/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/list-simple/dll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 04:42:23,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 04:42:23,511 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 04:42:23,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 04:42:23,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 04:42:23,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 04:42:23,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 04:42:23,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 04:42:23,536 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 04:42:23,539 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 04:42:23,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 04:42:23,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 04:42:23,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 04:42:23,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 04:42:23,541 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 04:42:23,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 04:42:23,541 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 04:42:23,542 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 04:42:23,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 04:42:23,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 04:42:23,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 04:42:23,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 04:42:23,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 04:42:23,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 04:42:23,543 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 04:42:23,544 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 04:42:23,544 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 04:42:23,544 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 04:42:23,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 04:42:23,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 04:42:23,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 04:42:23,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 04:42:23,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 04:42:23,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 04:42:23,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 04:42:23,547 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 04:42:23,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 04:42:23,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 04:42:23,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 04:42:23,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 04:42:23,711 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 04:42:23,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_append_unequal.i [2023-12-16 04:42:24,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 04:42:24,847 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 04:42:24,849 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_unequal.i [2023-12-16 04:42:24,857 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91e0187e/d4a6c22380e24467ae7ce8a50af6102c/FLAGb629bb206 [2023-12-16 04:42:24,869 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91e0187e/d4a6c22380e24467ae7ce8a50af6102c [2023-12-16 04:42:24,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 04:42:24,871 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 04:42:24,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 04:42:24,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 04:42:24,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 04:42:24,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:42:24" (1/1) ... [2023-12-16 04:42:24,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d014ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:24, skipping insertion in model container [2023-12-16 04:42:24,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:42:24" (1/1) ... [2023-12-16 04:42:24,919 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 04:42:25,162 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_unequal.i[24457,24470] [2023-12-16 04:42:25,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 04:42:25,171 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 04:42:25,200 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_append_unequal.i[24457,24470] [2023-12-16 04:42:25,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 04:42:25,219 INFO L206 MainTranslator]: Completed translation [2023-12-16 04:42:25,220 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25 WrapperNode [2023-12-16 04:42:25,220 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 04:42:25,221 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 04:42:25,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 04:42:25,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 04:42:25,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,256 INFO L138 Inliner]: procedures = 127, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2023-12-16 04:42:25,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 04:42:25,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 04:42:25,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 04:42:25,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 04:42:25,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,283 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 16, 6]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 9 writes are split as follows [0, 8, 1]. [2023-12-16 04:42:25,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,301 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 04:42:25,302 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 04:42:25,302 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 04:42:25,302 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 04:42:25,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (1/1) ... [2023-12-16 04:42:25,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 04:42:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:42:25,347 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) [2023-12-16 04:42:25,365 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 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 04:42:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-12-16 04:42:25,388 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 04:42:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 04:42:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 04:42:25,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 04:42:25,485 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 04:42:25,486 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 04:42:25,774 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 04:42:25,804 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 04:42:25,804 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-16 04:42:25,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:42:25 BoogieIcfgContainer [2023-12-16 04:42:25,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 04:42:25,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 04:42:25,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 04:42:25,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 04:42:25,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:42:24" (1/3) ... [2023-12-16 04:42:25,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9937b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:42:25, skipping insertion in model container [2023-12-16 04:42:25,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:42:25" (2/3) ... [2023-12-16 04:42:25,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9937b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:42:25, skipping insertion in model container [2023-12-16 04:42:25,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:42:25" (3/3) ... [2023-12-16 04:42:25,811 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2023-12-16 04:42:25,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 04:42:25,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 04:42:25,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 04:42:25,861 