./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/array-fpi/s2lif.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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:10:11,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:10:11,923 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:10:11,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:10:11,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:10:11,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:10:11,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:10:11,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:10:11,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:10:11,952 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:10:11,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:10:11,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:10:11,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:10:11,955 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:10:11,955 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:10:11,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:10:11,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:10:11,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:10:11,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:10:11,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:10:11,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:10:11,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:10:11,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:10:11,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:10:11,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:10:11,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:10:11,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:10:11,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:10:11,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:10:11,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:10:11,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:10:11,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:10:11,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:10:11,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:10:11,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:10:11,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:10:11,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:10:11,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:10:11,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:10:11,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:10:11,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:10:11,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:10:11,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2024-11-21 21:10:12,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:10:12,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:10:12,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:10:12,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:10:12,171 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:10:12,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2lif.c [2024-11-21 21:10:13,434 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:10:13,585 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:10:13,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-11-21 21:10:13,593 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8359028f/77ab716c81494328bb3b9ff2b0ed0e50/FLAGd7897d06c [2024-11-21 21:10:13,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8359028f/77ab716c81494328bb3b9ff2b0ed0e50 [2024-11-21 21:10:13,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:10:13,610 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:10:13,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:10:13,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:10:13,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:10:13,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0589c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13, skipping insertion in model container [2024-11-21 21:10:13,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:10:13,810 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-fpi/s2lif.c[588,601] [2024-11-21 21:10:13,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:10:13,840 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:10:13,850 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-fpi/s2lif.c[588,601] [2024-11-21 21:10:13,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:10:13,872 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:10:13,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13 WrapperNode [2024-11-21 21:10:13,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:10:13,874 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:10:13,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:10:13,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:10:13,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,908 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-11-21 21:10:13,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:10:13,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:10:13,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:10:13,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:10:13,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,924 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,937 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 7, 4]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 3, 2]. [2024-11-21 21:10:13,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:10:13,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:10:13,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:10:13,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:10:13,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (1/1) ... [2024-11-21 21:10:13,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:10:13,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:13,990 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) [2024-11-21 21:10:13,996 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 [2024-11-21 21:10:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:10:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:10:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 21:10:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 21:10:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-21 21:10:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 21:10:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 21:10:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 21:10:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:10:14,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 21:10:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 21:10:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-21 21:10:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 21:10:14,131 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:10:14,135 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:10:14,281 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-21 21:10:14,282 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:10:14,294 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:10:14,295 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 21:10:14,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:10:14 BoogieIcfgContainer [2024-11-21 21:10:14,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:10:14,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:10:14,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:10:14,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:10:14,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:10:13" (1/3) ... [2024-11-21 21:10:14,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42605d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:10:14, skipping insertion in model container [2024-11-21 21:10:14,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:13" (2/3) ... [2024-11-21 21:10:14,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42605d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:10:14, skipping insertion in model container [2024-11-21 21:10:14,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:10:14" (3/3) ... [2024-11-21 21:10:14,303 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2024-11-21 21:10:14,316 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:10:14,317 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:10:14,370 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:10:14,377 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;@467051a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:10:14,377 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:10:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 21:10:14,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:14,387 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:14,388 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:14,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2024-11-21 21:10:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296998382] [2024-11-21 21:10:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:14,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296998382] [2024-11-21 21:10:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296998382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:10:14,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:10:14,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 21:10:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573839311] [2024-11-21 21:10:14,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:10:14,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 21:10:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:14,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 21:10:14,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:10:14,576 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:14,590 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-21 21:10:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 21:10:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 21:10:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:14,598 INFO L225 Difference]: With dead ends: 40 [2024-11-21 21:10:14,598 INFO L226 Difference]: Without dead ends: 18 [2024-11-21 21:10:14,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:10:14,604 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:14,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:10:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-21 21:10:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-21 21:10:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-21 21:10:14,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-21 21:10:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:14,630 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-21 21:10:14,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-21 21:10:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 21:10:14,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:14,630 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:14,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 21:10:14,631 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:14,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2024-11-21 21:10:14,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:14,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968158762] [2024-11-21 21:10:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968158762] [2024-11-21 21:10:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968158762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:10:14,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:10:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 21:10:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937016005] [2024-11-21 21:10:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:10:14,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:10:14,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:10:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-21 21:10:14,765 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:14,818 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-21 21:10:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 21:10:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 21:10:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:14,819 INFO L225 Difference]: With dead ends: 36 [2024-11-21 21:10:14,819 INFO L226 Difference]: Without dead ends: 25 [2024-11-21 21:10:14,819 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 [2024-11-21 21:10:14,820 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:14,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:10:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-21 