/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/heap-data/process_queue.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 21:56:06,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 21:56:06,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 21:56:06,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 21:56:06,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 21:56:06,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 21:56:06,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 21:56:06,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 21:56:06,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 21:56:06,620 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 21:56:06,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 21:56:06,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 21:56:06,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 21:56:06,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 21:56:06,622 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 21:56:06,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 21:56:06,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 21:56:06,623 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 21:56:06,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 21:56:06,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 21:56:06,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 21:56:06,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 21:56:06,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 21:56:06,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 21:56:06,628 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 21:56:06,629 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 21:56:06,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 21:56:06,629 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 21:56:06,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 21:56:06,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 21:56:06,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 21:56:06,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 21:56:06,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:56:06,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 21:56:06,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 21:56:06,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 21:56:06,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 21:56:06,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 21:56:06,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 21:56:06,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 21:56:06,632 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 21:56:06,636 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 21:56:06,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 21:56:06,636 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 21:56:06,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 21:56:06,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 21:56:06,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 21:56:06,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 21:56:06,856 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 21:56:06,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/process_queue.i [2023-12-15 21:56:07,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 21:56:08,023 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 21:56:08,023 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i [2023-12-15 21:56:08,039 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997446414/08f860e7eb9142e98d245aec0c62e3d7/FLAG1db04f414 [2023-12-15 21:56:08,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997446414/08f860e7eb9142e98d245aec0c62e3d7 [2023-12-15 21:56:08,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 21:56:08,058 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 21:56:08,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 21:56:08,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 21:56:08,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 21:56:08,065 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d4fd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08, skipping insertion in model container [2023-12-15 21:56:08,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,108 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 21:56:08,262 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] [2023-12-15 21:56:08,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:56:08,284 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 21:56:08,333 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] [2023-12-15 21:56:08,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 21:56:08,353 INFO L206 MainTranslator]: Completed translation [2023-12-15 21:56:08,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08 WrapperNode [2023-12-15 21:56:08,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 21:56:08,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 21:56:08,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 21:56:08,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 21:56:08,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,405 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 115 [2023-12-15 21:56:08,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 21:56:08,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 21:56:08,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 21:56:08,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 21:56:08,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,435 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 7 writes are split as follows [0, 5, 2]. [2023-12-15 21:56:08,435 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,436 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 21:56:08,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 21:56:08,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 21:56:08,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 21:56:08,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (1/1) ... [2023-12-15 21:56:08,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 21:56:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:08,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 21:56:08,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 21:56:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 21:56:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-15 21:56:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 21:56:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 21:56:08,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 21:56:08,608 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 21:56:08,609 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 21:56:08,724 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 21:56:08,772 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 21:56:08,772 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 21:56:08,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:08 BoogieIcfgContainer [2023-12-15 21:56:08,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 21:56:08,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 21:56:08,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 21:56:08,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 21:56:08,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:56:08" (1/3) ... [2023-12-15 21:56:08,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fdbb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:08, skipping insertion in model container [2023-12-15 21:56:08,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:56:08" (2/3) ... [2023-12-15 21:56:08,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fdbb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:56:08, skipping insertion in model container [2023-12-15 21:56:08,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:56:08" (3/3) ... [2023-12-15 21:56:08,777 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2023-12-15 21:56:08,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 21:56:08,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 21:56:08,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 21:56:08,819 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;@4418c6fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 21:56:08,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 21:56:08,822 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) [2023-12-15 21:56:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 21:56:08,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:08,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:08,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:08,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -638587651, now seen corresponding path program 1 times [2023-12-15 21:56:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068943526] [2023-12-15 21:56:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:09,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:09,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068943526] [2023-12-15 21:56:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068943526] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:09,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:56:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404951307] [2023-12-15 21:56:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:09,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:56:09,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:56:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:56:09,065 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) [2023-12-15 21:56:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:09,099 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2023-12-15 21:56:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:56:09,101 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 [2023-12-15 21:56:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:09,105 INFO L225 Difference]: With dead ends: 40 [2023-12-15 21:56:09,105 INFO L226 Difference]: Without dead ends: 19 [2023-12-15 21:56:09,107 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 [2023-12-15 21:56:09,111 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 [2023-12-15 21:56:09,112 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] [2023-12-15 21:56:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-15 21:56:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-15 21:56:09,136 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) [2023-12-15 21:56:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-12-15 21:56:09,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2023-12-15 21:56:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:09,140 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-12-15 21:56:09,140 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) [2023-12-15 21:56:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-12-15 21:56:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-15 21:56:09,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:09,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:09,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 21:56:09,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:09,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash -695845953, now seen corresponding path program 1 times [2023-12-15 21:56:09,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:09,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809853439] [2023-12-15 21:56:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:09,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:09,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809853439] [2023-12-15 21:56:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809853439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:09,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:09,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 21:56:09,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776087436] [2023-12-15 21:56:09,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:09,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 21:56:09,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 21:56:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 21:56:09,488 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) [2023-12-15 21:56:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:09,624 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2023-12-15 21:56:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 21:56:09,625 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 [2023-12-15 21:56:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:09,626 INFO L225 Difference]: With dead ends: 71 [2023-12-15 21:56:09,626 INFO L226 Difference]: Without dead ends: 53 [2023-12-15 21:56:09,627 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 [2023-12-15 21:56:09,627 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 [2023-12-15 21:56:09,628 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] [2023-12-15 21:56:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-15 21:56:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2023-12-15 21:56:09,633 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) [2023-12-15 21:56:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2023-12-15 21:56:09,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 9 [2023-12-15 21:56:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:09,634 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2023-12-15 21:56:09,634 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) [2023-12-15 21:56:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2023-12-15 21:56:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 21:56:09,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:09,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:09,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 21:56:09,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:09,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -442026085, now seen corresponding path program 1 times [2023-12-15 21:56:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204827269] [2023-12-15 21:56:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:09,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204827269] [2023-12-15 