./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/verifythis/duplets.c --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/verifythis/duplets.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 20:59:03,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 20:59:03,995 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 20:59:03,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 20:59:04,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 20:59:04,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 20:59:04,037 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 20:59:04,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 20:59:04,038 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 20:59:04,039 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 20:59:04,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 20:59:04,039 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 20:59:04,040 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 20:59:04,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 20:59:04,041 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 20:59:04,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 20:59:04,041 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 20:59:04,042 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 20:59:04,042 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 20:59:04,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 20:59:04,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 20:59:04,048 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 20:59:04,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 20:59:04,049 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 20:59:04,049 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 20:59:04,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 20:59:04,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 20:59:04,050 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 20:59:04,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 20:59:04,050 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 20:59:04,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 20:59:04,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 20:59:04,051 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 20:59:04,051 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 20:59:04,051 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 20:59:04,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 20:59:04,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 20:59:04,052 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 20:59:04,052 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 20:59:04,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 20:59:04,053 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 20:59:04,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 20:59:04,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 20:59:04,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 20:59:04,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 20:59:04,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 20:59:04,320 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 20:59:04,321 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 20:59:04,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2023-11-22 20:59:05,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 20:59:05,698 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 20:59:05,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2023-11-22 20:59:05,704 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36a1e6d1/e221e31bad1e45d78065cb1df83eac2c/FLAGc9840f821 [2023-11-22 20:59:05,716 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36a1e6d1/e221e31bad1e45d78065cb1df83eac2c [2023-11-22 20:59:05,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 20:59:05,720 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 20:59:05,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 20:59:05,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 20:59:05,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 20:59:05,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2064ae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05, skipping insertion in model container [2023-11-22 20:59:05,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,747 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 20:59:05,871 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2023-11-22 20:59:05,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 20:59:05,906 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 20:59:05,917 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2023-11-22 20:59:05,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 20:59:05,937 INFO L206 MainTranslator]: Completed translation [2023-11-22 20:59:05,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05 WrapperNode [2023-11-22 20:59:05,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 20:59:05,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 20:59:05,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 20:59:05,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 20:59:05,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,973 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2023-11-22 20:59:05,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 20:59:05,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 20:59:05,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 20:59:05,975 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 20:59:05,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:05,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:06,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:06,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:06,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:06,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 20:59:06,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 20:59:06,018 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 20:59:06,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 20:59:06,019 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (1/1) ... [2023-11-22 20:59:06,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 20:59:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:06,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 20:59:06,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 20:59:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 20:59:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-22 20:59:06,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-22 20:59:06,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 20:59:06,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 20:59:06,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 20:59:06,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 20:59:06,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 20:59:06,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 20:59:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 20:59:06,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 20:59:06,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 20:59:06,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 20:59:06,219 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 20:59:06,221 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 20:59:06,473 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 20:59:06,507 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 20:59:06,507 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 20:59:06,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:59:06 BoogieIcfgContainer [2023-11-22 20:59:06,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 20:59:06,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 20:59:06,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 20:59:06,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 20:59:06,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 08:59:05" (1/3) ... [2023-11-22 20:59:06,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564e15de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:59:06, skipping insertion in model container [2023-11-22 20:59:06,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 08:59:05" (2/3) ... [2023-11-22 20:59:06,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564e15de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 08:59:06, skipping insertion in model container [2023-11-22 20:59:06,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 08:59:06" (3/3) ... [2023-11-22 20:59:06,516 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2023-11-22 20:59:06,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 20:59:06,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 20:59:06,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 20:59:06,584 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;@7aad813d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 20:59:06,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 20:59:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 20:59:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 20:59:06,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:06,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:06,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:06,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1427921322, now seen corresponding path program 1 times [2023-11-22 20:59:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220255525] [2023-11-22 20:59:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:06,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:06,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:06,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:06,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:06,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:06,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220255525] [2023-11-22 