./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bAnd5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-crafted/bAnd5.i -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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:09:21,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:09:21,649 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:09:21,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:09:21,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:09:21,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:09:21,684 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:09:21,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:09:21,685 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:09:21,686 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:09:21,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:09:21,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:09:21,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:09:21,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:09:21,689 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:09:21,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:09:21,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:09:21,690 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:09:21,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:09:21,690 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:09:21,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:09:21,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:09:21,691 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:09:21,692 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:09:21,693 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:09:21,693 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:09:21,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:09:21,694 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:09:21,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:09:21,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:09:21,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:09:21,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:09:21,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:09:21,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:09:21,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:09:21,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:09:21,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:09:21,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:09:21,698 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:09:21,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:09:21,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:09:21,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:09:21,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2024-11-18 09:09:21,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:09:21,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:09:21,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:09:21,915 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:09:21,915 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:09:21,916 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd5.i [2024-11-18 09:09:23,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:09:23,623 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:09:23,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i [2024-11-18 09:09:23,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1944ee2ca/2e32e7b544cb4622a4da690ed160142c/FLAG0b4a333f8 [2024-11-18 09:09:23,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1944ee2ca/2e32e7b544cb4622a4da690ed160142c [2024-11-18 09:09:23,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:09:23,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:09:23,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:09:23,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:09:24,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:09:24,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:09:23" (1/1) ... [2024-11-18 09:09:24,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed543ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24, skipping insertion in model container [2024-11-18 09:09:24,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:09:23" (1/1) ... [2024-11-18 09:09:24,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:09:24,163 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2024-11-18 09:09:24,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:09:24,175 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:09:24,199 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2024-11-18 09:09:24,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:09:24,214 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:09:24,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24 WrapperNode [2024-11-18 09:09:24,215 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:09:24,216 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:09:24,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:09:24,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:09:24,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,241 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2024-11-18 09:09:24,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:09:24,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:09:24,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:09:24,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:09:24,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,271 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 8, 11]. 52 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-11-18 09:09:24,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:09:24,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:09:24,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:09:24,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:09:24,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (1/1) ... [2024-11-18 09:09:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:09:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:09:24,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 09:09:24,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 09:09:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:09:24,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2024-11-18 09:09:24,433 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:09:24,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:09:24,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 09:09:24,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 09:09:24,500 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:09:24,502 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:09:24,692 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-18 09:09:24,692 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:09:24,705 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:09:24,705 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-18 09:09:24,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:09:24 BoogieIcfgContainer [2024-11-18 09:09:24,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:09:24,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:09:24,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:09:24,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:09:24,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:09:23" (1/3) ... [2024-11-18 09:09:24,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0949d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:09:24, skipping insertion in model container [2024-11-18 09:09:24,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:09:24" (2/3) ... [2024-11-18 09:09:24,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0949d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:09:24, skipping insertion in model container [2024-11-18 09:09:24,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:09:24" (3/3) ... [2024-11-18 09:09:24,712 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2024-11-18 09:09:24,726 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:09:24,726 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:09:24,769 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:09:24,775 INFO L333 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, 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;@66852341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:09:24,775 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:09:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:09:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-18 09:09:24,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:24,784 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:09:24,784 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:24,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1617415168, now seen corresponding path program 1 times [2024-11-18 09:09:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326543659] [2024-11-18 09:09:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 09:09:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:25,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326543659] [2024-11-18 09:09:25,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326543659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:09:25,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:09:25,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 09:09:25,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697474025] [2024-11-18 09:09:25,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:09:25,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 09:09:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 09:09:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:09:25,135 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 09:09:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:09:25,196 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-11-18 09:09:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 09:09:25,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-18 09:09:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:09:25,206 INFO L225 Difference]: With dead ends: 63 [2024-11-18 09:09:25,206 INFO L226 Difference]: Without dead ends: 30 [2024-11-18 09:09:25,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:09:25,212 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:09:25,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:09:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-18 09:09:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-18 09:09:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:09:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-18 09:09:25,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 30 [2024-11-18 09:09:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:09:25,257 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-18 09:09:25,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 09:09:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-18 09:09:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 09:09:25,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:25,259 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:09:25,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:09:25,259 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:25,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1295325000, now seen corresponding path program 1 times [2024-11-18 09:09:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768632007] [2024-11-18 09:09:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:25,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 09:09:25,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768632007] [2024-11-18 