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;@9dcdad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 04:42:25,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 04:42:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:42:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-16 04:42:25,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:25,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:25,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:25,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 677653752, now seen corresponding path program 1 times [2023-12-16 04:42:25,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:25,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645800420] [2023-12-16 04:42:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 04:42:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:42:26,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:26,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645800420] [2023-12-16 04:42:26,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645800420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:42:26,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:42:26,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 04:42:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409706730] [2023-12-16 04:42:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:42:26,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 04:42:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 04:42:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:42:26,084 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 04:42:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:26,139 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2023-12-16 04:42:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 04:42:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-16 04:42:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:26,146 INFO L225 Difference]: With dead ends: 56 [2023-12-16 04:42:26,146 INFO L226 Difference]: Without dead ends: 26 [2023-12-16 04:42:26,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:42:26,153 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:26,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:42:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-16 04:42:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-16 04:42:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:42:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-12-16 04:42:26,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2023-12-16 04:42:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:26,179 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-12-16 04:42:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 04:42:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-12-16 04:42:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-16 04:42:26,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:26,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:26,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 04:42:26,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:26,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1000421595, now seen corresponding path program 1 times [2023-12-16 04:42:26,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699545020] [2023-12-16 04:42:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:26,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-16 04:42:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:42:26,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:26,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699545020] [2023-12-16 04:42:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699545020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:42:26,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:42:26,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 04:42:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667102764] [2023-12-16 04:42:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:42:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 04:42:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 04:42:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 04:42:26,374 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 04:42:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:26,420 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-12-16 04:42:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 04:42:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-16 04:42:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:26,422 INFO L225 Difference]: With dead ends: 51 [2023-12-16 04:42:26,422 INFO L226 Difference]: Without dead ends: 31 [2023-12-16 04:42:26,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 04:42:26,423 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:26,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:42:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-16 04:42:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-12-16 04:42:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:42:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2023-12-16 04:42:26,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 13 [2023-12-16 04:42:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:26,429 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2023-12-16 04:42:26,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 04:42:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2023-12-16 04:42:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-16 04:42:26,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:26,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 04:42:26,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -538017187, now seen corresponding path program 1 times [2023-12-16 04:42:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:26,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534359858] [2023-12-16 04:42:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:42:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-16 04:42:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:26,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:26,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534359858] [2023-12-16 04:42:26,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534359858] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:42:26,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:42:26,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 04:42:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261024695] [2023-12-16 04:42:26,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:42:26,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 04:42:26,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 04:42:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 04:42:26,608 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:42:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:26,655 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2023-12-16 04:42:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 04:42:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-16 04:42:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:26,657 INFO L225 Difference]: With dead ends: 56 [2023-12-16 04:42:26,657 INFO L226 Difference]: Without dead ends: 31 [2023-12-16 04:42:26,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 04:42:26,658 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:26,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:42:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-16 04:42:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-12-16 04:42:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:42:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-12-16 04:42:26,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2023-12-16 04:42:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:26,662 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-12-16 04:42:26,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:42:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-12-16 04:42:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-16 