20:59:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220255525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:06,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 20:59:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315614680] [2023-11-22 20:59:06,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:06,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 20:59:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 20:59:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 20:59:06,825 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 20:59:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:06,862 INFO L93 Difference]: Finished difference Result 70 states and 108 transitions. [2023-11-22 20:59:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 20:59:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-11-22 20:59:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:06,871 INFO L225 Difference]: With dead ends: 70 [2023-11-22 20:59:06,871 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 20:59:06,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 20:59:06,878 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:06,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 20:59:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 20:59:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-22 20:59:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 20:59:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-11-22 20:59:06,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 30 [2023-11-22 20:59:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:06,922 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-11-22 20:59:06,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-22 20:59:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-11-22 20:59:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 20:59:06,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:06,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:06,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 20:59:06,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:06,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash 598004762, now seen corresponding path program 1 times [2023-11-22 20:59:06,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:06,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321091364] [2023-11-22 20:59:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:06,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321091364] [2023-11-22 20:59:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321091364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:07,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075242694] [2023-11-22 20:59:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:07,510 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) [2023-11-22 20:59:07,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 20:59:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:07,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-22 20:59:07,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:07,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075242694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 20:59:07,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 20:59:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-22 20:59:07,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140542472] [2023-11-22 20:59:07,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:07,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 20:59:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 20:59:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-22 20:59:07,916 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 20:59:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:08,075 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2023-11-22 20:59:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 20:59:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2023-11-22 20:59:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:08,078 INFO L225 Difference]: With dead ends: 59 [2023-11-22 20:59:08,078 INFO L226 Difference]: Without dead ends: 40 [2023-11-22 20:59:08,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-22 20:59:08,081 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:08,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 193 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-22 20:59:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-22 20:59:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 20:59:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2023-11-22 20:59:08,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 30 [2023-11-22 20:59:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:08,101 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2023-11-22 20:59:08,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 20:59:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2023-11-22 20:59:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-22 20:59:08,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:08,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:08,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:08,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:08,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash -327019314, now seen corresponding path program 1 times [2023-11-22 20:59:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:08,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791465223] [2023-11-22 20:59:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791465223] [2023-11-22 20:59:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791465223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 20:59:08,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483361775] [2023-11-22 20:59:08,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 20:59:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 20:59:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-22 20:59:08,420 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:08,471 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-22 20:59:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 20:59:08,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-22 20:59:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:08,473 INFO L225 Difference]: With dead ends: 53 [2023-11-22 20:59:08,473 INFO L226 Difference]: Without dead ends: 51 [2023-11-22 20:59:08,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 20:59:08,474 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:08,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 20:59:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-22 20:59:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2023-11-22 20:59:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 20:59:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2023-11-22 20:59:08,482 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 31 [2023-11-22 20:59:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:08,483 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2023-11-22 20:59:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2023-11-22 20:59:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-22 20:59:08,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:08,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:08,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 20:59:08,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:08,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -125149557, now seen corresponding path program 1 times [2023-11-22 20:59:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:08,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070197789] [2023-11-22 20:59:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070197789] [2023-11-22 20:59:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070197789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:08,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:08,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-22 20:59:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22676220] [2023-11-22 20:59:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-22 20:59:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-22 20:59:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-22 20:59:08,978 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 20:59:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:09,184 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2023-11-22 20:59:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 20:59:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2023-11-22 20:59:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:09,188 INFO L225 Difference]: With dead ends: 75 [2023-11-22 20:59:09,188 INFO L226 Difference]: Without dead ends: 46 [2023-11-22 20:59:09,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-22 20:59:09,190 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 226 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-22 20:59:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-11-22 20:59:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 20:59:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-11-22 20:59:09,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 33 [2023-11-22 20:59:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:09,198 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-11-22 20:59:09,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 20:59:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-11-22 20:59:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 20:59:09,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:09,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:09,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 20:59:09,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:09,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash -494923785, now seen corresponding path program 1 times [2023-11-22 