21:56:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204827269] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:09,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:09,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:56:09,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476285000] [2023-12-15 21:56:09,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:09,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:56:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:56:09,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:56:09,674 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) [2023-12-15 21:56:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:09,714 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2023-12-15 21:56:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:56:09,715 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 [2023-12-15 21:56:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:09,716 INFO L225 Difference]: With dead ends: 90 [2023-12-15 21:56:09,716 INFO L226 Difference]: Without dead ends: 46 [2023-12-15 21:56:09,716 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 [2023-12-15 21:56:09,717 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 [2023-12-15 21:56:09,717 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] [2023-12-15 21:56:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-15 21:56:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-12-15 21:56:09,721 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) [2023-12-15 21:56:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-12-15 21:56:09,721 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 10 [2023-12-15 21:56:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:09,721 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-12-15 21:56:09,722 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) [2023-12-15 21:56:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-12-15 21:56:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 21:56:09,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:09,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:09,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 21:56:09,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:09,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2077933849, now seen corresponding path program 1 times [2023-12-15 21:56:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685088338] [2023-12-15 21:56:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685088338] [2023-12-15 21:56:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685088338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:09,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:56:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607693220] [2023-12-15 21:56:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:56:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:56:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:56:09,802 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) [2023-12-15 21:56:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:09,861 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2023-12-15 21:56:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 21:56:09,861 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 [2023-12-15 21:56:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:09,862 INFO L225 Difference]: With dead ends: 85 [2023-12-15 21:56:09,862 INFO L226 Difference]: Without dead ends: 42 [2023-12-15 21:56:09,864 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 [2023-12-15 21:56:09,869 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 [2023-12-15 21:56:09,870 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] [2023-12-15 21:56:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-15 21:56:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-15 21:56:09,873 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) [2023-12-15 21:56:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2023-12-15 21:56:09,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 10 [2023-12-15 21:56:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2023-12-15 21:56:09,874 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) [2023-12-15 21:56:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2023-12-15 21:56:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-15 21:56:09,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:09,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-15 21:56:09,875 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:09,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1864264615, now seen corresponding path program 1 times [2023-12-15 21:56:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:09,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146632522] [2023-12-15 21:56:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146632522] [2023-12-15 21:56:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146632522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734354752] [2023-12-15 21:56:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:10,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:10,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:56:10,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 21:56:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:10,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-15 21:56:10,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:10,313 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 19 treesize of output 11 [2023-12-15 21:56:10,320 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 [2023-12-15 21:56:10,326 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 [2023-12-15 21:56:10,331 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 [2023-12-15 21:56:10,349 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 [2023-12-15 21:56:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:10,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734354752] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:10,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-12-15 21:56:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873044882] [2023-12-15 21:56:10,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:10,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:56:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:56:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:56:10,445 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) [2023-12-15 21:56:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:10,621 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2023-12-15 21:56:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:56:10,621 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 [2023-12-15 21:56:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:10,622 INFO L225 Difference]: With dead ends: 77 [2023-12-15 21:56:10,622 INFO L226 Difference]: Without dead ends: 44 [2023-12-15 21:56:10,622 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 [2023-12-15 21:56:10,623 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 [2023-12-15 21:56:10,623 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] [2023-12-15 21:56:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-15 21:56:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-12-15 21:56:10,626 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) [2023-12-15 21:56:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2023-12-15 21:56:10,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 12 [2023-12-15 21:56:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:10,627 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2023-12-15 21:56:10,627 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) [2023-12-15 21:56:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2023-12-15 21:56:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-15 21:56:10,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:10,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:10,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 21:56:10,828 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 [2023-12-15 21:56:10,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:10,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1675409667, now seen corresponding path program 1 times [2023-12-15 21:56:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:10,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788582767] [2023-12-15 21:56:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:10,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:10,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:10,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788582767] [2023-12-15 21:56:10,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788582767] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:10,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:10,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 21:56:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890354503] [2023-12-15 21:56:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 21:56:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 21:56:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 21:56:10,923 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) [2023-12-15 21:56:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:10,964 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2023-12-15 21:56:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 21:56:10,965 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 [2023-12-15 21:56:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:10,966 INFO L225 Difference]: With dead ends: 96 [2023-12-15 21:56:10,966 INFO L226 Difference]: Without dead ends: 64 [2023-12-15 21:56:10,967 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 [2023-12-15 21:56:10,968 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 [2023-12-15 21:56:10,968 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] [2023-12-15 21:56:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-15 21:56:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-12-15 21:56:10,982 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) [2023-12-15 21:56:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2023-12-15 21:56:10,982 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 16 [2023-12-15 21:56:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:10,982 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2023-12-15 21:56:10,982 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) [2023-12-15 21:56:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2023-12-15 21:56:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 21:56:10,983 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:10,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:56:10,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-15 21:56:10,984 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:10,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -342731749, now seen corresponding path program 1 times [2023-12-15 21:56:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:10,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098363569] [2023-12-15 21:56:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098363569] [2023-12-15 21:56:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098363569] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817419336] [2023-12-15 21:56:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:11,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:11,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:11,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:56:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 21:56:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:11,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-15 21:56:11,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:11,359 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 [2023-12-15 21:56:11,383 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 [2023-12-15 21:56:11,396 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 15 treesize of output 1 [2023-12-15 21:56:11,418 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 [2023-12-15 21:56:11,436 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 [2023-12-15 21:56:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:11,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817419336] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:11,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:11,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-15 21:56:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427974060] [2023-12-15 21:56:11,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 21:56:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 21:56:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:56:11,516 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) [2023-12-15 21:56:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:11,943 INFO L93 Difference]: Finished difference Result 261 states and 351 transitions. [2023-12-15 21:56:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-15 21:56:11,943 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 [2023-12-15 21:56:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:11,944 INFO L225 Difference]: With dead ends: 261 [2023-12-15 21:56:11,945 INFO L226 Difference]: Without dead ends: 212 [2023-12-15 21:56:11,945 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 [2023-12-15 21:56:11,946 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 [2023-12-15 21:56:11,946 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] [2023-12-15 21:56:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-15 21:56:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2023-12-15 21:56:11,956 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) [2023-12-15 21:56:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 233 transitions. [2023-12-15 21:56:11,957 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 233 transitions. Word has length 19 [2023-12-15 21:56:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:11,957 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 233 transitions. [2023-12-15 21:56:11,957 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) [2023-12-15 21:56:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 233 transitions. [2023-12-15 21:56:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 21:56:11,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:11,958 