now seen corresponding path program 6 times [2023-12-21 03:52:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:05,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448536884] [2023-12-21 03:52:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:05,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:52:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448536884] [2023-12-21 03:52:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448536884] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565952375] [2023-12-21 03:52:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 03:52:06,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:06,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:06,528 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:06,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 03:52:07,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-21 03:52:07,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:52:07,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 102 conjunts are in the unsatisfiable core [2023-12-21 03:52:07,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:07,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:52:07,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 03:52:07,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 16 [2023-12-21 03:52:07,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:52:07,125 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 11 treesize of output 7 [2023-12-21 03:52:07,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:52:07,230 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 19 treesize of output 11 [2023-12-21 03:52:07,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 27 [2023-12-21 03:52:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:07,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-12-21 03:52:07,243 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:52:07,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:52:07,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:52:07,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-21 03:52:07,515 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:52:07,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2023-12-21 03:52:07,532 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 11 treesize of output 3 [2023-12-21 03:52:07,571 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:52:07,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 37 [2023-12-21 03:52:07,583 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:52:07,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2023-12-21 03:52:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-21 03:52:07,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:07,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:07,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 38 [2023-12-21 03:52:07,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:07,838 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2023-12-21 03:52:07,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:52:07,840 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 25 treesize of output 13 [2023-12-21 03:52:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 51 proven. 71 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 03:52:07,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565952375] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:07,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:07,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2023-12-21 03:52:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313908721] [2023-12-21 03:52:07,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:07,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 03:52:07,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 03:52:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-12-21 03:52:07,855 INFO L87 Difference]: Start difference. First operand 3945 states and 5047 transitions. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 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 03:52:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:09,246 INFO L93 Difference]: Finished difference Result 8129 states and 10419 transitions. [2023-12-21 03:52:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 03:52:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 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 60 [2023-12-21 03:52:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:09,254 INFO L225 Difference]: With dead ends: 8129 [2023-12-21 03:52:09,254 INFO L226 Difference]: Without dead ends: 4344 [2023-12-21 03:52:09,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 03:52:09,258 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:09,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 352 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 03:52:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2023-12-21 03:52:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 4005. [2023-12-21 03:52:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 4004 states have (on average 1.278971028971029) internal successors, (5121), 4004 states have internal predecessors, (5121), 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 03:52:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 5121 transitions. [2023-12-21 03:52:09,655 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 5121 transitions. Word has length 60 [2023-12-21 03:52:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:09,655 INFO L495 AbstractCegarLoop]: Abstraction has 4005 states and 5121 transitions. [2023-12-21 03:52:09,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 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 03:52:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 5121 transitions. [2023-12-21 03:52:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 03:52:09,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:09,656 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:52:09,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 03:52:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:09,877 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:09,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2146915324, now seen corresponding path program 3 times [2023-12-21 03:52:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:09,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649766738] [2023-12-21 03:52:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 96 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 03:52:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649766738] [2023-12-21 03:52:10,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649766738] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749243448] [2023-12-21 03:52:10,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:52:10,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:10,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:10,667 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:10,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 03:52:11,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 03:52:11,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:52:11,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-21 