20:59:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968345024] [2023-11-22 20:59:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:09,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968345024] [2023-11-22 20:59:09,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968345024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127954266] [2023-11-22 20:59:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:09,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:09,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:09,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 20:59:09,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 20:59:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:09,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 20:59:09,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:09,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127954266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 20:59:09,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 20:59:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-22 20:59:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842066773] [2023-11-22 20:59:09,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 20:59:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 20:59:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 20:59:09,429 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:09,477 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-22 20:59:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 20:59:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-11-22 20:59:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:09,480 INFO L225 Difference]: With dead ends: 64 [2023-11-22 20:59:09,480 INFO L226 Difference]: Without dead ends: 45 [2023-11-22 20:59:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-22 20:59:09,481 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:09,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 20:59:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-22 20:59:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-22 20:59:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 20:59:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-22 20:59:09,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 35 [2023-11-22 20:59:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:09,494 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-22 20:59:09,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-22 20:59:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 20:59:09,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:09,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:09,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:09,713 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 [2023-11-22 20:59:09,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:09,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:09,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2007917219, now seen corresponding path program 1 times [2023-11-22 20:59:09,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:09,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063864071] [2023-11-22 20:59:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:09,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063864071] [2023-11-22 20:59:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063864071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087311538] [2023-11-22 20:59:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:10,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:10,135 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) [2023-11-22 20:59:10,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 20:59:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:10,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 20:59:10,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:10,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 20:59:10,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-22 20:59:10,373 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 18 treesize of output 13 [2023-11-22 20:59:10,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-22 20:59:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:10,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 20:59:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087311538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:10,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 20:59:10,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 19 [2023-11-22 20:59:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314062286] [2023-11-22 20:59:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 20:59:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 20:59:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-22 20:59:10,439 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:10,605 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-11-22 20:59:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 20:59:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-22 20:59:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:10,608 INFO L225 Difference]: With dead ends: 63 [2023-11-22 20:59:10,608 INFO L226 Difference]: Without dead ends: 61 [2023-11-22 20:59:10,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-22 20:59:10,610 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:10,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-22 20:59:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2023-11-22 20:59:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 20:59:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-11-22 20:59:10,627 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 38 [2023-11-22 20:59:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:10,628 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-11-22 20:59:10,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-11-22 20:59:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 20:59:10,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:10,632 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:10,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:10,847 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 [2023-11-22 20:59:10,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:10,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2009764261, now seen corresponding path program 1 times [2023-11-22 20:59:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950751831] [2023-11-22 20:59:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 20:59:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950751831] [2023-11-22 20:59:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950751831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-22 20:59:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030449744] [2023-11-22 20:59:11,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 20:59:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 20:59:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-22 20:59:11,052 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:11,189 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2023-11-22 20:59:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 20:59:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-22 20:59:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:11,191 INFO L225 Difference]: With dead ends: 82 [2023-11-22 20:59:11,191 INFO L226 Difference]: Without dead ends: 68 [2023-11-22 20:59:11,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-22 20:59:11,192 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:11,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 144 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-22 20:59:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2023-11-22 20:59:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-22 20:59:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-11-22 20:59:11,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 38 [2023-11-22 20:59:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-11-22 20:59:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-11-22 20:59:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 20:59:11,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:11,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 20:59:11,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:11,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 587577742, now seen corresponding path program 2 times [2023-11-22 20:59:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282806731] [2023-11-22 20:59:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-22 20:59:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282806731] [2023-11-22 20:59:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282806731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000856635] [2023-11-22 20:59:11,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 20:59:11,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:11,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:11,996 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) [2023-11-22 20:59:12,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 20:59:12,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 20:59:12,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 20:59:12,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-22 20:59:12,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:12,275 INFO L349 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2023-11-22 20:59:12,275 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 1 case distinctions, treesize of input 38 treesize of output 19 [2023-11-22 20:59:12,531 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-22 20:59:12,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2023-11-22 20:59:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:12,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:12,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 