21:10:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-21 21:10:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-21 21:10:14,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-21 21:10:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:14,825 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-21 21:10:14,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-21 21:10:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:10:14,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:14,827 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:14,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 21:10:14,827 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:14,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2024-11-21 21:10:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682353076] [2024-11-21 21:10:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:14,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:15,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:15,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682353076] [2024-11-21 21:10:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682353076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538521358] [2024-11-21 21:10:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:15,744 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) [2024-11-21 21:10:15,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 21:10:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:15,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-21 21:10:15,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:15,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:16,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:16,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:16,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:16,244 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 35 treesize of output 31 [2024-11-21 21:10:16,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:16,257 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 44 treesize of output 44 [2024-11-21 21:10:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:16,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538521358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:16,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:16,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2024-11-21 21:10:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750823038] [2024-11-21 21:10:16,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:16,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:10:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:10:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:10:16,378 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:16,710 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-21 21:10:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:10:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-21 21:10:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:16,712 INFO L225 Difference]: With dead ends: 46 [2024-11-21 21:10:16,712 INFO L226 Difference]: Without dead ends: 42 [2024-11-21 21:10:16,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2024-11-21 21:10:16,713 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:16,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 51 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:10:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-21 21:10:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-11-21 21:10:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-21 21:10:16,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2024-11-21 21:10:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:16,719 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-21 21:10:16,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-21 21:10:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:10:16,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:16,720 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:16,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 21:10:16,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:16,925 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:16,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2024-11-21 21:10:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118827187] [2024-11-21 21:10:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118827187] [2024-11-21 21:10:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118827187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887024948] [2024-11-21 21:10:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:17,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:17,092 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) [2024-11-21 21:10:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 21:10:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:17,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-21 21:10:17,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:17,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:17,217 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 14 treesize of output 12 [2024-11-21 21:10:17,220 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 14 treesize of output 12 [2024-11-21 21:10:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887024948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:17,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:17,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-21 21:10:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802708887] [2024-11-21 21:10:17,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:17,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-21 21:10:17,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-21 21:10:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:10:17,232 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:17,314 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-21 21:10:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 21:10:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-21 21:10:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:17,315 INFO L225 Difference]: With dead ends: 48 [2024-11-21 21:10:17,316 INFO L226 Difference]: Without dead ends: 37 [2024-11-21 21:10:17,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:10:17,317 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:17,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-21 21:10:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-11-21 21:10:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-21 21:10:17,329 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2024-11-21 21:10:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:17,329 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-21 21:10:17,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-21 21:10:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 21:10:17,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:17,330 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:17,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-21 21:10:17,530 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 [2024-11-21 21:10:17,531 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:17,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2024-11-21 21:10:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:17,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608555467] [2024-11-21 21:10:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:17,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:17,559 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:17,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608555467] [2024-11-21 21:10:17,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608555467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640085760] [2024-11-21 21:10:17,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:17,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:17,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:17,693 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) [2024-11-21 21:10:17,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 21:10:17,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:17,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:17,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:10:17,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640085760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:17,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:10:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337909781] [2024-11-21 21:10:17,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:17,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:10:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:10:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:10:17,827 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:17,896 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-11-21 21:10:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:10:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-21 21:10:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:17,899 INFO L225 Difference]: With dead ends: 66 [2024-11-21 21:10:17,899 INFO L226 Difference]: Without dead ends: 40 [2024-11-21 21:10:17,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:10:17,900 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:17,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-21 21:10:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-21 21:10:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-21 21:10:17,904 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2024-11-21 21:10:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:17,905 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-21 21:10:17,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-21 21:10:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 21:10:17,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:17,905 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:17,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:18,109 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 [2024-11-21 21:10:18,110 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:18,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2024-11-21 21:10:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:18,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326736186] [2024-11-21 21:10:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:18,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 21:10:18,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:18,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:18,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326736186] [2024-11-21 21:10:18,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326736186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:18,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440731875] [2024-11-21 21:10:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:18,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:18,727 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) [2024-11-21 21:10:18,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 21:10:18,773 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 21:10:18,773 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:18,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-21 21:10:18,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:18,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:18,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:18,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:18,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:19,127 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 35 treesize of output 31 [2024-11-21 21:10:19,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:19,137 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 44 treesize of output 44 [2024-11-21 21:10:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440731875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:19,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:19,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2024-11-21 21:10:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874992169] [2024-11-21 21:10:19,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:19,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-21 21:10:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-21 21:10:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-21 21:10:19,215 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:19,634 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-11-21 21:10:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-21 21:10:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-21 