03:52:11,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:11,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:52:11,258 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 1 [2023-12-21 03:52:11,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2023-12-21 03:52:11,354 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 11 treesize of output 7 [2023-12-21 03:52:11,361 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 23 treesize of output 15 [2023-12-21 03:52:11,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:52:11,371 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:52:11,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:52:11,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-12-21 03:52:11,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-21 03:52:11,601 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 28 treesize of output 12 [2023-12-21 03:52:11,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:52:11,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-21 03:52:11,707 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 19 treesize of output 11 [2023-12-21 03:52:11,710 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 7 [2023-12-21 03:52:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 24 proven. 84 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 03:52:11,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:11,799 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3584 (Array Int Int))) (< 0 (select (select (store |c_#memory_int#2| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_3584) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4)))) is different from false [2023-12-21 03:52:12,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:12,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2023-12-21 03:52:12,608 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 39 treesize of output 31 [2023-12-21 03:52:12,611 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 13 treesize of output 11 [2023-12-21 03:52:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 97 refuted. 0 times theorem prover too weak. 18 trivial. 7 not checked. [2023-12-21 03:52:12,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749243448] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:12,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2023-12-21 03:52:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478274975] [2023-12-21 03:52:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 03:52:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 03:52:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=891, Unknown=17, NotChecked=62, Total=1122 [2023-12-21 03:52:12,756 INFO L87 Difference]: Start difference. First operand 4005 states and 5121 transitions. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 33 states have internal predecessors, (155), 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 03:52:17,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-21 03:52:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:19,781 INFO L93 Difference]: Finished difference Result 8408 states and 10805 transitions. [2023-12-21 03:52:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-21 03:52:19,781 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 33 states have internal predecessors, (155), 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 61 [2023-12-21 03:52:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:19,788 INFO L225 Difference]: With dead ends: 8408 [2023-12-21 03:52:19,788 INFO L226 Difference]: Without dead ends: 4896 [2023-12-21 03:52:19,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=760, Invalid=3374, Unknown=30, NotChecked=126, Total=4290 [2023-12-21 03:52:19,792 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 217 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 17 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:19,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 749 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1250 Invalid, 43 Unknown, 221 Unchecked, 5.6s Time] [2023-12-21 03:52:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2023-12-21 03:52:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4335. [2023-12-21 03:52:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 1.2803414859252422) internal successors, (5549), 4334 states have internal predecessors, (5549), 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 03:52:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 5549 transitions. [2023-12-21 03:52:20,224 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 5549 transitions. Word has length 61 [2023-12-21 03:52:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:20,224 INFO L495 AbstractCegarLoop]: Abstraction has 4335 states and 5549 transitions. [2023-12-21 03:52:20,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 33 states have internal predecessors, (155), 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 03:52:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 5549 transitions. [2023-12-21 03:52:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 03:52:20,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:20,225 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:52:20,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 03:52:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-21 03:52:20,444 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:20,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1015260012, now seen corresponding path program 4 times [2023-12-21 03:52:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699016640] [2023-12-21 03:52:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 03:52:21,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:21,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699016640] [2023-12-21 03:52:21,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699016640] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:21,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059779737] [2023-12-21 03:52:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:52:21,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:21,149 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:21,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 03:52:21,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:52:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:52:21,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-21 03:52:21,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:21,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:52:21,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 42 [2023-12-21 03:52:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:21,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-12-21 03:52:21,676 INFO L349 Elim1Store]: treesize reduction 40, result has 57.4 percent of original size [2023-12-21 03:52:21,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 72 [2023-12-21 03:52:21,703 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 25 treesize of output 17 [2023-12-21 03:52:21,705 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 21 treesize of output 13 [2023-12-21 03:52:21,723 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 19 treesize of output 7 [2023-12-21 03:52:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 63 proven. 