04:42:26,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:26,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:26,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 04:42:26,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:26,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1549134437, now seen corresponding path program 1 times [2023-12-16 04:42:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:26,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899866964] [2023-12-16 04:42:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:26,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:42:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-16 04:42:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:26,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899866964] [2023-12-16 04:42:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899866964] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144455003] [2023-12-16 04:42:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:42:26,815 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) [2023-12-16 04:42:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 04:42:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:26,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-16 04:42:26,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:42:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:42:26,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:42:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:27,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144455003] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:42:27,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:42:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-12-16 04:42:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567185996] [2023-12-16 04:42:27,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:42:27,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 04:42:27,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 04:42:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-16 04:42:27,031 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 04:42:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:27,078 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-12-16 04:42:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 04:42:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-12-16 04:42:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:27,080 INFO L225 Difference]: With dead ends: 52 [2023-12-16 04:42:27,080 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 04:42:27,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-16 04:42:27,085 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:27,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 70 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:42:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 04:42:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-16 04:42:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:42:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-16 04:42:27,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 21 [2023-12-16 04:42:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:27,099 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-16 04:42:27,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 04:42:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-16 04:42:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-16 04:42:27,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:27,101 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:27,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 04:42:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:27,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1972828883, now seen corresponding path program 1 times [2023-12-16 04:42:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353764558] [2023-12-16 04:42:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:27,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:42:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:42:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:42:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-16 04:42:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353764558] [2023-12-16 04:42:27,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353764558] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992360809] [2023-12-16 04:42:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:42:27,640 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) [2023-12-16 04:42:27,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 04:42:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:27,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-16 04:42:27,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:42:28,006 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 [2023-12-16 04:42:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:28,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:42:28,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-12-16 04:42:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-16 04:42:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992360809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:42:28,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:42:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 18 [2023-12-16 04:42:28,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994239217] [2023-12-16 04:42:28,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:42:28,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 04:42:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 04:42:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-12-16 04:42:28,130 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 04:42:32,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:36,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:40,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:44,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:48,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:52,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 04:42:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:52,613 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2023-12-16 04:42:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-16 04:42:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 29 [2023-12-16 04:42:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:52,615 INFO L225 Difference]: With dead ends: 60 [2023-12-16 04:42:52,615 INFO L226 Difference]: Without dead ends: 35 [2023-12-16 04:42:52,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-12-16 04:42:52,616 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:52,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 283 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 6 Unknown, 0 Unchecked, 24.3s Time] [2023-12-16 04:42:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-16 04:42:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-16 04:42:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:42:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-12-16 04:42:52,625 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 29 [2023-12-16 04:42:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-12-16 04:42:52,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-16 04:42:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-12-16 04:42:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-16 04:42:52,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:52,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:52,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 04:42:52,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:52,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:52,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1432775987, now seen corresponding path program 1 times [2023-12-16 04:42:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:52,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763611040] [2023-12-16 