20:59:12,985 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 515 treesize of output 447 [2023-11-22 20:59:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000856635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 20:59:14,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 20:59:14,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 33 [2023-11-22 20:59:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568911024] [2023-11-22 20:59:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-22 20:59:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-22 20:59:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 20:59:14,928 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 33 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 20:59:17,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:17,748 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2023-11-22 20:59:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 20:59:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2023-11-22 20:59:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:17,750 INFO L225 Difference]: With dead ends: 116 [2023-11-22 20:59:17,750 INFO L226 Difference]: Without dead ends: 77 [2023-11-22 20:59:17,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 20:59:17,751 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:17,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 614 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-22 20:59:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-22 20:59:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2023-11-22 20:59:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-22 20:59:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2023-11-22 20:59:17,761 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 38 [2023-11-22 20:59:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:17,761 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2023-11-22 20:59:17,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 20:59:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2023-11-22 20:59:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-22 20:59:17,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:17,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:17,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:17,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:17,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:17,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1475634685, now seen corresponding path program 3 times [2023-11-22 20:59:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934143319] [2023-11-22 20:59:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-22 20:59:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934143319] [2023-11-22 20:59:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934143319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:18,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:18,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 20:59:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248482012] [2023-11-22 20:59:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:18,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 20:59:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 20:59:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 20:59:18,033 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:18,091 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2023-11-22 20:59:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 20:59:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-11-22 20:59:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:18,093 INFO L225 Difference]: With dead ends: 107 [2023-11-22 20:59:18,093 INFO L226 Difference]: Without dead ends: 66 [2023-11-22 20:59:18,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-22 20:59:18,097 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:18,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 138 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 20:59:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-22 20:59:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-11-22 20:59:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-22 20:59:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-11-22 20:59:18,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 43 [2023-11-22 20:59:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:18,105 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-11-22 20:59:18,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 20:59:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-11-22 20:59:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 20:59:18,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:18,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:18,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 20:59:18,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:18,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -473912466, now seen corresponding path program 1 times [2023-11-22 20:59:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:18,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338022652] [2023-11-22 20:59:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:18,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 20:59:18,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338022652] [2023-11-22 20:59:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338022652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-22 20:59:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797413620] [2023-11-22 20:59:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 20:59:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 20:59:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 20:59:18,311 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 20:59:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:18,450 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2023-11-22 20:59:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 20:59:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2023-11-22 20:59:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:18,452 INFO L225 Difference]: With dead ends: 79 [2023-11-22 20:59:18,452 INFO L226 Difference]: Without dead ends: 77 [2023-11-22 20:59:18,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-22 20:59:18,453 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 186 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-22 20:59:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2023-11-22 20:59:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.196078431372549) internal successors, (61), 54 states have internal predecessors, (61), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 20:59:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2023-11-22 20:59:18,465 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 45 [2023-11-22 20:59:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:18,466 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2023-11-22 20:59:18,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 20:59:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2023-11-22 20:59:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 20:59:18,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:18,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:18,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 20:59:18,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:18,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash -472065424, now seen corresponding path program 1 times [2023-11-22 20:59:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681140802] [2023-11-22 20:59:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 20:59:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681140802] [2023-11-22 20:59:18,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681140802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:18,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 20:59:18,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 20:59:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877537418] [2023-11-22 20:59:18,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:18,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 20:59:18,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 20:59:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 20:59:18,648 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 20:59:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:18,728 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2023-11-22 20:59:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 20:59:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2023-11-22 20:59:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:18,729 INFO L225 Difference]: With dead ends: 90 [2023-11-22 20:59:18,729 INFO L226 Difference]: Without dead ends: 79 [2023-11-22 20:59:18,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-22 20:59:18,730 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:18,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 20:59:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-22 20:59:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2023-11-22 20:59:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 56 states have internal predecessors, (63), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-22 20:59:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-11-22 20:59:18,741 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 45 [2023-11-22 20:59:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:18,741 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-11-22 20:59:18,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 20:59:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-11-22 20:59:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 20:59:18,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:18,742 