21:10:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:19,636 INFO L225 Difference]: With dead ends: 50 [2024-11-21 21:10:19,636 INFO L226 Difference]: Without dead ends: 41 [2024-11-21 21:10:19,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-11-21 21:10:19,637 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:19,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-21 21:10:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2024-11-21 21:10:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-21 21:10:19,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2024-11-21 21:10:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:19,643 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-21 21:10:19,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-21 21:10:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-21 21:10:19,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:19,644 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:19,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 21:10:19,848 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 [2024-11-21 21:10:19,849 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:19,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1447181833, now seen corresponding path program 1 times [2024-11-21 21:10:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:19,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851514116] [2024-11-21 21:10:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:19,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:19,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851514116] [2024-11-21 21:10:19,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851514116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:19,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066453422] [2024-11-21 21:10:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:19,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:19,920 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) [2024-11-21 21:10:19,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 21:10:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:19,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:10:19,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:20,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:20,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066453422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:20,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:10:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661464142] [2024-11-21 21:10:20,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:20,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:10:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:10:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:10:20,057 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:20,132 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-11-21 21:10:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:10:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-21 21:10:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:20,133 INFO L225 Difference]: With dead ends: 43 [2024-11-21 21:10:20,133 INFO L226 Difference]: Without dead ends: 39 [2024-11-21 21:10:20,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:10:20,134 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:20,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:10:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-21 21:10:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2024-11-21 21:10:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-21 21:10:20,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2024-11-21 21:10:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:20,139 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-21 21:10:20,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-21 21:10:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:10:20,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:20,139 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:20,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-21 21:10:20,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:20,341 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:20,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:20,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2024-11-21 21:10:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:20,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761406770] [2024-11-21 21:10:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:20,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:20,356 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:20,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:21,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761406770] [2024-11-21 21:10:21,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761406770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894053287] [2024-11-21 21:10:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:21,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:21,153 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) [2024-11-21 21:10:21,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 21:10:21,209 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:21,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:21,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-21 21:10:21,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:21,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:21,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:21,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:21,495 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 26 treesize of output 21 [2024-11-21 21:10:21,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:21,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:21,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:22,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-11-21 21:10:22,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:22,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 382 treesize of output 379 [2024-11-21 21:10:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:22,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894053287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:22,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:22,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 49 [2024-11-21 21:10:22,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506255335] [2024-11-21 21:10:22,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:22,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-21 21:10:22,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-21 21:10:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 21:10:22,337 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:24,744 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2024-11-21 21:10:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-21 21:10:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-21 21:10:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:24,745 INFO L225 Difference]: With dead ends: 96 [2024-11-21 21:10:24,745 INFO L226 Difference]: Without dead ends: 80 [2024-11-21 21:10:24,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1141, Invalid=7979, Unknown=0, NotChecked=0, Total=9120 [2024-11-21 21:10:24,749 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 114 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:24,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 118 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:10:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-21 21:10:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2024-11-21 21:10:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2024-11-21 21:10:24,756 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 27 [2024-11-21 21:10:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:24,757 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2024-11-21 21:10:24,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2024-11-21 21:10:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:10:24,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:24,758 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:24,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-21 21:10:24,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:24,962 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:24,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 2 times [2024-11-21 21:10:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90544482] [2024-11-21 21:10:24,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:24,976 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:24,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:25,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:25,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90544482] [2024-11-21 21:10:25,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90544482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:25,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541828944] [2024-11-21 21:10:25,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:25,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:25,218 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) [2024-11-21 21:10:25,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 21:10:25,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:25,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:25,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-21 21:10:25,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:25,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:25,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:10:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:25,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:25,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-21 21:10:25,394 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 16 treesize of output 12 [2024-11-21 21:10:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:25,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541828944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:25,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:25,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-11-21 21:10:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012768106] [2024-11-21 21:10:25,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:25,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 21:10:25,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 21:10:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:10:25,415 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:25,572 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-21 21:10:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:10:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-21 21:10:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:25,573 INFO L225 Difference]: With dead ends: 81 [2024-11-21 21:10:25,573 INFO L226 Difference]: Without dead ends: 56 [2024-11-21 21:10:25,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2024-11-21 21:10:25,574 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:25,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 87 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-21 21:10:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-11-21 21:10:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-21 21:10:25,581 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 27 [2024-11-21 21:10:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:25,581 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-21 21:10:25,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-21 21:10:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 21:10:25,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:25,582 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:25,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-21 21:10:25,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:25,783 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:25,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2024-11-21 21:10:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486151467] [2024-11-21 21:10:25,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:25,794 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:10:25,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486151467] [2024-11-21 21:10:25,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486151467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551832567] [2024-11-21 21:10:25,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:25,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:25,847 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) [2024-11-21 