04:42:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:52,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:53,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:42:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:53,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:42:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:53,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:42:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:53,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:53,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763611040] [2023-12-16 04:42:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763611040] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524234323] [2023-12-16 04:42:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:53,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:42:53,828 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) [2023-12-16 04:42:53,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 04:42:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:53,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-16 04:42:53,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:42:53,998 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 6 treesize of output 5 [2023-12-16 04:42:54,105 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-16 04:42:54,106 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-16 04:42:54,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-16 04:42:54,191 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-16 04:42:54,191 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 1 case distinctions, treesize of input 52 treesize of output 49 [2023-12-16 04:42:54,321 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 60 treesize of output 18 [2023-12-16 04:42:54,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 7 [2023-12-16 04:42:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 04:42:54,392 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 68 treesize of output 51 [2023-12-16 04:42:54,405 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-12-16 04:42:54,405 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 2 case distinctions, treesize of input 34 treesize of output 36 [2023-12-16 04:42:54,603 INFO L349 Elim1Store]: treesize reduction 53, result has 39.8 percent of original size [2023-12-16 04:42:54,603 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 86 treesize of output 71 [2023-12-16 04:42:54,608 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 67 treesize of output 50 [2023-12-16 04:42:54,642 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 58 treesize of output 42 [2023-12-16 04:42:54,644 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 42 treesize of output 30 [2023-12-16 04:42:54,645 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 12 [2023-12-16 04:42:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:42:54,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:42:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524234323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:55,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 04:42:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 36 [2023-12-16 04:42:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592485065] [2023-12-16 04:42:55,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 04:42:55,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-16 04:42:55,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-16 04:42:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1596, Unknown=3, NotChecked=0, Total=1722 [2023-12-16 04:42:55,034 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 36 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 04:42:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:42:55,963 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-12-16 04:42:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 04:42:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2023-12-16 04:42:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:42:55,964 INFO L225 Difference]: With dead ends: 52 [2023-12-16 04:42:55,964 INFO L226 Difference]: Without dead ends: 41 [2023-12-16 04:42:55,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=2911, Unknown=3, NotChecked=0, Total=3192 [2023-12-16 04:42:55,965 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 04:42:55,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 402 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 04:42:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-16 04:42:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-12-16 04:42:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:42:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-16 04:42:55,970 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 32 [2023-12-16 04:42:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:42:55,970 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-16 04:42:55,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 04:42:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-16 04:42:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-16 04:42:55,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:42:55,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:42:55,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 04:42:56,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:56,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:42:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:42:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 95133706, now seen corresponding path program 1 times [2023-12-16 04:42:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:42:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065854275] [2023-12-16 04:42:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:42:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:57,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:42:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:57,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:42:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:57,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:42:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:42:57,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:42:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065854275] [2023-12-16 04:42:57,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065854275] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719030048] [2023-12-16 04:42:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:42:57,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:42:57,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:42:57,591 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) [2023-12-16 04:42:57,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 04:42:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:42:57,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-16 04:42:57,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:42:57,926 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 6 treesize of output 5 [2023-12-16 04:42:58,178 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-16 04:42:58,178 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 17 treesize of output 21 [2023-12-16 04:42:58,228 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 22 treesize of output 7 [2023-12-16 04:42:58,232 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 13 treesize of output 9 [2023-12-16 04:42:58,286 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-16 04:42:58,286 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 1 case distinctions, treesize of input 62 treesize of output 57 [2023-12-16 04:42:58,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 11 [2023-12-16 04:42:58,473 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 42 treesize of output 14 [2023-12-16 04:42:58,476 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 15 treesize of output 3 [2023-12-16 04:42:58,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 04:42:58,584 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-12-16 04:42:58,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2023-12-16 04:42:58,611 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (let ((.cse3 (select (select |c_#memory_$Pointer$#1.base| .cse0) (+ .cse1 4)))) (and (= |c_ULTIMATE.start_dll_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse0)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (= (select (select |c_#memory_int#1| .cse0) .cse1) 1) (exists ((|v_old(#memory_int#1)_AFTER_CALL_11| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_int#1)_AFTER_CALL_11| |c_#memory_int#1|))) (and (= .cse2 |c_ULTIMATE.start_dll_append_#t~ret7#1.base|) (= |c_#memory_int#1| (store |v_old(#memory_int#1)_AFTER_CALL_11| .cse2 (select |c_#memory_int#1| .cse2))) (= (select (select |v_old(#memory_int#1)_AFTER_CALL_11| .cse0) .cse1) 1))))) (not (= .cse3 .