22 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 03:52:21,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:22,226 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-12-21 03:52:22,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2023-12-21 03:52:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 65 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-21 03:52:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059779737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:22,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 28 [2023-12-21 03:52:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079335937] [2023-12-21 03:52:22,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:22,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 03:52:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 03:52:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=609, Unknown=24, NotChecked=0, Total=756 [2023-12-21 03:52:22,233 INFO L87 Difference]: Start difference. First operand 4335 states and 5549 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 03:52:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:27,462 INFO L93 Difference]: Finished difference Result 5450 states and 7011 transitions. [2023-12-21 03:52:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-21 03:52:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 61 [2023-12-21 03:52:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:27,468 INFO L225 Difference]: With dead ends: 5450 [2023-12-21 03:52:27,468 INFO L226 Difference]: Without dead ends: 5448 [2023-12-21 03:52:27,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1049, Invalid=5733, Unknown=24, NotChecked=0, Total=6806 [2023-12-21 03:52:27,471 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 173 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:27,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 461 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1039 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-12-21 03:52:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2023-12-21 03:52:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4305. [2023-12-21 03:52:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 1.279507434944238) internal successors, (5507), 4304 states have internal predecessors, (5507), 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 03:52:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 5507 transitions. [2023-12-21 03:52:27,939 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 5507 transitions. Word has length 61 [2023-12-21 03:52:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:27,939 INFO L495 AbstractCegarLoop]: Abstraction has 4305 states and 5507 transitions. [2023-12-21 03:52:27,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 03:52:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 5507 transitions. [2023-12-21 03:52:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-21 03:52:27,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:27,940 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:52:27,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 03:52:28,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-21 03:52:28,146 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:28,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:28,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1515928435, now seen corresponding path program 5 times [2023-12-21 03:52:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:28,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678324134] [2023-12-21 03:52:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 26 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 03:52:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678324134] [2023-12-21 03:52:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678324134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402505173] [2023-12-21 03:52:29,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 03:52:29,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:29,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:29,127 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:29,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 03:52:30,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-21 03:52:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:52:30,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-21 03:52:30,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:30,666 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 1 [2023-12-21 03:52:30,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2023-12-21 03:52:30,673 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 11 treesize of output 7 [2023-12-21 03:52:30,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:52:30,807 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 23 treesize of output 15 [2023-12-21 03:52:30,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 24 [2023-12-21 03:52:30,821 INFO L349 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2023-12-21 03:52:30,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2023-12-21 03:52:30,834 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-21 03:52:30,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-12-21 03:52:30,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:52:30,843 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 19 treesize of output 11 [2023-12-21 03:52:31,048 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 45 treesize of output 29 [2023-12-21 03:52:31,096 INFO L349 Elim1Store]: treesize reduction 32, result has 38.5 percent of original size [2023-12-21 03:52:31,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2023-12-21 03:52:31,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-21 03:52:31,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 03:52:31,136 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 27 treesize of output 15 [2023-12-21 03:52:31,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:52:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 26 proven. 87 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 03:52:31,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:31,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 03:52:31,399 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 26 treesize of output 24 [2023-12-21 03:52:31,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:31,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2023-12-21 03:52:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 26 proven. 