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:18,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 20:59:18,742 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1676248338, now seen corresponding path program 1 times [2023-11-22 20:59:18,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:18,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920456649] [2023-11-22 20:59:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:18,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 20:59:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920456649] [2023-11-22 20:59:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920456649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:18,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721501234] [2023-11-22 20:59:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:18,973 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) [2023-11-22 20:59:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 20:59:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:19,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-22 20:59:19,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:19,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 20:59:19,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-22 20:59:19,168 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 [2023-11-22 20:59:19,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 20:59:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-22 20:59:19,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 20:59:19,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721501234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 20:59:19,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 20:59:19,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2023-11-22 20:59:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913637402] [2023-11-22 20:59:19,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 20:59:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 20:59:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 20:59:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-22 20:59:19,223 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:21,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:23,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:25,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:25,359 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2023-11-22 20:59:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 20:59:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2023-11-22 20:59:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:25,361 INFO L225 Difference]: With dead ends: 120 [2023-11-22 20:59:25,361 INFO L226 Difference]: Without dead ends: 101 [2023-11-22 20:59:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-22 20:59:25,362 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:25,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 167 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2023-11-22 20:59:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-22 20:59:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-22 20:59:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 74 states have internal predecessors, (80), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-22 20:59:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2023-11-22 20:59:25,373 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 45 [2023-11-22 20:59:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:25,374 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2023-11-22 20:59:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-22 20:59:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2023-11-22 20:59:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-22 20:59:25,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:25,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:25,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 20:59:25,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:25,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1196532439, now seen corresponding path program 4 times [2023-11-22 20:59:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700856373] [2023-11-22 20:59:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:26,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:26,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-22 20:59:26,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700856373] [2023-11-22 20:59:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700856373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795038731] [2023-11-22 20:59:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 20:59:26,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:26,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:26,877 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) [2023-11-22 20:59:26,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 20:59:26,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 20:59:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 20:59:26,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-22 20:59:26,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:26,977 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 7 treesize of output 6 [2023-11-22 20:59:27,415 INFO L349 Elim1Store]: treesize reduction 88, result has 28.5 percent of original size [2023-11-22 20:59:27,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 78 [2023-11-22 20:59:27,437 INFO L349 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2023-11-22 20:59:27,437 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 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-22 20:59:29,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 20:59:29,497 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 160 treesize of output 142 [2023-11-22 20:59:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-22 20:59:29,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795038731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:30,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 20:59:30,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2023-11-22 20:59:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387868179] [2023-11-22 20:59:30,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 20:59:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 20:59:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1151, Unknown=1, NotChecked=0, Total=1332 [2023-11-22 20:59:30,218 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 29 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-22 20:59:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:32,664 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2023-11-22 20:59:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 20:59:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 45 [2023-11-22 20:59:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:32,667 INFO L225 Difference]: With dead ends: 146 [2023-11-22 20:59:32,667 INFO L226 Difference]: Without dead ends: 91 [2023-11-22 20:59:32,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=304, Invalid=1951, Unknown=1, NotChecked=0, Total=2256 [2023-11-22 20:59:32,669 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:32,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 20:59:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-22 20:59:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2023-11-22 20:59:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 61 states have internal predecessors, (64), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 20:59:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-11-22 20:59:32,682 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 45 [2023-11-22 20:59:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:32,682 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-11-22 20:59:32,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-22 20:59:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-11-22 20:59:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-22 20:59:32,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:32,683 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:32,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-22 20:59:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:32,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -235152943, now seen corresponding path program 1 times [2023-11-22 20:59:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655506291] [2023-11-22 20:59:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 20:59:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 20:59:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655506291] [2023-11-22 20:59:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655506291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79905615] [2023-11-22 20:59:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:33,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 20:59:33,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 20:59:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:33,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 20:59:33,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:33,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 20:59:33,456 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 27 treesize of output 15 [2023-11-22 20:59:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 20:59:33,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:33,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 20:59:33,970 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 706 treesize of output 654 [2023-11-22 20:59:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 20:59:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79905615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 20:59:34,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 20:59:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 