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse3)) (= |c_ULTIMATE.start_dll_append_~head#1.offset| 0)))) is different from false [2023-12-16 04:42:58,613 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) 0)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) 0))) (let ((.cse3 (select (select |c_#memory_$Pointer$#1.base| .cse0) (+ .cse1 4)))) (and (= |c_ULTIMATE.start_dll_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse0)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (= (select (select |c_#memory_int#1| .cse0) .cse1) 1) (exists ((|v_old(#memory_int#1)_AFTER_CALL_11| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_int#1)_AFTER_CALL_11| |c_#memory_int#1|))) (and (= .cse2 |c_ULTIMATE.start_dll_append_#t~ret7#1.base|) (= |c_#memory_int#1| (store |v_old(#memory_int#1)_AFTER_CALL_11| .cse2 (select |c_#memory_int#1| .cse2))) (= (select (select |v_old(#memory_int#1)_AFTER_CALL_11| .cse0) .cse1) 1))))) (not (= .cse3 .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse3)) (= |c_ULTIMATE.start_dll_append_~head#1.offset| 0)))) is different from true [2023-12-16 04:42:58,763 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 58 treesize of output 16 [2023-12-16 04:42:58,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2023-12-16 04:42:58,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-16 04:42:58,883 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 [2023-12-16 04:42:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:42:58,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:42:58,964 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1001 (Array Int Int)) (v_ArrVal_1000 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1000) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1001) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-12-16 04:42:58,978 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1001 (Array Int Int)) (v_ArrVal_1000 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4)) v_ArrVal_1000) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1001) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-12-16 04:42:59,045 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1001 (Array Int Int)) (v_ArrVal_1000 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4)) v_ArrVal_1000) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1001) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-12-16 04:42:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719030048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:42:59,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 04:42:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 45 [2023-12-16 04:42:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787284121] [2023-12-16 04:42:59,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 04:42:59,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-16 04:42:59,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:42:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-16 04:42:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1914, Unknown=24, NotChecked=364, Total=2450 [2023-12-16 04:42:59,134 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 45 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 04:42:59,666 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse7 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse2 (select .cse7 0)) (.cse4 (select .cse6 0))) (let ((.cse1 (= (select (select |c_#memory_int#1| .cse2) .cse4) 1)) (.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse2) (+ .cse4 4))) (.cse5 (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (= (select |c_#valid| .cse0) 1) (= |c_ULTIMATE.start_dll_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) .cse1 (= (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 0) (= (select |c_#valid| .cse2) 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse2)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or .cse1 (exists ((|v_old(#memory_int#1)_AFTER_CALL_11| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_old(#memory_int#1)_AFTER_CALL_11| |c_#memory_int#1|))) (and (= .cse3 |c_ULTIMATE.start_dll_append_#t~ret7#1.base|) (= |c_#memory_int#1| (store |v_old(#memory_int#1)_AFTER_CALL_11| .cse3 (select |c_#memory_int#1| .cse3))) (= (select (select |v_old(#memory_int#1)_AFTER_CALL_11| .cse2) .cse4) 1))))) (= |c_ULTIMATE.start_dll_append_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (= (select |c_#valid| .cse5) 1) (not (= .cse0 .cse2)) (= |c_ULTIMATE.start_main_~data~0#1| 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse5)) (not (= (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) 4) .cse5)) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select |c_#memory_int#1| .cse5) (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= |c_ULTIMATE.start_dll_append_~head#1.offset| 0))))) is different from false [2023-12-16 04:42:59,674 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse7 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse2 (select .cse7 0)) (.cse4 (select .cse6 0))) (let ((.cse1 (= (select (select |c_#memory_int#1| .cse2) .cse4) 1)) (.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse2) (+ .cse4 4))) (.cse5 (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (= (select |c_#valid| .cse0) 1) (= |c_ULTIMATE.start_dll_append_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) .cse1 (= (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 0) (= (select |c_#valid| .cse2) 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse2)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or .cse1 (exists ((|v_old(#memory_int#1)_AFTER_CALL_11| (Array Int (Array Int Int)))) (let ((.cse3 (@diff |v_old(#memory_int#1)_AFTER_CALL_11| |c_#memory_int#1|))) (and (= .cse3 |c_ULTIMATE.start_dll_append_#t~ret7#1.base|) (= |c_#memory_int#1| (store |v_old(#memory_int#1)_AFTER_CALL_11| .cse3 (select |c_#memory_int#1| .cse3))) (= (select (select |v_old(#memory_int#1)_AFTER_CALL_11| .cse2) .cse4) 1))))) (= |c_ULTIMATE.start_dll_append_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (= (select |c_#valid| .cse5) 1) (not (= .cse0 .cse2)) (= |c_ULTIMATE.start_main_~data~0#1| 1) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse5)) (not (= (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) 4) .cse5)) (not (= |c_ULTIMATE.start_dll_append_#t~ret7#1.base| .