80 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 03:52:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402505173] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:31,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-12-21 03:52:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550182284] [2023-12-21 03:52:31,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:31,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 03:52:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 03:52:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-12-21 03:52:31,450 INFO L87 Difference]: Start difference. First operand 4305 states and 5507 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 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 03:52:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:33,553 INFO L93 Difference]: Finished difference Result 8667 states and 11098 transitions. [2023-12-21 03:52:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 03:52:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 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 62 [2023-12-21 03:52:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:33,557 INFO L225 Difference]: With dead ends: 8667 [2023-12-21 03:52:33,557 INFO L226 Difference]: Without dead ends: 4533 [2023-12-21 03:52:33,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 03:52:33,560 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 130 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:33,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 513 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 03:52:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4533 states. [2023-12-21 03:52:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4533 to 4478. [2023-12-21 03:52:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 1.27652445834264) internal successors, (5715), 4477 states have internal predecessors, (5715), 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 03:52:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 5715 transitions. [2023-12-21 03:52:34,024 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 5715 transitions. Word has length 62 [2023-12-21 03:52:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:34,024 INFO L495 AbstractCegarLoop]: Abstraction has 4478 states and 5715 transitions. [2023-12-21 03:52:34,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 27 states have internal predecessors, (142), 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 03:52:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 5715 transitions. [2023-12-21 03:52:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-21 03:52:34,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:34,025 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-21 03:52:34,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 03:52:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:34,233 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:34,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1535755199, now seen corresponding path program 1 times [2023-12-21 03:52:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:34,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242924618] [2023-12-21 03:52:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 03:52:34,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:34,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242924618] [2023-12-21 03:52:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242924618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:34,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755952368] [2023-12-21 03:52:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:34,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:34,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 03:52:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:35,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-21 03:52:35,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:35,057 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 11 treesize of output 7 [2023-12-21 03:52:35,061 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 1 [2023-12-21 03:52:35,271 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 30 treesize of output 18 [2023-12-21 03:52:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 03:52:35,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:35,400 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-12-21 03:52:35,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2023-12-21 03:52:35,432 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-21 03:52:35,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2023-12-21 03:52:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-21 03:52:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755952368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:52:35,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:52:35,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 19 [2023-12-21 03:52:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068142044] [2023-12-21 03:52:35,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:52:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 03:52:35,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:52:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 03:52:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-21 03:52:35,472 INFO L87 Difference]: Start difference. First operand 4478 states and 5715 transitions. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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 03:52:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:52:36,859 INFO L93 Difference]: Finished difference Result 8412 states and 10805 transitions. [2023-12-21 03:52:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 03:52:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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 62 [2023-12-21 03:52:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:52:36,864 INFO L225 Difference]: With dead ends: 8412 [2023-12-21 03:52:36,864 INFO L226 Difference]: Without dead ends: 4518 [2023-12-21 03:52:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 03:52:36,867 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 03:52:36,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 293 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 03:52:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2023-12-21 03:52:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3989. [2023-12-21 03:52:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3988 states have (on average 1.2780842527582748) internal successors, (5097), 3988 states have internal predecessors, (5097), 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 03:52:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 5097 transitions. [2023-12-21 03:52:37,329 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 5097 transitions. Word has length 62 [2023-12-21 03:52:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:52:37,329 INFO L495 AbstractCegarLoop]: Abstraction has 3989 states and 5097 transitions. [2023-12-21 03:52:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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 03:52:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 5097 transitions. [2023-12-21 03:52:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-21 03:52:37,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:52:37,330 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:52:37,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-21 03:52:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:37,536 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:52:37,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:52:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1243243299, now seen corresponding path program 7 times [2023-12-21 03:52:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:52:37,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153227027] [2023-12-21 03:52:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:52:37,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:52:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 44 