27 [2023-11-22 20:59:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245296017] [2023-11-22 20:59:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-22 20:59:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-22 20:59:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-22 20:59:34,546 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-22 20:59:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:35,080 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2023-11-22 20:59:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-22 20:59:35,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2023-11-22 20:59:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:35,081 INFO L225 Difference]: With dead ends: 128 [2023-11-22 20:59:35,081 INFO L226 Difference]: Without dead ends: 122 [2023-11-22 20:59:35,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 20:59:35,082 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:35,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 329 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 20:59:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-22 20:59:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2023-11-22 20:59:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-22 20:59:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2023-11-22 20:59:35,095 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 51 [2023-11-22 20:59:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:35,096 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2023-11-22 20:59:35,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 26 states have internal predecessors, (51), 9 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-22 20:59:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2023-11-22 20:59:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-22 20:59:35,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:35,097 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:35,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:35,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:35,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -163668729, now seen corresponding path program 1 times [2023-11-22 20:59:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:35,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781854459] [2023-11-22 20:59:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:35,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 20:59:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-22 20:59:35,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:35,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781854459] [2023-11-22 20:59:35,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781854459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:35,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377709001] [2023-11-22 20:59:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:35,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:35,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:35,456 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 20:59:35,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 20:59:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:35,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 20:59:35,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:35,628 INFO L349 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2023-11-22 20:59:35,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 72 [2023-11-22 20:59:35,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-22 20:59:35,644 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-22 20:59:35,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-11-22 20:59:35,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-22 20:59:35,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-22 20:59:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-22 20:59:35,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 20:59:35,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 20:59:35,765 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 146 treesize of output 146 [2023-11-22 20:59:35,772 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 142 treesize of output 134 [2023-11-22 20:59:35,816 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 130 treesize of output 124 [2023-11-22 20:59:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-22 20:59:35,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377709001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 20:59:35,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 20:59:35,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2023-11-22 20:59:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190257169] [2023-11-22 20:59:35,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 20:59:35,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 20:59:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 20:59:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 20:59:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-22 20:59:35,931 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 20:59:37,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:39,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:41,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 20:59:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 20:59:42,148 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2023-11-22 20:59:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-22 20:59:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2023-11-22 20:59:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 20:59:42,149 INFO L225 Difference]: With dead ends: 106 [2023-11-22 20:59:42,149 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 20:59:42,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-22 20:59:42,150 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-22 20:59:42,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 221 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 220 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2023-11-22 20:59:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 20:59:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-11-22 20:59:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 20:59:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-22 20:59:42,185 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 52 [2023-11-22 20:59:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 20:59:42,186 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-22 20:59:42,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-22 20:59:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-22 20:59:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 20:59:42,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 20:59:42,187 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 20:59:42,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 20:59:42,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 20:59:42,401 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 20:59:42,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 20:59:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash -13878542, now seen corresponding path program 1 times [2023-11-22 20:59:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 20:59:42,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081278781] [2023-11-22 20:59:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:42,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 20:59:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 20:59:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 20:59:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-22 20:59:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 20:59:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 20:59:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 20:59:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 20:59:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-22 20:59:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-22 20:59:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 20:59:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081278781] [2023-11-22 20:59:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081278781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 20:59:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695738372] [2023-11-22 20:59:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 20:59:43,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 20:59:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 20:59:43,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 20:59:43,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 20:59:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 20:59:43,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-22 20:59:43,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 20:59:43,210 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 7 treesize of output 6 [2023-11-22 20:59:43,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-22 20:59:43,590 INFO L349 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2023-11-22 20:59:43,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 53 [2023-11-22 20:59:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 20:59:43,911 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2023-11-22 20:59:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 20:59:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 20:59:43,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 69 treesize of output 64 [2023-11-22 20:59:43,920 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 [2023-11-22 20:59:43,924 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 [2023-11-22 21:00:18,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 21:00:20,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:00:20,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 269 treesize of output 641 Killed by 15