21:10:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 21:10:25,908 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:10:25,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:25,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:10:25,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:25,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:25,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551832567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:25,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-21 21:10:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628329334] [2024-11-21 21:10:25,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:25,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-21 21:10:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-21 21:10:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:10:25,990 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:26,078 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2024-11-21 21:10:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:10:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-21 21:10:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:26,079 INFO L225 Difference]: With dead ends: 79 [2024-11-21 21:10:26,079 INFO L226 Difference]: Without dead ends: 43 [2024-11-21 21:10:26,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:10:26,080 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:26,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 35 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-21 21:10:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-11-21 21:10:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-11-21 21:10:26,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2024-11-21 21:10:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:26,084 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-11-21 21:10:26,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-11-21 21:10:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-21 21:10:26,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:26,085 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:26,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-21 21:10:26,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-21 21:10:26,286 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:26,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2024-11-21 21:10:26,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:26,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296274735] [2024-11-21 21:10:26,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:26,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:26,309 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 21:10:26,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:26,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296274735] [2024-11-21 21:10:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296274735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100595016] [2024-11-21 21:10:26,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:26,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:26,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:26,377 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) [2024-11-21 21:10:26,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 21:10:26,447 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 21:10:26,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:26,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:10:26,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:26,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100595016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:26,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:26,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-21 21:10:26,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247342949] [2024-11-21 21:10:26,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:26,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:10:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:10:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:10:26,548 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:26,647 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2024-11-21 21:10:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:10:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-21 21:10:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:26,648 INFO L225 Difference]: With dead ends: 42 [2024-11-21 21:10:26,648 INFO L226 Difference]: Without dead ends: 38 [2024-11-21 21:10:26,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:10:26,649 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:26,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 23 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-21 21:10:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-21 21:10:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-21 21:10:26,653 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2024-11-21 21:10:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:26,653 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-21 21:10:26,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-21 21:10:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 21:10:26,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:26,654 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:26,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-21 21:10:26,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:26,855 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:26,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2024-11-21 21:10:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545385110] [2024-11-21 21:10:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545385110] [2024-11-21 21:10:27,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545385110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219355801] [2024-11-21 21:10:27,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:27,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:27,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:27,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 21:10:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:27,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-21 21:10:27,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:27,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:27,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:28,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:28,021 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 26 treesize of output 21 [2024-11-21 21:10:28,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:28,151 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 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-21 21:10:28,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:28,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:28,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:28,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:29,184 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 137 treesize of output 125 [2024-11-21 21:10:29,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:29,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11773 treesize of output 11191 [2024-11-21 21:10:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:29,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219355801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:29,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:29,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 62 [2024-11-21 21:10:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851046733] [2024-11-21 21:10:29,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:29,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-21 21:10:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-21 21:10:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2024-11-21 21:10:29,650 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:30,518 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2024-11-21 21:10:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-21 21:10:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-21 21:10:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:30,519 INFO L225 Difference]: With dead ends: 77 [2024-11-21 21:10:30,519 INFO L226 Difference]: Without dead ends: 61 [2024-11-21 21:10:30,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=538, Invalid=4718, Unknown=0, NotChecked=0, Total=5256 [2024-11-21 21:10:30,521 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:30,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 107 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:10:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-21 21:10:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2024-11-21 21:10:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2024-11-21 21:10:30,528 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2024-11-21 21:10:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:30,529 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2024-11-21 21:10:30,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2024-11-21 21:10:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 21:10:30,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:30,529 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:30,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-21 21:10:30,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-21 21:10:30,730 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:30,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:30,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 3 times [2024-11-21 21:10:30,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:30,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111536112] [2024-11-21 21:10:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:30,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:30,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:31,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:31,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111536112] [2024-11-21 21:10:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111536112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261643419] [2024-11-21 21:10:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:31,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:31,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:31,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-21 21:10:31,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:31,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:31,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-21 21:10:31,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:31,261 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 13 treesize of output 9 [2024-11-21 21:10:31,323 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-21 21:10:31,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-21 21:10:31,346 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2024-11-21 21:10:31,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2024-11-21 21:10:31,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:31,413 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 25 treesize of output 19 [2024-11-21 21:10:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:31,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:32,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-21 21:10:32,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-21 21:10:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:32,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261643419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:32,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 40 [2024-11-21 21:10:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954737838] [2024-11-21 21:10:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:32,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-21 21:10:32,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-21 21:10:32,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2024-11-21 21:10:32,013 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:33,299 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2024-11-21 21:10:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-21 21:10:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-21 21:10:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:33,300 INFO L225 Difference]: With dead ends: 86 [2024-11-21 21:10:33,300 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:10:33,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1291, Invalid=6191, Unknown=0, NotChecked=0, Total=7482 [2024-11-21 21:10:33,303 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:33,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 