09:09:25,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768632007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:09:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375721969] [2024-11-18 09:09:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:25,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:25,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:09:25,501 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) [2024-11-18 09:09:25,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:09:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:25,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:09:25,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:09:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 09:09:25,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:09:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 09:09:25,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375721969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:09:25,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:09:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-18 09:09:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979052894] [2024-11-18 09:09:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:09:25,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 09:09:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 09:09:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-18 09:09:25,664 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-18 09:09:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:09:25,787 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2024-11-18 09:09:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 09:09:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2024-11-18 09:09:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:09:25,790 INFO L225 Difference]: With dead ends: 61 [2024-11-18 09:09:25,790 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 09:09:25,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-18 09:09:25,791 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:09:25,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 110 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:09:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 09:09:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2024-11-18 09:09:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:09:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-18 09:09:25,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 32 [2024-11-18 09:09:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:09:25,802 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-18 09:09:25,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-18 09:09:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-18 09:09:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 09:09:25,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:25,803 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:09:25,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:09:26,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:26,004 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:26,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1588566225, now seen corresponding path program 1 times [2024-11-18 09:09:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238814499] [2024-11-18 09:09:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 09:09:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:26,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238814499] [2024-11-18 09:09:26,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238814499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:09:26,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:09:26,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 09:09:26,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477746757] [2024-11-18 09:09:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:09:26,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 09:09:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 09:09:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:09:26,283 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:09:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:09:26,344 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-11-18 09:09:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 09:09:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-18 09:09:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:09:26,346 INFO L225 Difference]: With dead ends: 51 [2024-11-18 09:09:26,346 INFO L226 Difference]: Without dead ends: 34 [2024-11-18 09:09:26,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:09:26,348 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:09:26,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:09:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-18 09:09:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-18 09:09:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 09:09:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-18 09:09:26,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 46 [2024-11-18 09:09:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:09:26,359 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-18 09:09:26,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 09:09:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-18 09:09:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-18 09:09:26,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:26,361 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:09:26,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 09:09:26,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:26,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 480375887, now seen corresponding path program 1 times [2024-11-18 09:09:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:26,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46595973] [2024-11-18 09:09:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 09:09:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46595973] [2024-11-18 09:09:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46595973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:09:26,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688451785] [2024-11-18 09:09:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:26,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:26,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:09:26,987 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) [2024-11-18 09:09:26,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:09:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:27,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-18 09:09:27,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:09:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 09:09:27,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:09:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 09:09:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688451785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:09:27,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:09:27,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 17 [2024-11-18 09:09:27,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199778075] [2024-11-18 09:09:27,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:09:27,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 09:09:27,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:27,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 09:09:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-18 09:09:27,445 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 09:09:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:09:27,538 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2024-11-18 09:09:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 09:09:27,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2024-11-18 09:09:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:09:27,541 INFO L225 Difference]: With dead ends: 83 [2024-11-18 09:09:27,541 INFO L226 Difference]: Without dead ends: 58 [2024-11-18 09:09:27,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-18 09:09:27,543 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:09:27,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 300 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:09:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-18 09:09:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-11-18 09:09:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-18 09:09:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-11-18 09:09:27,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 48 [2024-11-18 09:09:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:09:27,557 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-11-18 09:09:27,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 09:09:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-11-18 09:09:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 09:09:27,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:27,559 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-18 09:09:27,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 09:09:27,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 09:09:27,766 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:27,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1030385955, now seen corresponding path program 1 times [2024-11-18 09:09:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859643512] [2024-11-18 09:09:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:09:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859643512] [2024-11-18 09:09:28,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859643512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:09:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001563731] [2024-11-18 09:09:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:09:28,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:09:28,933 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) [2024-11-18 09:09:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:09:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:09:29,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-18 09:09:29,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:09:29,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 09:09:29,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:09:29,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2024-11-18 09:09:29,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:09:29,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2024-11-18 09:09:29,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:09:29,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-11-18 09:09:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:09:30,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:09:31,320 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 176 treesize of output 156 [2024-11-18 09:09:31,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:09:31,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 125 [2024-11-18 09:09:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:09:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001563731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:09:31,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:09:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 19] total 55 [2024-11-18 09:09:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462120562] [2024-11-18 09:09:31,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:09:31,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-18 