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-15 21:56:11,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:12,165 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 [2023-12-15 21:56:12,165 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:12,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1180359221, now seen corresponding path program 2 times [2023-12-15 21:56:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406880621] [2023-12-15 21:56:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406880621] [2023-12-15 21:56:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406880621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100155052] [2023-12-15 21:56:12,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 21:56:12,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:12,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:56:12,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 21:56:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 21:56:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:12,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-15 21:56:12,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:12,810 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 [2023-12-15 21:56:12,813 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 [2023-12-15 21:56:12,816 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 [2023-12-15 21:56:12,940 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 [2023-12-15 21:56:12,945 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 [2023-12-15 21:56:12,959 INFO L349 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2023-12-15 21:56:12,960 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 32 treesize of output 35 [2023-12-15 21:56:12,979 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-15 21:56:12,979 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 [2023-12-15 21:56:12,990 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 [2023-12-15 21:56:12,995 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 [2023-12-15 21:56:13,025 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 [2023-12-15 21:56:13,073 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 [2023-12-15 21:56:13,077 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 [2023-12-15 21:56:13,092 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 [2023-12-15 21:56:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:13,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:13,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:13,296 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 55 treesize of output 54 [2023-12-15 21:56:13,302 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 19 treesize of output 11 [2023-12-15 21:56:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100155052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:13,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:13,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-12-15 21:56:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922075335] [2023-12-15 21:56:13,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:13,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 21:56:13,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 21:56:13,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-12-15 21:56:13,385 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) [2023-12-15 21:56:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:14,984 INFO L93 Difference]: Finished difference Result 548 states and 732 transitions. [2023-12-15 21:56:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-15 21:56:14,985 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 [2023-12-15 21:56:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:14,986 INFO L225 Difference]: With dead ends: 548 [2023-12-15 21:56:14,986 INFO L226 Difference]: Without dead ends: 393 [2023-12-15 21:56:14,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=640, Invalid=2330, Unknown=0, NotChecked=0, Total=2970 [2023-12-15 21:56:14,988 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 302 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:14,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 510 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-15 21:56:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-15 21:56:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 232. [2023-12-15 21:56:15,010 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) [2023-12-15 21:56:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2023-12-15 21:56:15,011 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 22 [2023-12-15 21:56:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:15,011 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2023-12-15 21:56:15,011 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) [2023-12-15 21:56:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2023-12-15 21:56:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 21:56:15,014 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:15,015 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] [2023-12-15 21:56:15,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 21:56:15,219 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 [2023-12-15 21:56:15,220 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:15,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash 858311097, now seen corresponding path program 1 times [2023-12-15 21:56:15,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:15,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328338249] [2023-12-15 21:56:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 21:56:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328338249] [2023-12-15 21:56:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328338249] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356774209] [2023-12-15 21:56:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:15,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:56:15,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 21:56:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:15,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 21:56:15,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 21:56:15,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 21:56:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356774209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:15,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:15,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-15 21:56:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386426422] [2023-12-15 21:56:15,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:56:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:56:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:56:15,420 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) [2023-12-15 21:56:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:15,511 INFO L93 Difference]: Finished difference Result 673 states and 910 transitions. [2023-12-15 21:56:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 21:56:15,511 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 [2023-12-15 21:56:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:15,513 INFO L225 Difference]: With dead ends: 673 [2023-12-15 21:56:15,513 INFO L226 Difference]: Without dead ends: 460 [2023-12-15 21:56:15,514 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 [2023-12-15 21:56:15,515 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 [2023-12-15 21:56:15,515 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] [2023-12-15 21:56:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-12-15 21:56:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 364. [2023-12-15 21:56:15,531 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) [2023-12-15 21:56:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 481 transitions. [2023-12-15 21:56:15,531 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 481 transitions. Word has length 25 [2023-12-15 21:56:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:15,532 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 481 transitions. [2023-12-15 21:56:15,532 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) [2023-12-15 21:56:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 481 transitions. [2023-12-15 21:56:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 21:56:15,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:15,532 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-15 21:56:15,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:15,739 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 [2023-12-15 21:56:15,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:15,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1180387813, now seen corresponding path program 3 times [2023-12-15 21:56:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145182857] [2023-12-15 21:56:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:16,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145182857] [2023-12-15 21:56:16,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145182857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671927890] [2023-12-15 21:56:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 21:56:16,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:16,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 21:56:16,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 21:56:16,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 21:56:16,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:16,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-15 21:56:16,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:16,335 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 [2023-12-15 21:56:16,338 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 [2023-12-15 21:56:16,342 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 [2023-12-15 21:56:16,346 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 [2023-12-15 21:56:16,351 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 [2023-12-15 21:56:16,427 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 [2023-12-15 21:56:16,433 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 [2023-12-15 21:56:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:16,438 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 [2023-12-15 21:56:16,450 INFO L349 Elim1Store]: treesize reduction 34, result has 46.0 percent of original size [2023-12-15 21:56:16,450 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 [2023-12-15 21:56:16,453 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 [2023-12-15 21:56:16,468 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-15 21:56:16,468 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 [2023-12-15 21:56:16,475 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 [2023-12-15 21:56:16,499 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 [2023-12-15 21:56:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:16,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:16,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:16,657 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 [2023-12-15 21:56:16,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:16,662 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 [2023-12-15 21:56:16,677 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 [2023-12-15 21:56:16,692 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 [2023-12-15 21:56:16,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:16,925 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 [2023-12-15 21:56:16,927 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-15 21:56:16,928 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 [2023-12-15 21:56:16,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:16,933 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 [2023-12-15 21:56:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-15 21:56:16,936 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 [2023-12-15 21:56:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671927890] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:16,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-15 21:56:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902734383] [2023-12-15 21:56:16,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-15 21:56:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-15 21:56:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-15 21:56:16,945 INFO L87 Difference]: Start difference. First operand 364 states and 481 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:17,394 INFO L93 Difference]: Finished difference Result 765 states and 1016 transitions. [2023-12-15 21:56:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 21:56:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 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 [2023-12-15 21:56:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:17,399 INFO L225 Difference]: With dead ends: 765 [2023-12-15 21:56:17,399 INFO L226 Difference]: Without dead ends: 434 [2023-12-15 21:56:17,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-15 21:56:17,400 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:17,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 21:56:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-12-15 21:56:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2023-12-15 21:56:17,419 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) [2023-12-15 21:56:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 552 transitions. [2023-12-15 21:56:17,420 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 552 transitions. Word has length 25 [2023-12-15 21:56:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:17,420 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 552 transitions. [2023-12-15 21:56:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 552 transitions. [2023-12-15 21:56:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 21:56:17,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:17,421 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] [2023-12-15 21:56:17,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:17,640 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 [2023-12-15 21:56:17,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:17,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 