60 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:10:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:10:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-11-21 21:10:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-21 21:10:33,311 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 34 [2024-11-21 21:10:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:33,311 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-21 21:10:33,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-21 21:10:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-21 21:10:33,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:33,312 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:33,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-21 21:10:33,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-21 21:10:33,516 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:33,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 8 times [2024-11-21 21:10:33,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:33,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737396068] [2024-11-21 21:10:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:33,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:33,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:33,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:35,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:35,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737396068] [2024-11-21 21:10:35,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737396068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:35,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305001169] [2024-11-21 21:10:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:35,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:35,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:35,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:35,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-21 21:10:35,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:35,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-21 21:10:35,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:35,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:36,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:36,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:36,314 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 26 treesize of output 21 [2024-11-21 21:10:36,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:36,612 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 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-21 21:10:36,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:36,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-21 21:10:37,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:37,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:37,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:37,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:37,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:38,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2024-11-21 21:10:38,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:38,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1455420 treesize of output 1398189 [2024-11-21 21:10:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:39,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305001169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:39,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:39,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 82 [2024-11-21 21:10:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106009348] [2024-11-21 21:10:39,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:39,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-21 21:10:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-21 21:10:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6036, Unknown=0, NotChecked=0, Total=6642 [2024-11-21 21:10:39,665 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 82 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:40,990 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2024-11-21 21:10:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-21 21:10:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-21 21:10:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:40,992 INFO L225 Difference]: With dead ends: 121 [2024-11-21 21:10:40,992 INFO L226 Difference]: Without dead ends: 103 [2024-11-21 21:10:40,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=768, Invalid=7604, Unknown=0, NotChecked=0, Total=8372 [2024-11-21 21:10:40,995 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:40,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 171 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-21 21:10:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-21 21:10:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2024-11-21 21:10:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-11-21 21:10:41,017 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 41 [2024-11-21 21:10:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:41,017 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-11-21 21:10:41,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-11-21 21:10:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-21 21:10:41,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:41,020 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:41,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-21 21:10:41,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-21 21:10:41,225 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:41,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2104513711, now seen corresponding path program 4 times [2024-11-21 21:10:41,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:41,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046551799] [2024-11-21 21:10:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:41,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:41,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046551799] [2024-11-21 21:10:41,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046551799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525525101] [2024-11-21 21:10:41,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:41,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:41,513 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:41,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-21 21:10:41,590 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:41,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:41,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-21 21:10:41,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525525101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:41,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:41,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-21 21:10:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748609345] [2024-11-21 21:10:41,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:41,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-21 21:10:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-21 21:10:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-21 21:10:41,751 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:41,963 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2024-11-21 21:10:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:10:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-21 21:10:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:41,964 INFO L225 Difference]: With dead ends: 116 [2024-11-21 21:10:41,965 INFO L226 Difference]: Without dead ends: 102 [2024-11-21 21:10:41,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2024-11-21 21:10:41,965 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:41,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 28 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-21 21:10:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2024-11-21 21:10:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2024-11-21 21:10:41,981 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 42 [2024-11-21 21:10:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:41,982 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2024-11-21 21:10:41,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2024-11-21 21:10:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-21 21:10:41,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:41,983 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:41,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:42,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-21 21:10:42,184 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:42,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash 545153907, now seen corresponding path program 5 times [2024-11-21 21:10:42,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:42,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637167140] [2024-11-21 21:10:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:42,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:42,201 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:10:42,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:42,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637167140] [2024-11-21 21:10:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637167140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:42,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860048623] [2024-11-21 21:10:42,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:42,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:42,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-21 21:10:42,499 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:10:42,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:42,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-21 21:10:42,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:42,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860048623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:42,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-21 21:10:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166203715] [2024-11-21 21:10:42,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:42,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-21 21:10:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-21 21:10:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:10:42,657 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:42,809 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2024-11-21 21:10:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-21 21:10:42,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-21 21:10:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:42,810 INFO L225 Difference]: With dead ends: 125 [2024-11-21 21:10:42,810 INFO L226 Difference]: Without dead ends: 67 [2024-11-21 21:10:42,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2024-11-21 21:10:42,811 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:42,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 33 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-21 21:10:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2024-11-21 21:10:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-11-21 21:10:42,818 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 44 [2024-11-21 21:10:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:42,818 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-11-21 21:10:42,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-11-21 21:10:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 21:10:42,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:42,819 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:42,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:43,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:43,020 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:43,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 9 times [2024-11-21 21:10:43,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:43,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088573060] [2024-11-21 21:10:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:43,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:43,044 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:10:43,044 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:44,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:44,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088573060] [2024-11-21 21:10:44,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088573060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:44,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469841854] [2024-11-21 