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select |c_#memory_int#1| .cse5) (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= |c_ULTIMATE.start_dll_append_~head#1.offset| 0))))) is different from true [2023-12-16 04:43:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:43:00,154 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-12-16 04:43:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 04:43:00,154 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-12-16 04:43:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:43:00,156 INFO L225 Difference]: With dead ends: 64 [2023-12-16 04:43:00,156 INFO L226 Difference]: Without dead ends: 62 [2023-12-16 04:43:00,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=3142, Unknown=26, NotChecked=590, Total=4032 [2023-12-16 04:43:00,175 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 04:43:00,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 402 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 832 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2023-12-16 04:43:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-16 04:43:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2023-12-16 04:43:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:43:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-12-16 04:43:00,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 36 [2023-12-16 04:43:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:43:00,191 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-12-16 04:43:00,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 04:43:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-12-16 04:43:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-16 04:43:00,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:43:00,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:43:00,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-16 04:43:00,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:43:00,402 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:43:00,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:43:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1345876902, now seen corresponding path program 1 times [2023-12-16 04:43:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:43:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354944328] [2023-12-16 04:43:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:43:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:43:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:43:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:43:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:00,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:43:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-16 04:43:00,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:43:00,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354944328] [2023-12-16 04:43:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354944328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:43:00,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:43:00,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-16 04:43:00,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476272270] [2023-12-16 04:43:00,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:43:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 04:43:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:43:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 04:43:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-16 04:43:00,534 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-16 04:43:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:43:00,587 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2023-12-16 04:43:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 04:43:00,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-16 04:43:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:43:00,588 INFO L225 Difference]: With dead ends: 55 [2023-12-16 04:43:00,588 INFO L226 Difference]: Without dead ends: 50 [2023-12-16 04:43:00,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-16 04:43:00,589 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:43:00,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:43:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-16 04:43:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2023-12-16 04:43:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:43:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-12-16 04:43:00,594 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 37 [2023-12-16 04:43:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:43:00,594 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-12-16 04:43:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-16 04:43:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-12-16 04:43:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 04:43:00,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:43:00,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:43:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-16 04:43:00,596 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:43:00,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:43:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1515299867, now seen corresponding path program 2 times [2023-12-16 04:43:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:43:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20742290] [2023-12-16 04:43:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:43:00,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:43:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:43:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:43:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:02,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:43:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:43:02,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:43:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20742290] [2023-12-16 04:43:02,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20742290] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:43:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553092806] [2023-12-16 04:43:02,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 04:43:02,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:43:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:43:02,229 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) [2023-12-16 04:43:02,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 04:43:02,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 04:43:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:43:02,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 135 conjunts are in the unsatisfiable core [2023-12-16 04:43:02,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:43:02,519 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 6 treesize of output 5 [2023-12-16 04:43:02,584 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 [2023-12-16 04:43:02,589 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 [2023-12-16 04:43:02,758 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-16 04:43:02,758 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 17 treesize of output 21 [2023-12-16 04:43:02,764 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 16 treesize of output 11 [2023-12-16 04:43:02,768 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 16 treesize of output 11 [2023-12-16 04:43:02,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-12-16 04:43:02,826 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 16 treesize of output 11 [2023-12-16 04:43:02,835 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 17 treesize of output 19 [2023-12-16 04:43:02,839 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 8 treesize of output 7 [2023-12-16 04:43:02,896 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-16 04:43:02,897 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 78 treesize of output 55 [2023-12-16 04:43:02,903 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 38 treesize of output 36 [2023-12-16 04:43:03,144 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-16 04:43:03,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 41 [2023-12-16 04:43:03,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 04:43:03,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 26 treesize of output 10 [2023-12-16 04:43:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 04:43:03,333 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-16 04:43:03,334 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 102 treesize of output 69 [2023-12-16 04:43:03,361 INFO L349 Elim1Store]: treesize reduction 48, result has 47.3 percent of original size [2023-12-16 04:43:03,361 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 2 case distinctions, treesize of input 50 treesize of output 58 [2023-12-16 04:43:03,389 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-12-16 04:43:03,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-12-16 04:43:03,605 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-16 04:43:03,605 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 15 treesize of output 7 [2023-12-16 04:43:03,767 