600145659, now seen corresponding path program 1 times [2023-12-15 21:56:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194733240] [2023-12-15 21:56:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194733240] [2023-12-15 21:56:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194733240] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460388642] [2023-12-15 21:56:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:17,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:17,843 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) [2023-12-15 21:56:17,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 21:56:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:17,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-15 21:56:17,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:17,968 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 [2023-12-15 21:56:17,971 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 [2023-12-15 21:56:17,974 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 [2023-12-15 21:56:18,020 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 [2023-12-15 21:56:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:18,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:18,062 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 [2023-12-15 21:56:18,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:18,067 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 [2023-12-15 21:56:18,068 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 [2023-12-15 21:56:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460388642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:18,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-15 21:56:18,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703621133] [2023-12-15 21:56:18,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 21:56:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 21:56:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:56:18,074 INFO L87 Difference]: Start difference. First operand 424 states and 552 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:18,212 INFO L93 Difference]: Finished difference Result 811 states and 1065 transitions. [2023-12-15 21:56:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 21:56:18,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 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 [2023-12-15 21:56:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:18,214 INFO L225 Difference]: With dead ends: 811 [2023-12-15 21:56:18,215 INFO L226 Difference]: Without dead ends: 480 [2023-12-15 21:56:18,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-12-15 21:56:18,215 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:18,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 105 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:56:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-12-15 21:56:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 425. [2023-12-15 21:56:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.304245283018868) internal successors, (553), 424 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 553 transitions. [2023-12-15 21:56:18,239 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 553 transitions. Word has length 25 [2023-12-15 21:56:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:18,240 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 553 transitions. [2023-12-15 21:56:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 553 transitions. [2023-12-15 21:56:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 21:56:18,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:18,241 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] [2023-12-15 21:56:18,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:18,445 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 [2023-12-15 21:56:18,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:18,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1953335290, now seen corresponding path program 1 times [2023-12-15 21:56:18,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:18,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010757049] [2023-12-15 21:56:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 21:56:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010757049] [2023-12-15 21:56:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010757049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300822244] [2023-12-15 21:56:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:18,563 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) [2023-12-15 21:56:18,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 21:56:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:18,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-15 21:56:18,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:18,754 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 [2023-12-15 21:56:18,757 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 [2023-12-15 21:56:18,775 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 [2023-12-15 21:56:18,777 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 [2023-12-15 21:56:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 21:56:18,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:18,865 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 [2023-12-15 21:56:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 21:56:18,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300822244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:18,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:18,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-15 21:56:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130139844] [2023-12-15 21:56:18,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:18,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 21:56:18,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 21:56:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:56:18,879 INFO L87 Difference]: Start difference. First operand 425 states and 553 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) [2023-12-15 21:56:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:19,034 INFO L93 Difference]: Finished difference Result 759 states and 1003 transitions. [2023-12-15 21:56:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 21:56:19,035 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 [2023-12-15 21:56:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:19,036 INFO L225 Difference]: With dead ends: 759 [2023-12-15 21:56:19,036 INFO L226 Difference]: Without dead ends: 341 [2023-12-15 21:56:19,036 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 [2023-12-15 21:56:19,037 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:19,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:56:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-12-15 21:56:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 282. [2023-12-15 21:56:19,050 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) [2023-12-15 21:56:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 365 transitions. [2023-12-15 21:56:19,050 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 365 transitions. Word has length 26 [2023-12-15 21:56:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:19,050 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 365 transitions. [2023-12-15 21:56:19,050 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) [2023-12-15 21:56:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 365 transitions. [2023-12-15 21:56:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 21:56:19,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:19,052 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] [2023-12-15 21:56:19,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:19,257 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 [2023-12-15 21:56:19,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:19,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1532285380, now seen corresponding path program 1 times [2023-12-15 21:56:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301101298] [2023-12-15 21:56:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 21:56:19,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301101298] [2023-12-15 21:56:19,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301101298] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 21:56:19,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 21:56:19,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 21:56:19,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868271620] [2023-12-15 21:56:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 21:56:19,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 21:56:19,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 21:56:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 21:56:19,290 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) [2023-12-15 21:56:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:19,321 INFO L93 Difference]: Finished difference Result 553 states and 728 transitions. [2023-12-15 21:56:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 21:56:19,321 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 [2023-12-15 21:56:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:19,322 INFO L225 Difference]: With dead ends: 553 [2023-12-15 21:56:19,323 INFO L226 Difference]: Without dead ends: 301 [2023-12-15 21:56:19,323 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 [2023-12-15 21:56:19,324 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 [2023-12-15 21:56:19,324 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] [2023-12-15 21:56:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-15 21:56:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 292. [2023-12-15 21:56:19,341 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) [2023-12-15 21:56:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 382 transitions. [2023-12-15 21:56:19,342 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 382 transitions. Word has length 26 [2023-12-15 21:56:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:19,343 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 382 transitions. [2023-12-15 21:56:19,343 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) [2023-12-15 21:56:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 382 transitions. [2023-12-15 21:56:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-15 21:56:19,343 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:19,343 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] [2023-12-15 21:56:19,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-15 21:56:19,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:19,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1394794225, now seen corresponding path program 1 times [2023-12-15 21:56:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:19,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542900327] [2023-12-15 21:56:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:19,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542900327] [2023-12-15 21:56:19,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542900327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770817087] [2023-12-15 21:56:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:19,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:19,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:19,570 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) [2023-12-15 21:56:19,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 21:56:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:19,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-15 21:56:19,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:19,726 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 [2023-12-15 21:56:19,729 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 [2023-12-15 21:56:19,732 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 [2023-12-15 21:56:19,736 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-15 21:56:19,808 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 [2023-12-15 21:56:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:19,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:19,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770817087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:19,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-12-15 21:56:19,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46461226] [2023-12-15 21:56:19,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 21:56:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 21:56:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-15 21:56:19,900 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) [2023-12-15 21:56:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:20,078 INFO L93 Difference]: Finished difference Result 599 states and 785 transitions. [2023-12-15 21:56:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 21:56:20,078 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 [2023-12-15 21:56:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:20,079 INFO L225 Difference]: With dead ends: 599 [2023-12-15 21:56:20,079 INFO L226 Difference]: Without dead ends: 337 [2023-12-15 21:56:20,080 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 [2023-12-15 21:56:20,080 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:20,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 108 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:56:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-12-15 21:56:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 320. [2023-12-15 21:56:20,094 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) [2023-12-15 21:56:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 415 transitions. [2023-12-15 21:56:20,095 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 415 transitions. Word has length 29 [2023-12-15 21:56:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:20,095 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 415 transitions. [2023-12-15 21:56:20,095 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) [2023-12-15 21:56:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 415 transitions. [2023-12-15 21:56:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-15 21:56:20,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:20,096 