21:10:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:44,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:44,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:44,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:44,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-21 21:10:45,087 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:10:45,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:45,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-21 21:10:45,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:45,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:45,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:45,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:45,260 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 26 treesize of output 21 [2024-11-21 21:10:45,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:45,363 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 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-21 21:10:45,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:45,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-21 21:10:45,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:45,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-21 21:10:45,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:46,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:46,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:46,328 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 27 treesize of output 19 [2024-11-21 21:10:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:10:46,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:46,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 114 [2024-11-21 21:10:46,530 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 154 treesize of output 103 [2024-11-21 21:10:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:46,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:48,492 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 205 treesize of output 189 [2024-11-21 21:10:48,606 INFO L349 Elim1Store]: treesize reduction 10, result has 92.8 percent of original size [2024-11-21 21:10:48,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 384615 treesize of output 378565 [2024-11-21 21:10:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469841854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:49,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:49,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32, 32] total 88 [2024-11-21 21:10:49,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127092174] [2024-11-21 21:10:49,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:49,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-21 21:10:49,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-21 21:10:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=7053, Unknown=0, NotChecked=0, Total=7656 [2024-11-21 21:10:49,114 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 88 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:51,993 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-11-21 21:10:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-21 21:10:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-21 21:10:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:51,995 INFO L225 Difference]: With dead ends: 79 [2024-11-21 21:10:51,995 INFO L226 Difference]: Without dead ends: 75 [2024-11-21 21:10:51,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1009, Invalid=11201, Unknown=0, NotChecked=0, Total=12210 [2024-11-21 21:10:51,996 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:51,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-21 21:10:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-21 21:10:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2024-11-21 21:10:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-11-21 21:10:52,007 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 48 [2024-11-21 21:10:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:52,008 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-11-21 21:10:52,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-11-21 21:10:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 21:10:52,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:52,009 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:52,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:52,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-21 21:10:52,210 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:52,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1197978547, now seen corresponding path program 6 times [2024-11-21 21:10:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:52,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950903962] [2024-11-21 21:10:52,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:52,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:52,234 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:10:52,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-21 21:10:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950903962] [2024-11-21 21:10:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950903962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006387650] [2024-11-21 21:10:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:52,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:52,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-21 21:10:52,653 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:10:52,653 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:52,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-21 21:10:52,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:52,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:52,820 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-21 21:10:52,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-21 21:10:52,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-21 21:10:53,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-21 21:10:53,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-21 21:10:53,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:53,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:53,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-21 21:10:53,430 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 16 treesize of output 12 [2024-11-21 21:10:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 3 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006387650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:53,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 19] total 41 [2024-11-21 21:10:53,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832122629] [2024-11-21 21:10:53,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:53,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-21 21:10:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-21 21:10:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2024-11-21 21:10:53,439 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:54,026 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2024-11-21 21:10:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-21 21:10:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-21 21:10:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:54,027 INFO L225 Difference]: With dead ends: 94 [2024-11-21 21:10:54,027 INFO L226 Difference]: Without dead ends: 67 [2024-11-21 21:10:54,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2024-11-21 21:10:54,029 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:54,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 78 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:10:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-21 21:10:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2024-11-21 21:10:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-11-21 21:10:54,039 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 48 [2024-11-21 21:10:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:54,039 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-11-21 21:10:54,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-11-21 21:10:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 21:10:54,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:54,040 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:54,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:54,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-21 21:10:54,241 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:54,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2064820435, now seen corresponding path program 10 times [2024-11-21 21:10:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:54,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003684542] [2024-11-21 21:10:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:54,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:54,255 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:54,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003684542] [2024-11-21 21:10:54,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003684542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055812276] [2024-11-21 21:10:54,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:54,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:54,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:54,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-21 21:10:54,562 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:54,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:54,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 21:10:54,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:54,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:54,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055812276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:54,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-11-21 21:10:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866794036] [2024-11-21 21:10:54,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:54,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 21:10:54,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 21:10:54,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:10:54,734 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:54,894 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2024-11-21 21:10:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-21 21:10:54,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-21 21:10:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:54,895 INFO L225 Difference]: With dead ends: 116 [2024-11-21 21:10:54,895 INFO L226 Difference]: Without dead ends: 66 [2024-11-21 21:10:54,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2024-11-21 21:10:54,895 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:54,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 44 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:54,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-21 21:10:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-11-21 21:10:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-11-21 21:10:54,904 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 50 [2024-11-21 21:10:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:54,904 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-11-21 21:10:54,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-11-21 21:10:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-21 21:10:54,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:54,904 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:54,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-21 21:10:55,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:55,105 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:55,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash -194210725, now seen corresponding path program 11 times [2024-11-21 21:10:55,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:55,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407853826] [2024-11-21 21:10:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:55,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:55,123 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 21:10:55,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-21 21:10:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407853826] [2024-11-21 21:10:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407853826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421202735] [2024-11-21 21:10:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:55,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:55,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-21 21:10:55,689 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 21:10:55,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:55,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 