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2023-12-16 04:43:03,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 45 [2023-12-16 04:43:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:43:03,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:43:04,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553092806] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:43:04,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 04:43:04,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-12-16 04:43:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211010949] [2023-12-16 04:43:04,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 04:43:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-16 04:43:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:43:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-16 04:43:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2108, Unknown=0, NotChecked=0, Total=2256 [2023-12-16 04:43:04,155 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 43 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 04:43:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:43:05,248 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2023-12-16 04:43:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 04:43:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-12-16 04:43:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:43:05,249 INFO L225 Difference]: With dead ends: 81 [2023-12-16 04:43:05,249 INFO L226 Difference]: Without dead ends: 66 [2023-12-16 04:43:05,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2023-12-16 04:43:05,251 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 04:43:05,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 379 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 04:43:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-16 04:43:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-12-16 04:43:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 04:43:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-12-16 04:43:05,257 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 38 [2023-12-16 04:43:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:43:05,257 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-12-16 04:43:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 04:43:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-12-16 04:43:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-16 04:43:05,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:43:05,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:43:05,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 04:43:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:43:05,466 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:43:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:43:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -549522398, now seen corresponding path program 1 times [2023-12-16 04:43:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:43:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235355820] [2023-12-16 04:43:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:43:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:43:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:07,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-16 04:43:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-16 04:43:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-16 04:43:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-16 04:43:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:43:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235355820] [2023-12-16 04:43:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235355820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:43:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239162024] [2023-12-16 04:43:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:43:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:43:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:43:07,550 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) [2023-12-16 04:43:07,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 04:43:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:43:07,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 161 conjunts are in the unsatisfiable core [2023-12-16 04:43:07,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:43:07,796 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 6 treesize of output 5 [2023-12-16 04:43:07,924 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 11 treesize of output 7 [2023-12-16 04:43:07,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-16 04:43:07,936 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 11 treesize of output 7 [2023-12-16 04:43:08,238 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-16 04:43:08,238 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 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-16 04:43:08,257 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-16 04:43:08,258 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-16 04:43:08,265 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 16 treesize of output 11 [2023-12-16 04:43:08,275 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 16 treesize of output 11 [2023-12-16 04:43:08,343 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 16 treesize of output 11 [2023-12-16 04:43:08,355 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 0 case distinctions, treesize of input 11 treesize of output 14 [2023-12-16 04:43:08,361 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 16 treesize of output 11 [2023-12-16 04:43:08,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 11 treesize of output 14 [2023-12-16 04:43:08,370 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 16 treesize of output 11 [2023-12-16 04:43:08,451 INFO L349 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2023-12-16 04:43:08,451 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 150 treesize of output 83 [2023-12-16 04:43:08,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-16 04:43:08,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 17 [2023-12-16 04:43:08,750 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-16 04:43:08,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 56 [2023-12-16 04:43:08,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2023-12-16 04:43:08,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 7 [2023-12-16 04:43:08,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-12-16 04:43:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-16 04:43:08,916 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-16 04:43:08,916 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 181 treesize of output 130 [2023-12-16 04:43:08,937 INFO L349 Elim1Store]: treesize reduction 41, result has 47.4 percent of original size [2023-12-16 04:43:08,937 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 1 case distinctions, treesize of input 30 treesize of output 43 [2023-12-16 04:43:08,969 INFO L349 Elim1Store]: treesize reduction 60, result has 47.8 percent of original size [2023-12-16 04:43:08,969 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 2 case distinctions, treesize of input 72 treesize of output 80 [2023-12-16 04:43:08,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 04:43:08,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-12-16 04:43:09,019 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2023-12-16 04:43:09,020 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 2 case distinctions, treesize of input 34 treesize of output 36 [2023-12-16 04:43:09,747 INFO L349 Elim1Store]: treesize reduction 230, result has 35.6 percent of original size [2023-12-16 04:43:09,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 151 treesize of output 205 [2023-12-16 04:43:09,822 INFO L349 Elim1Store]: treesize reduction 141, result has 35.9 percent of original size [2023-12-16 04:43:09,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 249 treesize of output 177 [2023-12-16 04:43:09,852 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-12-16 04:43:09,852 