09:09:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-18 09:09:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 09:09:31,518 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 55 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 09:09:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:09:33,650 INFO L93 Difference]: Finished difference Result 257 states and 355 transitions. [2024-11-18 09:09:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-18 09:09:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2024-11-18 09:09:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:09:33,653 INFO L225 Difference]: With dead ends: 257 [2024-11-18 09:09:33,653 INFO L226 Difference]: Without dead ends: 214 [2024-11-18 09:09:33,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=797, Invalid=6009, Unknown=0, NotChecked=0, Total=6806 [2024-11-18 09:09:33,656 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-18 09:09:33,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 510 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-18 09:09:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-18 09:09:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 173. [2024-11-18 09:09:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 153 states have internal predecessors, (178), 16 states have call successors, (16), 4 states have call predecessors, (16), 11 states have return successors, (55), 15 states have call predecessors, (55), 16 states have call successors, (55) [2024-11-18 09:09:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 249 transitions. [2024-11-18 09:09:33,686 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 249 transitions. Word has length 49 [2024-11-18 09:09:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:09:33,686 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 249 transitions. [2024-11-18 09:09:33,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 09:09:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 249 transitions. [2024-11-18 09:09:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 09:09:33,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:09:33,690 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-18 09:09:33,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 09:09:33,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:33,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:09:33,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:09:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash -292912813, now seen corresponding path program 2 times [2024-11-18 09:09:33,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:09:33,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636087963] [2024-11-18 09:09:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:09:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:09:33,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:09:33,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:09:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-18 09:09:34,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:09:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636087963] [2024-11-18 09:09:34,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636087963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:09:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90774626] [2024-11-18 09:09:34,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:09:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:09:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:09:34,371 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) [2024-11-18 09:09:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:09:34,433 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:09:34,434 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:09:34,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-18 09:09:34,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:09:34,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 09:09:34,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:09:34,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-11-18 09:09:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 09:09:34,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:09:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 09:09:35,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90774626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:09:35,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:09:35,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2024-11-18 09:09:35,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140389672] [2024-11-18 09:09:35,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:09:35,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 09:09:35,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:09:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 09:09:35,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2024-11-18 09:09:35,107 INFO L87 Difference]: Start difference. First operand 173 states and 249 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 09:09:39,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:09:43,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:09:47,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:09:51,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:09:55,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:09:59,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:03,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:07,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:11,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:10:11,913 INFO L93 Difference]: Finished difference Result 381 states and 511 transitions. [2024-11-18 09:10:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 09:10:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2024-11-18 09:10:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:10:11,916 INFO L225 Difference]: With dead ends: 381 [2024-11-18 09:10:11,917 INFO L226 Difference]: Without dead ends: 240 [2024-11-18 09:10:11,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2024-11-18 09:10:11,919 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 27 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2024-11-18 09:10:11,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 436 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 683 Invalid, 9 Unknown, 0 Unchecked, 36.5s Time] [2024-11-18 09:10:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-18 09:10:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 208. [2024-11-18 09:10:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 176 states have (on average 1.2215909090909092) internal successors, (215), 184 states have internal predecessors, (215), 17 states have call successors, (17), 7 states have call predecessors, (17), 14 states have return successors, (50), 16 states have call predecessors, (50), 17 states have call successors, (50) [2024-11-18 09:10:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2024-11-18 09:10:11,960 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 49 [2024-11-18 09:10:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:10:11,960 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2024-11-18 09:10:11,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 09:10:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2024-11-18 09:10:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 09:10:11,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:10:11,965 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-18 09:10:11,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 09:10:12,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:10:12,166 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:10:12,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:10:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1070110065, now seen corresponding path program 3 times [2024-11-18 09:10:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:10:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084499089] [2024-11-18 09:10:12,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:10:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:10:12,202 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:10:12,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:10:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 09:10:13,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:10:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084499089] [2024-11-18 09:10:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084499089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:10:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988811871] [2024-11-18 09:10:13,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:10:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:10:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:10:13,343 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) [2024-11-18 09:10:13,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:10:13,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:10:13,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:10:13,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-18 09:10:13,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:10:13,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 09:10:13,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-18 09:10:13,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:10:13,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-11-18 09:10:13,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:10:13,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2024-11-18 09:10:13,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:10:13,943 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-18 09:10:13,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 33 [2024-11-18 09:10:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:10:14,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:10:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 09:10:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988811871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:10:15,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:10:15,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 16] total 57 [2024-11-18 09:10:15,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290156622] [2024-11-18 09:10:15,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:10:15,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-18 09:10:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:10:15,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-18 09:10:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2904, Unknown=0, NotChecked=0, Total=3192 [2024-11-18 09:10:15,136 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 57 states, 54 states have (on average 2.185185185185185) internal successors, (118), 53 states have internal predecessors, (118), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-18 09:10:19,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:23,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:27,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:31,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:35,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:39,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:43,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:47,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:52,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:10:56,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:11:00,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-18 09:11:04,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]