21:10:55,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:10:55,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:10:55,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421202735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:55,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-11-21 21:10:55,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362071537] [2024-11-21 21:10:55,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:55,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 21:10:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:55,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 21:10:55,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:10:55,850 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:56,009 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-21 21:10:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-21 21:10:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-21 21:10:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:56,013 INFO L225 Difference]: With dead ends: 63 [2024-11-21 21:10:56,013 INFO L226 Difference]: Without dead ends: 59 [2024-11-21 21:10:56,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2024-11-21 21:10:56,014 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:56,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 24 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-21 21:10:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-21 21:10:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-21 21:10:56,023 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2024-11-21 21:10:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:56,023 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-21 21:10:56,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-21 21:10:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:10:56,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:56,024 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:56,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-21 21:10:56,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:56,228 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:56,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1899679235, now seen corresponding path program 12 times [2024-11-21 21:10:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:56,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844641174] [2024-11-21 21:10:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:56,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:56,275 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-21 21:10:56,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 21:10:58,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:58,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844641174] [2024-11-21 21:10:58,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844641174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:58,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365597392] [2024-11-21 21:10:58,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:58,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:58,568 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:10:58,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-21 21:10:59,108 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-21 21:10:59,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:59,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-21 21:10:59,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:59,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:59,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:10:59,564 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-21 21:10:59,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 27 [2024-11-21 21:10:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:10:59,766 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-21 21:10:59,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 41 [2024-11-21 21:11:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,014 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-21 21:11:00,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 55 [2024-11-21 21:11:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,306 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-21 21:11:00,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 63 treesize of output 69 [2024-11-21 21:11:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:00,652 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-11-21 21:11:00,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 83 [2024-11-21 21:11:01,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:01,719 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 25 treesize of output 17 [2024-11-21 21:11:01,954 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 35 treesize of output 23 [2024-11-21 21:11:02,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-21 21:11:02,474 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 45 treesize of output 33 [2024-11-21 21:11:02,752 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 50 treesize of output 38 [2024-11-21 21:11:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:02,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:02,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 40 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 96 treesize of output 152 [2024-11-21 21:11:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:11:03,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:05,585 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 118 treesize of output 104 [2024-11-21 21:11:05,599 INFO L349 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2024-11-21 21:11:05,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 73 [2024-11-21 21:11:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365597392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:05,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:05,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 40, 37] total 112 [2024-11-21 21:11:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886906544] [2024-11-21 21:11:05,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:05,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-21 21:11:05,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-21 21:11:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=11117, Unknown=0, NotChecked=0, Total=12432 [2024-11-21 21:11:05,759 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 112 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:21,473 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2024-11-21 21:11:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-11-21 21:11:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-21 21:11:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:21,474 INFO L225 Difference]: With dead ends: 181 [2024-11-21 21:11:21,474 INFO L226 Difference]: Without dead ends: 175 [2024-11-21 21:11:21,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20245 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=6224, Invalid=53556, Unknown=0, NotChecked=0, Total=59780 [2024-11-21 21:11:21,477 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:21,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 227 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-21 21:11:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-21 21:11:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2024-11-21 21:11:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 111 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 149 transitions. [2024-11-21 21:11:21,500 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 149 transitions. Word has length 55 [2024-11-21 21:11:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:21,500 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 149 transitions. [2024-11-21 21:11:21,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 149 transitions. [2024-11-21 21:11:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:11:21,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:21,501 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:21,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-21 21:11:21,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:21,706 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:21,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1577639611, now seen corresponding path program 7 times [2024-11-21 21:11:21,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:21,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741280804] [2024-11-21 21:11:21,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741280804] [2024-11-21 21:11:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741280804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188530657] [2024-11-21 21:11:22,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:22,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:22,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:22,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-21 21:11:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:22,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-21 21:11:22,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:22,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:11:22,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:22,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:22,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:22,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:22,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:22,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:22,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-21 21:11:22,748 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 16 treesize of output 12 [2024-11-21 21:11:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 76 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188530657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:22,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 46 [2024-11-21 21:11:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858817598] [2024-11-21 21:11:22,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:22,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-21 21:11:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-21 21:11:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1828, Unknown=0, NotChecked=0, Total=2070 [2024-11-21 21:11:22,833 INFO L87 Difference]: Start difference. First operand 112 states and 149 transitions. Second operand has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:23,685 INFO L93 Difference]: Finished difference Result 165 states and 214 transitions. [2024-11-21 21:11:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-21 21:11:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-21 21:11:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:23,686 INFO L225 Difference]: With dead ends: 165 [2024-11-21 21:11:23,686 INFO L226 Difference]: Without dead ends: 127 [2024-11-21 21:11:23,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=4155, Unknown=0, NotChecked=0, Total=4692 [2024-11-21 21:11:23,687 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:23,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 98 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:11:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-21 21:11:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2024-11-21 21:11:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3303571428571428) internal successors, (149), 112 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2024-11-21 21:11:23,709 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 55 [2024-11-21 21:11:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:23,709 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2024-11-21 21:11:23,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2024-11-21 21:11:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:11:23,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:23,710 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:23,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-21 21:11:23,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-21 21:11:23,912 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:23,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 589849727, now seen corresponding path program 8 times [2024-11-21 21:11:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:23,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196141483] [2024-11-21 21:11:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:23,956 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:23,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 86 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196141483] [2024-11-21 