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-15 21:56:20,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:20,300 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 [2023-12-15 21:56:20,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:20,301 INFO L85 PathProgramCache]: Analyzing trace with hash 546084471, now seen corresponding path program 4 times [2023-12-15 21:56:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827682962] [2023-12-15 21:56:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 21:56:20,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:20,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827682962] [2023-12-15 21:56:20,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827682962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:20,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340213082] [2023-12-15 21:56:20,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 21:56:20,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:20,530 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) [2023-12-15 21:56:20,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 21:56:20,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 21:56:20,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:20,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-15 21:56:20,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:20,680 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 [2023-12-15 21:56:20,695 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 [2023-12-15 21:56:20,696 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 [2023-12-15 21:56:20,699 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 [2023-12-15 21:56:20,708 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 [2023-12-15 21:56:20,716 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 [2023-12-15 21:56:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 21:56:20,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 21:56:20,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340213082] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:20,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-12-15 21:56:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101045988] [2023-12-15 21:56:20,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:20,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 21:56:20,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 21:56:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-15 21:56:20,746 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) [2023-12-15 21:56:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:20,878 INFO L93 Difference]: Finished difference Result 646 states and 841 transitions. [2023-12-15 21:56:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 21:56:20,878 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 [2023-12-15 21:56:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:20,881 INFO L225 Difference]: With dead ends: 646 [2023-12-15 21:56:20,881 INFO L226 Difference]: Without dead ends: 384 [2023-12-15 21:56:20,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-12-15 21:56:20,883 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:20,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:56:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-12-15 21:56:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 317. [2023-12-15 21:56:20,900 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) [2023-12-15 21:56:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 405 transitions. [2023-12-15 21:56:20,901 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 405 transitions. Word has length 35 [2023-12-15 21:56:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:20,901 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 405 transitions. [2023-12-15 21:56:20,901 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) [2023-12-15 21:56:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 405 transitions. [2023-12-15 21:56:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-15 21:56:20,902 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:20,902 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] [2023-12-15 21:56:20,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-15 21:56:21,106 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 [2023-12-15 21:56:21,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:21,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -833058966, now seen corresponding path program 2 times [2023-12-15 21:56:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220008815] [2023-12-15 21:56:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 21:56:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220008815] [2023-12-15 21:56:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220008815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721999041] [2023-12-15 21:56:21,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 21:56:21,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:21,342 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) [2023-12-15 21:56:21,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 21:56:21,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 21:56:21,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:21,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-15 21:56:21,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:21,513 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 [2023-12-15 21:56:21,518 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 [2023-12-15 21:56:21,521 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 [2023-12-15 21:56:21,524 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 [2023-12-15 21:56:21,533 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 [2023-12-15 21:56:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 21:56:21,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 21:56:21,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721999041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:21,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:21,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-12-15 21:56:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121830817] [2023-12-15 21:56:21,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:21,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-15 21:56:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-15 21:56:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-15 21:56:21,612 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) [2023-12-15 21:56:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:21,842 INFO L93 Difference]: Finished difference Result 723 states and 933 transitions. [2023-12-15 21:56:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 21:56:21,843 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 [2023-12-15 21:56:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:21,845 INFO L225 Difference]: With dead ends: 723 [2023-12-15 21:56:21,845 INFO L226 Difference]: Without dead ends: 436 [2023-12-15 21:56:21,845 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 [2023-12-15 21:56:21,846 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 186 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 21:56:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-15 21:56:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2023-12-15 21:56:21,864 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) [2023-12-15 21:56:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 469 transitions. [2023-12-15 21:56:21,865 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 469 transitions. Word has length 36 [2023-12-15 21:56:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:21,865 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 469 transitions. [2023-12-15 21:56:21,865 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) [2023-12-15 21:56:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 469 transitions. [2023-12-15 21:56:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-15 21:56:21,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:21,866 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-15 21:56:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:22,071 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 [2023-12-15 21:56:22,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:22,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1381627865, now seen corresponding path program 5 times [2023-12-15 21:56:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:22,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246755452] [2023-12-15 21:56:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 21:56:23,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:23,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246755452] [2023-12-15 21:56:23,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246755452] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:23,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252067913] [2023-12-15 21:56:23,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 21:56:23,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:23,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:23,190 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) [2023-12-15 21:56:23,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 21:56:23,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-15 21:56:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:23,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-15 21:56:23,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:23,426 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 [2023-12-15 21:56:23,428 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 [2023-12-15 21:56:23,431 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 [2023-12-15 21:56:23,434 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 [2023-12-15 21:56:23,536 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 19 treesize of output 11 [2023-12-15 21:56:23,540 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 [2023-12-15 21:56:23,556 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-12-15 21:56:23,556 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 29 treesize of output 37 [2023-12-15 21:56:23,560 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 63 treesize of output 32 [2023-12-15 21:56:23,564 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 [2023-12-15 21:56:23,569 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 [2023-12-15 21:56:23,763 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 [2023-12-15 21:56:23,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:23,767 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 [2023-12-15 21:56:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:23,775 INFO L349 Elim1Store]: treesize reduction 4, result has 83.3 percent of original size [2023-12-15 21:56:23,776 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 [2023-12-15 21:56:23,779 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 [2023-12-15 21:56:23,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:23,783 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 [2023-12-15 21:56:23,785 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 [2023-12-15 21:56:23,790 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 [2023-12-15 21:56:23,795 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 [2023-12-15 21:56:23,840 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 97 treesize of output 65 [2023-12-15 21:56:23,963 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-15 21:56:23,963 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 [2023-12-15 21:56:23,969 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 [2023-12-15 21:56:23,997 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 [2023-12-15 21:56:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:24,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:24,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:24,111 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 [2023-12-15 21:56:24,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:24,116 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 [2023-12-15 21:56:24,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:24,312 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 [2023-12-15 21:56:24,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:24,318 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 [2023-12-15 21:56:24,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-15 21:56:24,322 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 [2023-12-15 21:56:24,326 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 [2023-12-15 21:56:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-15 21:56:24,329 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 [2023-12-15 21:56:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 54 refuted. 