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 03:52:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:52:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153227027] [2023-12-21 03:52:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153227027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:52:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681642753] [2023-12-21 03:52:39,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 03:52:39,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:52:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:52:39,354 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:52:39,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 03:52:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:52:39,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 145 conjunts are in the unsatisfiable core [2023-12-21 03:52:39,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:52:39,733 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 1 [2023-12-21 03:52:39,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-12-21 03:52:39,741 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 11 treesize of output 7 [2023-12-21 03:52:39,838 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 23 treesize of output 15 [2023-12-21 03:52:39,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 17 [2023-12-21 03:52:39,852 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2023-12-21 03:52:39,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2023-12-21 03:52:39,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2023-12-21 03:52:39,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:52:40,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 43 [2023-12-21 03:52:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:40,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-12-21 03:52:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:40,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-21 03:52:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:40,029 INFO L349 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2023-12-21 03:52:40,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2023-12-21 03:52:40,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-12-21 03:52:40,037 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 19 treesize of output 11 [2023-12-21 03:52:40,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-12-21 03:52:40,340 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:52:40,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 41 [2023-12-21 03:52:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-21 03:52:40,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-12-21 03:52:40,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-21 03:52:40,437 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-21 03:52:40,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-12-21 03:52:40,447 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-21 03:52:40,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 44 [2023-12-21 03:52:40,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-21 03:52:40,576 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-12-21 03:52:40,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 85 [2023-12-21 03:52:40,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 15 [2023-12-21 03:52:40,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2023-12-21 03:52:40,669 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 78 treesize of output 50 [2023-12-21 03:52:40,736 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:52:40,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 26 [2023-12-21 03:52:40,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:52:40,768 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 7 [2023-12-21 03:52:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-21 03:52:40,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:52:40,905 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4340 (Array Int Int)) (v_ArrVal_4338 (Array Int Int)) (v_ArrVal_4339 (Array Int Int))) (< 0 (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8))) (select (select (store |c_#memory_int#2| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_4338) (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_4340) .cse0) .cse1)) (+ (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_4339) .cse0) .cse1) 4))))) is different from false [2023-12-21 03:52:40,916 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4340 (Array Int Int)) (v_ArrVal_4338 (Array Int Int)) (v_ArrVal_4339 (Array Int Int))) (< 0 (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8))) (select (select (store |c_#memory_int#2| .cse0 v_ArrVal_4338) (select (select (store |c_#memory_$Pointer$#2.base| .cse0 v_ArrVal_4340) .cse1) .cse2)) (+ (select (select (store |c_#memory_$Pointer$#2.offset| .cse0 v_ArrVal_4339) .cse1) .cse2) 4))))) is different from false [2023-12-21 03:52:41,265 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4340 (Array Int Int)) (v_ArrVal_4331 (Array Int Int)) (v_ArrVal_4328 Int) (v_ArrVal_4336 Int) (v_ArrVal_4334 (Array Int Int)) (v_ArrVal_4337 Int) (v_ArrVal_4338 (Array Int Int)) (v_ArrVal_4339 (Array Int Int)) (v_ArrVal_4330 Int)) (let ((.cse12 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse9 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse13 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (let ((.cse11 (select .cse9 .cse13)) (.cse0 (store |c_#memory_int#2| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_4331)) (.cse1 (select .cse12 .cse13))) (let ((.cse2 (select .cse0 .cse1)) (.cse3 (+ .cse11 4))) (or (< 0 (let ((.cse10 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 4))) (let ((.cse5 (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store .cse12 .cse10 v_ArrVal_4330)))) (let ((.cse6 (select .cse5 .cse1))) (let ((.cse4 (select .cse6 (+ .cse11 8))) (.cse7 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse8 (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8))) (select (select (store (store .cse0 .cse1 (store .cse2 .cse3 v_ArrVal_4337)) .cse4 v_ArrVal_4338) (select (select (store (store .cse5 .cse1 (store .cse6 .cse3 v_ArrVal_4336)) .cse4 v_ArrVal_4340) .cse7) .cse8)) (+ (select (select (store (store (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store .cse9 .cse10 v_ArrVal_4328)) .cse1 v_ArrVal_4334) .cse4 v_ArrVal_4339) .cse7) .cse8) 4))))))) (< (+ v_ArrVal_4337 1) (select .cse2 .cse3))))))) is different from false [2023-12-21 03:52:41,300 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4340 (Array Int Int)) (v_ArrVal_4331 (Array Int Int)) (v_ArrVal_4328 Int) (v_ArrVal_4336 Int) (v_ArrVal_4334 (Array Int Int)) (v_ArrVal_4337 Int) (v_ArrVal_4338 (Array Int Int)) (v_ArrVal_4339 (Array Int Int)) (v_ArrVal_4330 Int)) (let ((.cse13 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse7 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse12 (select |c_#memory_$Pointer$#2.base| .cse7)) (.cse9 (select |c_#memory_$Pointer$#2.offset| .cse7)) (.cse8 (+ .cse13 8))) (let ((.cse11 (select .cse9 .cse8)) (.cse0 (store |c_#memory_int#2| .cse7 v_ArrVal_4331)) (.cse1 (select .cse12 .cse8))) (let ((.cse2 (select .cse0 .cse1)) (.cse3 (+ .cse11 4))) (or (< 0 (let ((.cse10 (+ .cse13 4))) (let ((.cse5 (store |c_#memory_$Pointer$#2.base| .cse7 (store .cse12 .cse10 v_ArrVal_4330)))) (let ((.cse6 (select .cse5 .cse1))) (let ((.cse4 (select .cse6 (+ .cse11 8)))) (select (select (store (store .cse0 .cse1 (store .cse2 .cse3 v_ArrVal_4337)) .cse4 v_ArrVal_4338) (select (select (store (store .cse5 .cse1 (store .cse6 .cse3 v_ArrVal_4336)) .cse4 v_ArrVal_4340) .cse7) .cse8)) (+ (select (select (store (store (store |c_#memory_$Pointer$#2.offset| .cse7 (store .cse9 .cse10 v_ArrVal_4328)) .cse1 v_ArrVal_4334) .cse4 v_ArrVal_4339) .cse7) .cse8) 4))))))) (< (+ v_ArrVal_4337 1) (select .cse2 .cse3)))))))) is different from false [2023-12-21 03:52:41,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:41,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 205 treesize of output 172 [2023-12-21 03:52:41,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:41,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 161 [2023-12-21 03:52:41,559 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 1108 treesize of output 1096 [2023-12-21 03:52:41,568 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 261 treesize of output 257 [2023-12-21 03:52:41,575 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 264 treesize of output 262 [2023-12-21 03:52:41,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:41,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 142 [2023-12-21 03:52:41,945 INFO L349 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2023-12-21 03:52:41,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 122 [2023-12-21 03:52:42,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:42,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 80 [2023-12-21 03:52:42,023 INFO L349 Elim1Store]: treesize reduction 26, result has 60.6 percent of original size [2023-12-21 03:52:42,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 92 [2023-12-21 03:52:45,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:45,291 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 3479 treesize of output 2460 [2023-12-21 03:52:45,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:45,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 13519 treesize of output 13603 [2023-12-21 03:52:45,718 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 4669 treesize of output 4189 [2023-12-21 03:52:45,968 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 2913 treesize of output 2731 [2023-12-21 03:52:46,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:46,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2702 treesize of output 2689 [2023-12-21 03:52:46,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:46,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2750 treesize of output 2665 [2023-12-21 03:52:46,461 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 2721 treesize of output 2609 [2023-12-21 03:52:46,551 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 2621 treesize of output 2551 [2023-12-21 03:52:46,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:46,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2486 treesize of output 2459 [2023-12-21 03:52:46,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:46,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2450 treesize of output 2453 [2023-12-21 03:52:46,867 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 2521 treesize of output 2481 [2023-12-21 03:52:46,976 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 2493 treesize of output 2465 [2023-12-21 03:52:47,064 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 2404 treesize of output 2400 [2023-12-21 03:52:47,154 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 2473 treesize of output 2403 [2023-12-21 03:52:47,282 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 2344 treesize of output 2312 [2023-12-21 03:52:47,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:47,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2332 treesize of output 2323 [2023-12-21 03:52:47,482 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 2314 treesize of output 2294 [2023-12-21 03:52:47,578 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 2365 treesize of output 2323 [2023-12-21 03:52:47,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 03:52:47,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2266 treesize of output 2257 [2023-12-21 03:52:47,791 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 2248 treesize of output 2246 [2023-12-21 04:00:28,037 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-21 04:00:28,038 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-21 04:00:28,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-21 04:00:28,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-21 04:00:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:00:28,239 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:495) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.pushInner(QuantifierPusher.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:177) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 75 more [2023-12-21 04:00:28,242 INFO L158 Benchmark]: Toolchain (without parser) took 590106.02ms. Allocated memory was 263.2MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 210.5MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 846.4MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,242 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 176.2MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 04:00:28,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.37ms. Allocated memory is still 263.2MB. Free memory was 210.5MB in the beginning and 192.7MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,243 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.79ms. Allocated memory is still 263.2MB. Free memory was 192.7MB in the beginning and 190.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,243 INFO L158 Benchmark]: Boogie Preprocessor took 34.37ms. Allocated memory is still 263.2MB. Free memory was 190.6MB in the beginning and 187.5MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,243 INFO L158 Benchmark]: RCFGBuilder took 404.70ms. Allocated memory is still 263.2MB. Free memory was 187.5MB in the beginning and 168.1MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,243 INFO L158 Benchmark]: TraceAbstraction took 589280.99ms. Allocated memory was 263.2MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 167.6MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 803.4MB. Max. memory is 8.0GB. [2023-12-21 04:00:28,243 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 176.2MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 341.37ms. Allocated memory is still 263.2MB. Free memory was 210.5MB in the beginning and 192.7MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.79ms. Allocated memory is still 263.2MB. Free memory was 192.7MB in the beginning and 190.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.37ms. Allocated memory is still 263.2MB. Free memory was 190.6MB in the beginning and 187.5MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 404.70ms. Allocated memory is still 263.2MB. Free memory was 187.5MB in the beginning and 168.1MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 589280.99ms. Allocated memory was 263.2MB in the beginning and 1.4GB in the end (delta: 1.1GB). Free memory was 167.6MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 803.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...