21:11:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196141483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629076452] [2024-11-21 21:11:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:24,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:24,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:24,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-21 21:11:24,620 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:24,620 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:24,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-21 21:11:24,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:24,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:11:24,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:24,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:24,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:24,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:24,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 21:11:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-21 21:11:24,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:25,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-21 21:11:25,083 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 42 treesize of output 38 [2024-11-21 21:11:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-21 21:11:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629076452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:25,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:25,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 16] total 42 [2024-11-21 21:11:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815637452] [2024-11-21 21:11:25,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:25,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-21 21:11:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-21 21:11:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-11-21 21:11:25,177 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:25,948 INFO L93 Difference]: Finished difference Result 165 states and 214 transitions. [2024-11-21 21:11:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-21 21:11:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-21 21:11:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:25,949 INFO L225 Difference]: With dead ends: 165 [2024-11-21 21:11:25,949 INFO L226 Difference]: Without dead ends: 88 [2024-11-21 21:11:25,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2024-11-21 21:11:25,950 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:25,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 149 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:11:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-21 21:11:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2024-11-21 21:11:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 76 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2024-11-21 21:11:25,966 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 55 [2024-11-21 21:11:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:25,966 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2024-11-21 21:11:25,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2024-11-21 21:11:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-21 21:11:25,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:25,967 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:25,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-21 21:11:26,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-21 21:11:26,172 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:26,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash -177410273, now seen corresponding path program 13 times [2024-11-21 21:11:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016933911] [2024-11-21 21:11:26,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-21 21:11:26,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016933911] [2024-11-21 21:11:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016933911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978280171] [2024-11-21 21:11:26,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:26,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:26,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:26,326 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:26,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-21 21:11:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:26,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-21 21:11:26,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-21 21:11:26,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-21 21:11:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978280171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:26,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-21 21:11:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082967888] [2024-11-21 21:11:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:26,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:11:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:11:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:11:26,698 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:26,922 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2024-11-21 21:11:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-21 21:11:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-21 21:11:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:26,923 INFO L225 Difference]: With dead ends: 178 [2024-11-21 21:11:26,923 INFO L226 Difference]: Without dead ends: 103 [2024-11-21 21:11:26,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-21 21:11:26,924 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 158 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:26,924 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 33 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:11:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-21 21:11:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2024-11-21 21:11:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2024-11-21 21:11:26,941 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 57 [2024-11-21 21:11:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:26,942 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2024-11-21 21:11:26,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2024-11-21 21:11:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-21 21:11:26,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:26,942 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:26,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-21 21:11:27,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:27,143 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:27,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1418312717, now seen corresponding path program 9 times [2024-11-21 21:11:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808106467] [2024-11-21 21:11:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:11:27,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:27,184 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-21 21:11:27,184 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-21 21:11:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808106467] [2024-11-21 21:11:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808106467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315477612] [2024-11-21 21:11:27,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:11:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:27,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:27,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-21 21:11:27,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-21 21:11:27,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:27,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-21 21:11:27,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-21 21:11:27,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-21 21:11:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315477612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:27,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:27,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-21 21:11:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490989273] [2024-11-21 21:11:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:27,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:11:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:11:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:11:27,880 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:28,217 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2024-11-21 21:11:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 21:11:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-21 21:11:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:28,218 INFO L225 Difference]: With dead ends: 102 [2024-11-21 21:11:28,218 INFO L226 Difference]: Without dead ends: 98 [2024-11-21 21:11:28,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-11-21 21:11:28,219 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 86 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:28,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 40 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:11:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-21 21:11:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2024-11-21 21:11:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-11-21 21:11:28,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2024-11-21 21:11:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:28,253 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-11-21 21:11:28,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-11-21 21:11:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-21 21:11:28,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:28,254 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:28,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-21 21:11:28,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:28,457 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:28,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1328267249, now seen corresponding path program 14 times [2024-11-21 21:11:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805849624] [2024-11-21 21:11:28,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:28,486 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:28,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:11:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805849624] [2024-11-21 21:11:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805849624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823954247] [2024-11-21 21:11:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:32,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-21 21:11:32,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:32,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:32,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-21 21:11:32,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:32,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:11:32,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:33,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,057 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 26 treesize of output 21 [2024-11-21 21:11:33,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,218 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 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-21 21:11:33,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-21 21:11:33,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-21 21:11:33,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-21 21:11:33,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 71 [2024-11-21 21:11:34,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:34,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:34,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:34,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:34,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:34,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:35,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-21 21:11:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:11:35,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:39,519 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 533 treesize of output 505 [2024-11-21 21:11:40,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:40,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 11969377079095593 treesize of output 11855027869807275 [2024-11-21 21:11:45,568 WARN L286 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 4674 DAG size of output: 210 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)