1 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 21:56:24,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252067913] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:24,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 33 [2023-12-15 21:56:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127796577] [2023-12-15 21:56:24,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-15 21:56:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-15 21:56:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=925, Unknown=2, NotChecked=0, Total=1056 [2023-12-15 21:56:24,560 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) [2023-12-15 21:56:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:26,555 INFO L93 Difference]: Finished difference Result 521 states and 658 transitions. [2023-12-15 21:56:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-15 21:56:26,555 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 [2023-12-15 21:56:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:26,557 INFO L225 Difference]: With dead ends: 521 [2023-12-15 21:56:26,557 INFO L226 Difference]: Without dead ends: 519 [2023-12-15 21:56:26,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=756, Invalid=3532, Unknown=2, NotChecked=0, Total=4290 [2023-12-15 21:56:26,559 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 226 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:26,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 475 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:56:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-12-15 21:56:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 414. [2023-12-15 21:56:26,592 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) [2023-12-15 21:56:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 531 transitions. [2023-12-15 21:56:26,593 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 531 transitions. Word has length 38 [2023-12-15 21:56:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:26,593 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 531 transitions. [2023-12-15 21:56:26,594 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) [2023-12-15 21:56:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 531 transitions. [2023-12-15 21:56:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 21:56:26,594 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:26,594 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-12-15 21:56:26,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:26,799 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 [2023-12-15 21:56:26,800 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:26,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1400216001, now seen corresponding path program 6 times [2023-12-15 21:56:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:26,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375348036] [2023-12-15 21:56:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:27,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375348036] [2023-12-15 21:56:27,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375348036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:27,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895883993] [2023-12-15 21:56:27,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 21:56:27,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:27,720 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) [2023-12-15 21:56:27,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 21:56:27,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-15 21:56:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:27,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-15 21:56:27,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:27,960 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 [2023-12-15 21:56:27,963 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 [2023-12-15 21:56:27,965 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 [2023-12-15 21:56:28,022 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 [2023-12-15 21:56:28,026 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 [2023-12-15 21:56:28,036 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2023-12-15 21:56:28,037 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 20 treesize of output 22 [2023-12-15 21:56:28,041 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 [2023-12-15 21:56:28,045 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 [2023-12-15 21:56:28,274 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 [2023-12-15 21:56:28,278 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 [2023-12-15 21:56:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-15 21:56:28,289 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2023-12-15 21:56:28,289 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 [2023-12-15 21:56:28,294 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 [2023-12-15 21:56:28,318 INFO L349 Elim1Store]: treesize reduction 74, result has 56.2 percent of original size [2023-12-15 21:56:28,318 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 [2023-12-15 21:56:28,320 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 [2023-12-15 21:56:28,374 INFO L349 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2023-12-15 21:56:28,374 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 [2023-12-15 21:56:28,406 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 [2023-12-15 21:56:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:28,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:28,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:28,707 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 [2023-12-15 21:56:28,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:28,712 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 104 [2023-12-15 21:56:29,509 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2023-12-15 21:56:29,509 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 230 treesize of output 210 [2023-12-15 21:56:29,532 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2023-12-15 21:56:29,533 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 186 treesize of output 166 [2023-12-15 21:56:29,593 INFO L349 Elim1Store]: treesize reduction 72, result has 41.0 percent of original size [2023-12-15 21:56:29,594 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 [2023-12-15 21:56:29,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:29,611 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 [2023-12-15 21:56:29,707 INFO L349 Elim1Store]: treesize reduction 163, result has 34.3 percent of original size [2023-12-15 21:56:29,707 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 463 [2023-12-15 21:56:29,736 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 [2023-12-15 21:56:29,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:29,754 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 201 treesize of output 197 [2023-12-15 21:56:29,764 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 [2023-12-15 21:56:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895883993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2023-12-15 21:56:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478896299] [2023-12-15 21:56:30,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-15 21:56:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-15 21:56:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-12-15 21:56:30,480 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) [2023-12-15 21:56:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:32,522 INFO L93 Difference]: Finished difference Result 947 states and 1217 transitions. [2023-12-15 21:56:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-15 21:56:32,522 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 [2023-12-15 21:56:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:32,523 INFO L225 Difference]: With dead ends: 947 [2023-12-15 21:56:32,523 INFO L226 Difference]: Without dead ends: 590 [2023-12-15 21:56:32,525 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 [2023-12-15 21:56:32,525 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 161 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:32,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 712 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-15 21:56:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-12-15 21:56:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 489. [2023-12-15 21:56:32,559 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) [2023-12-15 21:56:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 622 transitions. [2023-12-15 21:56:32,562 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 622 transitions. Word has length 41 [2023-12-15 21:56:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:32,562 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 622 transitions. [2023-12-15 21:56:32,563 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) [2023-12-15 21:56:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 622 transitions. [2023-12-15 21:56:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 21:56:32,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:32,563 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] [2023-12-15 21:56:32,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:32,769 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 [2023-12-15 21:56:32,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:32,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -373657249, now seen corresponding path program 2 times [2023-12-15 21:56:32,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:32,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58930281] [2023-12-15 21:56:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:32,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 21:56:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58930281] [2023-12-15 21:56:33,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58930281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567902515] [2023-12-15 21:56:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 21:56:33,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:33,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:33,105 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) [2023-12-15 21:56:33,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 21:56:33,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 21:56:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:33,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-15 21:56:33,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:33,293 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 15 treesize of output 1 [2023-12-15 21:56:33,295 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 [2023-12-15 21:56:33,370 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 [2023-12-15 21:56:33,435 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 [2023-12-15 21:56:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 21:56:33,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:33,557 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-12-15 21:56:33,557 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 [2023-12-15 21:56:33,582 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 [2023-12-15 21:56:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 21:56:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567902515] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:33,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-12-15 21:56:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197518938] [2023-12-15 21:56:33,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-15 21:56:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-15 21:56:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-15 21:56:33,600 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) [2023-12-15 21:56:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:35,010 INFO L93 Difference]: Finished difference Result 1630 states and 2175 transitions. [2023-12-15 21:56:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-15 21:56:35,010 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 [2023-12-15 21:56:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:35,013 INFO L225 Difference]: With dead ends: 1630 [2023-12-15 21:56:35,014 INFO L226 Difference]: Without dead ends: 1186 [2023-12-15 21:56:35,015 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 [2023-12-15 21:56:35,016 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:35,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 467 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 21:56:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2023-12-15 21:56:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 876. [2023-12-15 21:56:35,069 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) [2023-12-15 21:56:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1145 transitions. [2023-12-15 21:56:35,070 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1145 transitions. Word has length 41 [2023-12-15 21:56:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:35,070 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 1145 transitions. [2023-12-15 21:56:35,071 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) [2023-12-15 21:56:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1145 transitions. [2023-12-15 21:56:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 21:56:35,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:35,071 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] [2023-12-15 21:56:35,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:35,279 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 [2023-12-15 21:56:35,280 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:35,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash 316955216, now seen corresponding path program 3 times [2023-12-15 21:56:35,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:35,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68650840] [2023-12-15 21:56:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68650840] [2023-12-15 21:56:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68650840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503993000] [2023-12-15 21:56:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 21:56:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:36,009 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) [2023-12-15 21:56:36,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 21:56:36,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 21:56:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:36,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-15 21:56:36,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:36,227 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 [2023-12-15 21:56:36,230 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 [2023-12-15 21:56:36,286 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 [2023-12-15 21:56:36,289 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 11 treesize of output 7 [2023-12-15 21:56:36,293 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 23 treesize of output 15 [2023-12-15 21:56:36,296 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 [2023-12-15 21:56:36,301 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-15 21:56:36,302 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 [2023-12-15 21:56:36,444 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 [2023-12-15 21:56:36,453 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 [2023-12-15 21:56:36,482 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 [2023-12-15 21:56:36,515 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 [2023-12-15 21:56:36,552 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 [2023-12-15 21:56:36,572 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 [2023-12-15 21:56:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 21:56:36,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:44,781 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1672 Int) (v_ArrVal_1673 (Array Int Int))) (let ((.cse3 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse1 (select |c_#memory_int#1| .cse0)) (.cse2 (+ 4 .cse3))) (or (< 0 (select (select (store (store |c_#memory_int#1| .cse0 (store .cse1 .cse2 v_ArrVal_1672)) (select (select |c_#memory_$Pointer$#1.base| .cse0) (+ 8 .cse3)) v_ArrVal_1673) .cse0) .cse2)) (< (+ v_ArrVal_1672 1) (select .cse1 .cse2)))))) is different from false [2023-12-15 21:56:44,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:44,893 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 [2023-12-15 21:56:44,896 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 [2023-12-15 21:56:44,899 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 [2023-12-15 21:56:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 26 not checked. [2023-12-15 21:56:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503993000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:45,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-12-15 21:56:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272726839] [2023-12-15 21:56:45,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:45,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-15 21:56:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-15 21:56:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=619, Unknown=7, NotChecked=50, Total=756 [2023-12-15 21:56:45,002 INFO L87 Difference]: Start difference. First operand 876 states and 1145 transitions. Second operand has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 27 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:46,938 INFO L93 Difference]: Finished difference Result 2092 states and 2739 transitions. [2023-12-15 21:56:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-15 21:56:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 27 states have internal predecessors, (114), 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 [2023-12-15 21:56:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:46,941 INFO L225 Difference]: With dead ends: 2092 [2023-12-15 21:56:46,941 INFO L226 Difference]: Without dead ends: 1273 [2023-12-15 21:56:46,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=540, Invalid=2996, Unknown=8, NotChecked=116, Total=3660 [2023-12-15 21:56:46,947 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 190 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:46,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 637 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 921 Invalid, 0 Unknown, 177 Unchecked, 0.9s Time] [2023-12-15 21:56:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2023-12-15 21:56:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1132. [2023-12-15 21:56:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.295313881520778) internal successors, (1465), 1131 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1465 transitions. [2023-12-15 21:56:47,032 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1465 transitions. Word has length 41 [2023-12-15 21:56:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:47,033 INFO L495 AbstractCegarLoop]: Abstraction has 1132 states and 1465 transitions. [2023-12-15 21:56:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 27 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1465 transitions. [2023-12-15 21:56:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 21:56:47,034 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:47,034 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] [2023-12-15 21:56:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:47,239 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 [2023-12-15 21:56:47,240 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:47,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1343316239, now seen corresponding path program 1 times [2023-12-15 21:56:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230694190] [2023-12-15 21:56:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 21:56:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230694190] [2023-12-15 21:56:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230694190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598629996] [2023-12-15 21:56:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:47,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:47,729 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) [2023-12-15 21:56:47,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 21:56:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:47,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-15 21:56:47,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:48,008 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 [2023-12-15 21:56:48,013 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 [2023-12-15 21:56:48,016 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 [2023-12-15 21:56:48,135 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 [2023-12-15 21:56:48,218 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 [2023-12-15 21:56:48,254 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 [2023-12-15 21:56:48,260 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 [2023-12-15 21:56:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 21:56:48,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:48,447 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 [2023-12-15 21:56:48,451 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 [2023-12-15 21:56:48,453 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 [2023-12-15 21:56:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 21:56:48,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598629996] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:48,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:48,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-12-15 21:56:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772685457] [2023-12-15 21:56:48,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:48,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 21:56:48,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 21:56:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2023-12-15 21:56:48,489 INFO L87 Difference]: Start difference. First operand 1132 states and 1465 transitions. Second operand has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 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) [2023-12-15 21:56:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:49,574 INFO L93 Difference]: Finished difference Result 1317 states and 1704 transitions. [2023-12-15 21:56:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 21:56:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 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 [2023-12-15 21:56:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:49,578 INFO L225 Difference]: With dead ends: 1317 [2023-12-15 21:56:49,578 INFO L226 Difference]: Without dead ends: 1315 [2023-12-15 21:56:49,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=2329, Unknown=0, NotChecked=0, Total=2862 [2023-12-15 21:56:49,580 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 224 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:49,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 378 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 21:56:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2023-12-15 21:56:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1195. [2023-12-15 21:56:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.297319932998325) internal successors, (1549), 1194 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1549 transitions. [2023-12-15 21:56:49,671 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1549 transitions. Word has length 42 [2023-12-15 21:56:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:49,671 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 1549 transitions. [2023-12-15 21:56:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.2592592592592595) internal successors, (115), 26 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) [2023-12-15 21:56:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1549 transitions. [2023-12-15 21:56:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 21:56:49,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:49,672 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] [2023-12-15 21:56:49,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:49,877 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 [2023-12-15 21:56:49,877 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:49,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2115995138, now seen corresponding path program 1 times [2023-12-15 21:56:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752025312] [2023-12-15 21:56:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 21:56:50,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752025312] [2023-12-15 21:56:50,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752025312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:50,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391409458] [2023-12-15 21:56:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:50,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:50,417 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) [2023-12-15 21:56:50,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 21:56:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:50,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-15 21:56:50,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:50,670 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 [2023-12-15 21:56:50,675 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 [2023-12-15 21:56:50,677 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 [2023-12-15 21:56:50,761 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 [2023-12-15 21:56:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-15 21:56:50,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:50,869 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 [2023-12-15 21:56:50,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 21:56:50,873 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 [2023-12-15 21:56:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-15 21:56:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391409458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:50,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 24 [2023-12-15 21:56:50,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941887669] [2023-12-15 21:56:50,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 21:56:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 21:56:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2023-12-15 21:56:50,916 INFO L87 Difference]: Start difference. First operand 1195 states and 1549 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 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) [2023-12-15 21:56:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:53,177 INFO L93 Difference]: Finished difference Result 2708 states and 3514 transitions. [2023-12-15 21:56:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-15 21:56:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 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 [2023-12-15 21:56:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:53,183 INFO L225 Difference]: With dead ends: 2708 [2023-12-15 21:56:53,183 INFO L226 Difference]: Without dead ends: 1824 [2023-12-15 21:56:53,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=806, Invalid=5674, Unknown=0, NotChecked=0, Total=6480 [2023-12-15 21:56:53,186 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 276 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:53,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 858 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-15 21:56:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2023-12-15 21:56:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1698. [2023-12-15 21:56:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 1.2875662934590453) internal successors, (2185), 1697 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2185 transitions. [2023-12-15 21:56:53,321 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2185 transitions. Word has length 43 [2023-12-15 21:56:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:53,321 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2185 transitions. [2023-12-15 21:56:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 24 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) [2023-12-15 21:56:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2185 transitions. [2023-12-15 21:56:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-15 21:56:53,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:53,321 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] [2023-12-15 21:56:53,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:53,540 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 [2023-12-15 21:56:53,540 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:53,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1777727546, now seen corresponding path program 2 times [2023-12-15 21:56:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131881550] [2023-12-15 21:56:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 21:56:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131881550] [2023-12-15 21:56:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131881550] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731318811] [2023-12-15 21:56:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 21:56:53,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:53,646 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) [2023-12-15 21:56:53,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-15 21:56:53,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 21:56:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:53,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-15 21:56:53,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-15 21:56:53,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:56:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-15 