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 308 treesize of output 227 [2023-12-16 04:43:09,889 INFO L349 Elim1Store]: treesize reduction 92, result has 22.7 percent of original size [2023-12-16 04:43:09,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 122 treesize of output 126 [2023-12-16 04:43:09,913 INFO L349 Elim1Store]: treesize reduction 45, result has 48.9 percent of original size [2023-12-16 04:43:09,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 62 [2023-12-16 04:43:09,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2023-12-16 04:43:11,129 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 3 [2023-12-16 04:43:11,138 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 3 [2023-12-16 04:43:11,146 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 3 [2023-12-16 04:43:11,164 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 3 [2023-12-16 04:43:11,173 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 3 [2023-12-16 04:43:11,180 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 3 [2023-12-16 04:43:11,213 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 3 [2023-12-16 04:43:11,232 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 3 [2023-12-16 04:43:11,245 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 3 [2023-12-16 04:43:11,261 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 3 [2023-12-16 04:43:11,279 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 3 [2023-12-16 04:43:11,285 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 3 [2023-12-16 04:43:11,322 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:11,330 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:11,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-16 04:43:12,004 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 33 treesize of output 21 [2023-12-16 04:43:12,092 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:12,107 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:12,126 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 34 treesize of output 22 [2023-12-16 04:43:12,142 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 26 treesize of output 18 [2023-12-16 04:43:12,159 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 26 treesize of output 18 [2023-12-16 04:43:12,230 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 26 treesize of output 18 [2023-12-16 04:43:12,252 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 34 treesize of output 22 [2023-12-16 04:43:12,271 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 26 treesize of output 18 [2023-12-16 04:43:13,824 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:13,862 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-16 04:43:14,796 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 262 treesize of output 210 [2023-12-16 04:43:14,799 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 214 treesize of output 158 [2023-12-16 04:43:15,468 INFO L349 Elim1Store]: treesize reduction 24, result has 90.4 percent of original size [2023-12-16 04:43:15,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 372 [2023-12-16 04:43:15,850 INFO L349 Elim1Store]: treesize reduction 36, result has 91.1 percent of original size [2023-12-16 04:43:15,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 50 case distinctions, treesize of input 143 treesize of output 459 Received shutdown request... [2023-12-16 04:43:33,571 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 04:43:33,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-16 04:43:33,596 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 [2023-12-16 04:43:33,596 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 04:43:33,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:43:33,777 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 40 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-51-8-4-8-7-9-5-10-4-10-5-8-3-7-3-7-2-5-1 context. [2023-12-16 04:43:33,780 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:43:33,782 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 04:43:33,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 04:43:33 BoogieIcfgContainer [2023-12-16 04:43:33,784 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 04:43:33,786 INFO L158 Benchmark]: Toolchain (without parser) took 68914.39ms. Allocated memory was 200.3MB in the beginning and 805.3MB in the end (delta: 605.0MB). Free memory was 136.3MB in the beginning and 450.4MB in the end (delta: -314.1MB). Peak memory consumption was 463.6MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,786 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 04:43:33,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.60ms. Allocated memory is still 200.3MB. Free memory was 136.3MB in the beginning and 117.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,787 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.15ms. Allocated memory is still 200.3MB. Free memory was 117.7MB in the beginning and 115.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,788 INFO L158 Benchmark]: Boogie Preprocessor took 44.41ms. Allocated memory is still 200.3MB. Free memory was 115.6MB in the beginning and 112.5MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,788 INFO L158 Benchmark]: RCFGBuilder took 502.85ms. Allocated memory was 200.3MB in the beginning and 245.4MB in the end (delta: 45.1MB). Free memory was 112.5MB in the beginning and 206.5MB in the end (delta: -94.0MB). Peak memory consumption was 21.5MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,788 INFO L158 Benchmark]: TraceAbstraction took 67979.20ms. Allocated memory was 245.4MB in the beginning and 805.3MB in the end (delta: 559.9MB). Free memory was 205.9MB in the beginning and 450.4MB in the end (delta: -244.4MB). Peak memory consumption was 487.2MB. Max. memory is 8.0GB. [2023-12-16 04:43:33,791 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 346.60ms. Allocated memory is still 200.3MB. Free memory was 136.3MB in the beginning and 117.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.15ms. Allocated memory is still 200.3MB. Free memory was 117.7MB in the beginning and 115.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.41ms. Allocated memory is still 200.3MB. Free memory was 115.6MB in the beginning and 112.5MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 502.85ms. Allocated memory was 200.3MB in the beginning and 245.4MB in the end (delta: 45.1MB). Free memory was 112.5MB in the beginning and 206.5MB in the end (delta: -94.0MB). Peak memory consumption was 21.5MB. Max. memory is 8.0GB. * TraceAbstraction took 67979.20ms. Allocated memory was 245.4MB in the beginning and 805.3MB in the end (delta: 559.9MB). Free memory was 205.9MB in the beginning and 450.4MB in the end (delta: -244.4MB). Peak memory consumption was 487.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 645]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 645). Cancelled while NwaCegarLoop was analyzing trace of length 40 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-6-1 term,while PolyPacSimplificationTermWalker was simplifying 6 xjuncts wrt. a ∧-51-8-4-8-7-9-5-10-4-10-5-8-3-7-3-7-2-5-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.9s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 27.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 25.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 207 mSDsluCounter, 1832 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 110 IncrementalHoareTripleChecker+Unchecked, 1607 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2626 IncrementalHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 225 mSDtfsCounter, 2626 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 414 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 217 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=9, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 396 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 430 ConstructedInterpolants, 9 QuantifiedInterpolants, 5859 SizeOfPredicates, 73 NumberOfNonLiveVariables, 1883 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 118/194 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