21:56:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731318811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:56:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:56:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2023-12-15 21:56:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133234111] [2023-12-15 21:56:53,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:56:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 21:56:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:56:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 21:56:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-15 21:56:53,888 INFO L87 Difference]: Start difference. First operand 1698 states and 2185 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2023-12-15 21:56:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 21:56:54,145 INFO L93 Difference]: Finished difference Result 3039 states and 3950 transitions. [2023-12-15 21:56:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 21:56:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 45 [2023-12-15 21:56:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 21:56:54,149 INFO L225 Difference]: With dead ends: 3039 [2023-12-15 21:56:54,149 INFO L226 Difference]: Without dead ends: 1708 [2023-12-15 21:56:54,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-15 21:56:54,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:56:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 21:56:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2023-12-15 21:56:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1641. [2023-12-15 21:56:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 1.2676829268292682) internal successors, (2079), 1640 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 21:56:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2079 transitions. [2023-12-15 21:56:54,282 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2079 transitions. Word has length 45 [2023-12-15 21:56:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 21:56:54,282 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 2079 transitions. [2023-12-15 21:56:54,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2023-12-15 21:56:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2079 transitions. [2023-12-15 21:56:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-15 21:56:54,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 21:56:54,282 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] [2023-12-15 21:56:54,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 21:56:54,488 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 [2023-12-15 21:56:54,488 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 21:56:54,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 21:56:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1767275433, now seen corresponding path program 2 times [2023-12-15 21:56:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 21:56:54,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959478073] [2023-12-15 21:56:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 21:56:54,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 21:56:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 21:56:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 21:56:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 21:56:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959478073] [2023-12-15 21:56:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959478073] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 21:56:54,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264195643] [2023-12-15 21:56:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 21:56:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 21:56:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 21:56:54,899 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) [2023-12-15 21:56:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-15 21:56:55,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 21:56:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 21:56:55,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-15 21:56:55,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 21:56:55,129 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 [2023-12-15 21:56:55,133 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 [2023-12-15 21:56:55,135 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 [2023-12-15 21:56:55,195 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 [2023-12-15 21:56:55,200 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 [2023-12-15 21:56:55,206 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 [2023-12-15 21:56:55,209 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 [2023-12-15 21:56:55,216 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-12-15 21:56:55,216 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 [2023-12-15 21:56:55,559 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-15 21:56:55,559 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 [2023-12-15 21:56:55,564 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 [2023-12-15 21:56:55,705 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-12-15 21:56:55,706 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 [2023-12-15 21:56:55,712 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 [2023-12-15 21:56:55,814 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 38 treesize of output 22 [2023-12-15 21:56:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 21:56:55,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 21:57:01,134 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8)) (.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse5 (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (.cse3 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 4))) (and (forall ((v_ArrVal_2203 (Array Int Int))) (or (not (= v_ArrVal_2203 (store .cse0 .cse1 (select v_ArrVal_2203 .cse1)))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store v_ArrVal_2203 .cse2 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2203) (select v_ArrVal_2203 .cse2)) (+ (select .cse3 .cse2) 8)))) .cse4) .cse5) 0))) (forall ((v_ArrVal_2202 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store v_ArrVal_2202 .cse2 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2202) (select .cse0 .cse2)) (+ (select v_ArrVal_2202 .cse2) 8)))) .cse4) .cse5) 0) (not (= v_ArrVal_2202 (store .cse3 .cse1 (select v_ArrVal_2202 .cse1)))))))) is different from false [2023-12-15 21:57:01,679 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse0 (select |c_#memory_$Pointer$#1.offset| .cse2)) (.cse4 (+ 8 .cse5)) (.cse3 (select |c_#memory_$Pointer$#1.base| .cse2)) (.cse1 (+ 4 .cse5))) (and (forall ((v_ArrVal_2202 (Array Int Int))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2202 .cse1)) v_ArrVal_2202)) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse2 v_ArrVal_2202) (select .cse3 .cse4)) (+ (select v_ArrVal_2202 .cse4) 8)) 0))) (forall ((v_ArrVal_2203 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$#1.base| .cse2 v_ArrVal_2203) (select v_ArrVal_2203 .cse4)) (+ (select .cse0 .cse4) 8)) 0) (not (= v_ArrVal_2203 (store .cse3 .cse1 (select v_ArrVal_2203 .cse1))))))))) is different from false [2023-12-15 21:57:03,580 INFO L349 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2023-12-15 21:57:03,581 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 151 treesize of output 141 [2023-12-15 21:57:03,934 INFO L349 Elim1Store]: treesize reduction 137, result has 29.7 percent of original size [2023-12-15 21:57:03,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 137 treesize of output 168 [2023-12-15 21:57:04,110 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2023-12-15 21:57:04,111 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 3 case distinctions, treesize of input 154 treesize of output 160 [2023-12-15 21:57:04,182 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 87 treesize of output 79 [2023-12-15 21:57:04,255 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 9 treesize of output 7 [2023-12-15 21:57:04,426 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 168 treesize of output 152 [2023-12-15 21:57:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2023-12-15 21:57:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264195643] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 21:57:04,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 21:57:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 32 [2023-12-15 21:57:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936067545] [2023-12-15 21:57:04,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 21:57:04,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-15 21:57:04,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 21:57:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-15 21:57:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=735, Unknown=2, NotChecked=114, Total=992 [2023-12-15 21:57:04,894 INFO L87 Difference]: Start difference. First operand 1641 states and 2079 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) Received shutdown request... [2023-12-15 21:57:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 21:57:09,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=267, Invalid=1378, Unknown=3, NotChecked=158, Total=1806 [2023-12-15 21:57:09,725 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-15 21:57:09,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 205 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 4 Unknown, 56 Unchecked, 2.1s Time] [2023-12-15 21:57:09,726 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 21:57:09,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-15 21:57:09,739 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:57:09,750 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 21:57:09,927 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 [2023-12-15 21:57:09,927 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (1641states) and FLOYD_HOARE automaton (currently 13 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. [2023-12-15 21:57:09,939 INFO L445 BasicCegarLoop]: Path program histogram: [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 21:57:09,941 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 21:57:09,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 09:57:09 BoogieIcfgContainer [2023-12-15 21:57:09,942 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 21:57:09,942 INFO L158 Benchmark]: Toolchain (without parser) took 61884.83ms. Allocated memory was 186.6MB in the beginning and 588.3MB in the end (delta: 401.6MB). Free memory was 149.1MB in the beginning and 444.9MB in the end (delta: -295.8MB). Peak memory consumption was 107.1MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,942 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 21:57:09,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.27ms. Allocated memory is still 186.6MB. Free memory was 149.1MB in the beginning and 131.2MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.68ms. Allocated memory is still 186.6MB. Free memory was 131.0MB in the beginning and 128.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,943 INFO L158 Benchmark]: Boogie Preprocessor took 40.31ms. Allocated memory is still 186.6MB. Free memory was 128.9MB in the beginning and 126.0MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,943 INFO L158 Benchmark]: RCFGBuilder took 326.27ms. Allocated memory is still 186.6MB. Free memory was 126.0MB in the beginning and 107.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,943 INFO L158 Benchmark]: TraceAbstraction took 61168.47ms. Allocated memory was 186.6MB in the beginning and 588.3MB in the end (delta: 401.6MB). Free memory was 106.1MB in the beginning and 444.9MB in the end (delta: -338.8MB). Peak memory consumption was 64.1MB. Max. memory is 8.0GB. [2023-12-15 21:57:09,944 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 293.27ms. Allocated memory is still 186.6MB. Free memory was 149.1MB in the beginning and 131.2MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 50.68ms. Allocated memory is still 186.6MB. Free memory was 131.0MB in the beginning and 128.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.31ms. Allocated memory is still 186.6MB. Free memory was 128.9MB in the beginning and 126.0MB in the end (delta: 2.9MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 326.27ms. Allocated memory is still 186.6MB. Free memory was 126.0MB in the beginning and 107.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 61168.47ms. Allocated memory was 186.6MB in the beginning and 588.3MB in the end (delta: 401.6MB). Free memory was 106.1MB in the beginning and 444.9MB in the end (delta: -338.8MB). Peak memory consumption was 64.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 600]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 600). Cancelled while NwaCegarLoop was constructing difference of abstraction (1641states) and FLOYD_HOARE automaton (currently 13 states, 32 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 61.1s, OverallIterations: 24, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 2311 SdHoareTripleChecker+Valid, 9.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2311 mSDsluCounter, 5981 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 233 IncrementalHoareTripleChecker+Unchecked, 5314 mSDsCounter, 188 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7980 IncrementalHoareTripleChecker+Invalid, 8405 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 188 mSolverCounterUnsat, 667 mSDtfsCounter, 7980 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1685 GetRequests, 1058 SyntacticMatches, 2 SemanticMatches, 624 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 27.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1698occurred in iteration=22, InterpolantAutomatonStates: 437, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 1570 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 33.0s InterpolantComputationTime, 1260 NumberOfCodeBlocks, 1254 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1790 ConstructedInterpolants, 135 QuantifiedInterpolants, 34805 SizeOfPredicates, 358 NumberOfNonLiveVariables, 5253 ConjunctsInSsa, 1024 ConjunctsInUnsatCore, 60 InterpolantComputations, 6 PerfectInterpolantSequences, 877/1921 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown