./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s3lif.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/s3lif.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 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 21:10:22,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 21:10:22,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 21:10:22,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 21:10:22,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 21:10:22,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 21:10:22,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 21:10:22,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 21:10:22,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 21:10:22,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 21:10:22,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 21:10:22,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 21:10:22,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 21:10:22,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 21:10:22,853 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 21:10:22,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 21:10:22,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 21:10:22,853 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 21:10:22,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 21:10:22,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 21:10:22,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 21:10:22,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 21:10:22,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 21:10:22,855 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 21:10:22,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 21:10:22,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 21:10:22,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 21:10:22,856 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 21:10:22,856 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 21:10:22,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 21:10:22,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 21:10:22,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 21:10:22,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:10:22,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 21:10:22,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 21:10:22,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 21:10:22,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 21:10:22,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 21:10:22,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 21:10:22,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 21:10:22,859 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 21:10:22,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 21:10:22,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a [2024-11-21 21:10:23,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 21:10:23,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 21:10:23,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 21:10:23,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 21:10:23,079 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 21:10:23,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s3lif.c [2024-11-21 21:10:24,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 21:10:24,435 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 21:10:24,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s3lif.c [2024-11-21 21:10:24,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd8084eb/464de6b20cf0487e99b7e71d1a5cb2c4/FLAGf0939803f [2024-11-21 21:10:24,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd8084eb/464de6b20cf0487e99b7e71d1a5cb2c4 [2024-11-21 21:10:24,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 21:10:24,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 21:10:24,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 21:10:24,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 21:10:24,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 21:10:24,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:10:24" (1/1) ... [2024-11-21 21:10:24,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7675ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:24, skipping insertion in model container [2024-11-21 21:10:24,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:10:24" (1/1) ... [2024-11-21 21:10:24,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 21:10:25,016 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/s3lif.c[588,601] [2024-11-21 21:10:25,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:10:25,042 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 21:10:25,062 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/s3lif.c[588,601] [2024-11-21 21:10:25,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 21:10:25,078 INFO L204 MainTranslator]: Completed translation [2024-11-21 21:10:25,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25 WrapperNode [2024-11-21 21:10:25,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 21:10:25,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 21:10:25,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 21:10:25,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 21:10:25,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,104 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-11-21 21:10:25,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 21:10:25,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 21:10:25,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 21:10:25,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 21:10:25,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,125 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 4, 7]. 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, 2, 3]. [2024-11-21 21:10:25,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 21:10:25,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 21:10:25,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 21:10:25,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 21:10:25,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (1/1) ... [2024-11-21 21:10:25,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 21:10:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:25,163 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 21:10:25,166 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 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-21 21:10:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 21:10:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 21:10:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 21:10:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 21:10:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-21 21:10:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 21:10:25,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-21 21:10:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 21:10:25,273 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 21:10:25,275 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 21:10:25,413 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-21 21:10:25,413 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 21:10:25,422 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 21:10:25,422 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 21:10:25,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:10:25 BoogieIcfgContainer [2024-11-21 21:10:25,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 21:10:25,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 21:10:25,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 21:10:25,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 21:10:25,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:10:24" (1/3) ... [2024-11-21 21:10:25,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0cd2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:10:25, skipping insertion in model container [2024-11-21 21:10:25,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:10:25" (2/3) ... [2024-11-21 21:10:25,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0cd2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:10:25, skipping insertion in model container [2024-11-21 21:10:25,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:10:25" (3/3) ... [2024-11-21 21:10:25,431 INFO L112 eAbstractionObserver]: Analyzing ICFG s3lif.c [2024-11-21 21:10:25,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 21:10:25,445 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 21:10:25,492 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 21:10:25,496 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;@29bd3f99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 21:10:25,497 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 21:10:25,499 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 21:10:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 21:10:25,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:25,503 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:25,504 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:25,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2024-11-21 21:10:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816751103] [2024-11-21 21:10:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:25,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:25,636 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 21:10:25,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:25,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816751103] [2024-11-21 21:10:25,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816751103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:10:25,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:10:25,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 21:10:25,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611983393] [2024-11-21 21:10:25,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:10:25,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 21:10:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 21:10:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 21:10:25,668 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 21:10:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:25,676 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-21 21:10:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 21:10:25,678 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 21:10:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:25,682 INFO L225 Difference]: With dead ends: 40 [2024-11-21 21:10:25,682 INFO L226 Difference]: Without dead ends: 18 [2024-11-21 21:10:25,684 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 21:10:25,686 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 21:10:25,686 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 21:10:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-21 21:10:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-21 21:10:25,704 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 21:10:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-21 21:10:25,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-21 21:10:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:25,706 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-21 21:10:25,706 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 21:10:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-21 21:10:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 21:10:25,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:25,707 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:25,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 21:10:25,707 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:25,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2024-11-21 21:10:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:25,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514284719] [2024-11-21 21:10:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:25,850 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 21:10:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514284719] [2024-11-21 21:10:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514284719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 21:10:25,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 21:10:25,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 21:10:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164719378] [2024-11-21 21:10:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 21:10:25,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 21:10:25,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 21:10:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-21 21:10:25,852 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 21:10:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:25,916 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-21 21:10:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 21:10:25,917 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 21:10:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:25,917 INFO L225 Difference]: With dead ends: 36 [2024-11-21 21:10:25,918 INFO L226 Difference]: Without dead ends: 25 [2024-11-21 21:10:25,918 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 21:10:25,919 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:25,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-21 21:10:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-21 21:10:25,924 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 21:10:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-21 21:10:25,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-21 21:10:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:25,925 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-21 21:10:25,925 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 21:10:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-21 21:10:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:10:25,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:25,926 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 21:10:25,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 21:10:25,926 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:25,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2024-11-21 21:10:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:25,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047729944] [2024-11-21 21:10:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:25,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:26,630 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 21:10:26,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:26,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047729944] [2024-11-21 21:10:26,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047729944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:26,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972688936] [2024-11-21 21:10:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:26,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:26,635 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 21:10:26,637 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 21:10:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:26,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-21 21:10:26,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:26,737 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 21:10:26,860 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 21:10:26,947 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 21:10:26,986 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 21:10:26,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:27,071 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 21:10:27,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:27,085 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 21:10:27,201 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 21:10:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972688936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:27,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:27,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2024-11-21 21:10:27,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510497454] [2024-11-21 21:10:27,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:27,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-21 21:10:27,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-21 21:10:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-21 21:10:27,206 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 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 21:10:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:27,534 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-21 21:10:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:10:27,535 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 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 21:10:27,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:27,536 INFO L225 Difference]: With dead ends: 46 [2024-11-21 21:10:27,536 INFO L226 Difference]: Without dead ends: 42 [2024-11-21 21:10:27,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2024-11-21 21:10:27,538 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:27,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:10:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-21 21:10:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-11-21 21:10:27,543 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 21:10:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-21 21:10:27,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2024-11-21 21:10:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:27,543 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-21 21:10:27,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 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 21:10:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-21 21:10:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-21 21:10:27,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:27,544 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 21:10:27,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:27,748 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 21:10:27,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:27,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2024-11-21 21:10:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35524346] [2024-11-21 21:10:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:27,924 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 21:10:27,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35524346] [2024-11-21 21:10:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35524346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926338847] [2024-11-21 21:10:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:27,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:27,929 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 21:10:27,931 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 21:10:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:27,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-21 21:10:27,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:27,988 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 21:10:28,008 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 21:10:28,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:28,030 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 21:10:28,033 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 21:10:28,043 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 21:10:28,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926338847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:28,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:28,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-21 21:10:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442066260] [2024-11-21 21:10:28,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:28,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-21 21:10:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-21 21:10:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-21 21:10:28,045 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 21:10:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:28,112 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-21 21:10:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-21 21:10:28,112 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 21:10:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:28,112 INFO L225 Difference]: With dead ends: 48 [2024-11-21 21:10:28,113 INFO L226 Difference]: Without dead ends: 37 [2024-11-21 21:10:28,113 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 21:10:28,113 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:28,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 21:10:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-21 21:10:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-11-21 21:10:28,117 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 21:10:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-21 21:10:28,118 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2024-11-21 21:10:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:28,118 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-21 21:10:28,118 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 21:10:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-21 21:10:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 21:10:28,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:28,119 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 21:10:28,128 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 21:10:28,319 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 21:10:28,319 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:28,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2024-11-21 21:10:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:28,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952715457] [2024-11-21 21:10:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:28,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:28,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:28,403 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 21:10:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952715457] [2024-11-21 21:10:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952715457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707405222] [2024-11-21 21:10:28,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:28,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:28,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:28,406 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 21:10:28,407 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 21:10:28,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:28,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:28,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:10:28,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:28,502 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 21:10:28,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:28,538 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 21:10:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707405222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:28,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:10:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213299112] [2024-11-21 21:10:28,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:28,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:10:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:10:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:10:28,540 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 21:10:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:28,619 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-11-21 21:10:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-21 21:10:28,620 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 21:10:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:28,620 INFO L225 Difference]: With dead ends: 66 [2024-11-21 21:10:28,620 INFO L226 Difference]: Without dead ends: 40 [2024-11-21 21:10:28,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:10:28,621 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:28,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-21 21:10:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-21 21:10:28,625 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 21:10:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-21 21:10:28,625 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2024-11-21 21:10:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:28,626 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-21 21:10:28,626 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 21:10:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-21 21:10:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 21:10:28,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:28,626 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 21:10:28,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-21 21:10:28,830 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 21:10:28,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:28,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2024-11-21 21:10:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561828249] [2024-11-21 21:10:28,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:28,845 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 21:10:28,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:29,223 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 21:10:29,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561828249] [2024-11-21 21:10:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561828249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378494756] [2024-11-21 21:10:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:29,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:29,226 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 21:10:29,227 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 21:10:29,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 21:10:29,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:29,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-21 21:10:29,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:29,327 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 21:10:29,453 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 21:10:29,561 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 21:10:29,650 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 21:10:29,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:29,782 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 21:10:29,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:29,792 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 21:10:29,875 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 21:10:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378494756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:29,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2024-11-21 21:10:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922364778] [2024-11-21 21:10:29,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:29,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-21 21:10:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-21 21:10:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2024-11-21 21:10:29,877 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 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 21:10:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:30,433 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-11-21 21:10:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 21:10:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 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 21:10:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:30,434 INFO L225 Difference]: With dead ends: 50 [2024-11-21 21:10:30,434 INFO L226 Difference]: Without dead ends: 41 [2024-11-21 21:10:30,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2024-11-21 21:10:30,436 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 93 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:30,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 47 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:10:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-21 21:10:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2024-11-21 21:10:30,441 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 21:10:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-21 21:10:30,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2024-11-21 21:10:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:30,441 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-21 21:10:30,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 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 21:10:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-21 21:10:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-21 21:10:30,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:30,442 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 21:10:30,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:30,642 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 21:10:30,642 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:30,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1447181833, now seen corresponding path program 1 times [2024-11-21 21:10:30,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:30,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611557622] [2024-11-21 21:10:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:30,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:30,700 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 21:10:30,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611557622] [2024-11-21 21:10:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611557622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695080140] [2024-11-21 21:10:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 21:10:30,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:30,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:30,702 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 21:10:30,704 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 21:10:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:30,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-21 21:10:30,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:30,805 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 21:10:30,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:30,847 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 21:10:30,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695080140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:30,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:30,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-21 21:10:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629349427] [2024-11-21 21:10:30,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:30,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-21 21:10:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-21 21:10:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-21 21:10:30,849 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 21:10:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:30,927 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-11-21 21:10:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-21 21:10:30,927 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 21:10:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:30,928 INFO L225 Difference]: With dead ends: 43 [2024-11-21 21:10:30,928 INFO L226 Difference]: Without dead ends: 39 [2024-11-21 21:10:30,928 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 21:10:30,929 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:30,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-21 21:10:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2024-11-21 21:10:30,936 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 21:10:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-21 21:10:30,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2024-11-21 21:10:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:30,937 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-21 21:10:30,937 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 21:10:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-21 21:10:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:10:30,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:30,937 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 21:10:30,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:31,138 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 21:10:31,138 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:31,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2024-11-21 21:10:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354091491] [2024-11-21 21:10:31,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:31,155 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:31,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:31,961 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 21:10:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354091491] [2024-11-21 21:10:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354091491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362618793] [2024-11-21 21:10:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:31,964 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 21:10:31,964 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 21:10:32,016 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:32,016 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:32,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-21 21:10:32,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:32,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-21 21:10:32,184 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 21:10:32,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:32,296 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 21:10:32,375 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 21:10:32,468 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 21:10:32,514 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 21:10:32,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:32,817 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 21:10:32,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:32,836 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 386 treesize of output 383 [2024-11-21 21:10:33,101 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 21:10:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362618793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:33,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 49 [2024-11-21 21:10:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867493447] [2024-11-21 21:10:33,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:33,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-21 21:10:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-21 21:10:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 21:10:33,103 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 21:10:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:34,622 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-11-21 21:10:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-21 21:10:34,622 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 21:10:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:34,623 INFO L225 Difference]: With dead ends: 87 [2024-11-21 21:10:34,623 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:10:34,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=911, Invalid=5569, Unknown=0, NotChecked=0, Total=6480 [2024-11-21 21:10:34,626 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:34,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 115 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 21:10:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:10:34,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2024-11-21 21:10:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 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 21:10:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-11-21 21:10:34,633 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2024-11-21 21:10:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:34,633 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-11-21 21:10:34,633 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 21:10:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-11-21 21:10:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 21:10:34,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:34,633 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 21:10:34,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:34,837 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 21:10:34,838 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:34,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:34,838 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 2 times [2024-11-21 21:10:34,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:34,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983060824] [2024-11-21 21:10:34,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:34,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:34,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,103 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 21:10:35,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983060824] [2024-11-21 21:10:35,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983060824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:35,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504609875] [2024-11-21 21:10:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:35,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:35,104 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 21:10:35,105 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 21:10:35,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:35,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-21 21:10:35,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:35,168 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 21:10:35,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:35,204 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 25 treesize of output 20 [2024-11-21 21:10:35,229 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 21:10:35,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:35,267 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 21:10:35,268 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 21:10:35,287 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 21:10:35,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504609875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:35,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:35,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-11-21 21:10:35,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5114346] [2024-11-21 21:10:35,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:35,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-21 21:10:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-21 21:10:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:10:35,289 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 21:10:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:35,437 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-11-21 21:10:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:10:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 21:10:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:35,438 INFO L225 Difference]: With dead ends: 80 [2024-11-21 21:10:35,438 INFO L226 Difference]: Without dead ends: 55 [2024-11-21 21:10:35,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-11-21 21:10:35,440 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:35,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-21 21:10:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-21 21:10:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 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 21:10:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-21 21:10:35,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 27 [2024-11-21 21:10:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:35,447 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-21 21:10:35,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 21:10:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-21 21:10:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 21:10:35,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:35,447 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 21:10:35,454 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 21:10:35,648 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 21:10:35,648 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:35,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2024-11-21 21:10:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:35,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721498562] [2024-11-21 21:10:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:35,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:35,661 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:10:35,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,744 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 21:10:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:35,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721498562] [2024-11-21 21:10:35,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721498562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:35,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751813461] [2024-11-21 21:10:35,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:35,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:35,746 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 21:10:35,747 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 21:10:35,809 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-21 21:10:35,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:35,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:10:35,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:35,866 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 21:10:35,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:35,903 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 21:10:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751813461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:35,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-21 21:10:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841476456] [2024-11-21 21:10:35,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:35,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-21 21:10:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:35,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-21 21:10:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-21 21:10:35,904 INFO L87 Difference]: Start difference. First operand 49 states and 58 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 21:10:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:36,011 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-21 21:10:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 21:10:36,011 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 21:10:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:36,011 INFO L225 Difference]: With dead ends: 85 [2024-11-21 21:10:36,011 INFO L226 Difference]: Without dead ends: 49 [2024-11-21 21:10:36,012 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 21:10:36,012 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:36,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-21 21:10:36,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2024-11-21 21:10:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-21 21:10:36,021 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2024-11-21 21:10:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:36,021 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-21 21:10:36,021 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 21:10:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-21 21:10:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 21:10:36,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:36,022 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 21:10:36,029 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 21:10:36,222 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 21:10:36,223 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:36,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2024-11-21 21:10:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330830187] [2024-11-21 21:10:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:36,236 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 21:10:36,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 21:10:36,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330830187] [2024-11-21 21:10:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330830187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611187587] [2024-11-21 21:10:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:36,298 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 21:10:36,299 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 21:10:36,354 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 21:10:36,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:36,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 21:10:36,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:36,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-21 21:10:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611187587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:36,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:36,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-21 21:10:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642094628] [2024-11-21 21:10:36,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:36,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 21:10:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 21:10:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-21 21:10:36,459 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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 21:10:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:36,546 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2024-11-21 21:10:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:10:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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 21:10:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:36,547 INFO L225 Difference]: With dead ends: 48 [2024-11-21 21:10:36,547 INFO L226 Difference]: Without dead ends: 38 [2024-11-21 21:10:36,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 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 21:10:36,548 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:36,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-21 21:10:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-21 21:10:36,553 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 21:10:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-21 21:10:36,553 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2024-11-21 21:10:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:36,553 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-21 21:10:36,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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 21:10:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-21 21:10:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 21:10:36,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:36,554 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 21:10:36,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:36,758 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 21:10:36,759 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:36,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2024-11-21 21:10:36,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:36,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106993061] [2024-11-21 21:10:36,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:36,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:37,955 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 21:10:37,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106993061] [2024-11-21 21:10:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106993061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550164154] [2024-11-21 21:10:37,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:37,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:37,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:37,957 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 21:10:37,958 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 21:10:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:38,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-21 21:10:38,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:38,029 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 21:10:38,147 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 21:10:38,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:38,244 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 21:10:38,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:38,350 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 21:10:38,456 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 21:10:38,542 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 21:10:38,623 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 21:10:38,676 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 21:10:38,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:39,220 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 21:10:39,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:39,249 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 11813 treesize of output 11231 [2024-11-21 21:10:39,598 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 21:10:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550164154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:39,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:39,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 63 [2024-11-21 21:10:39,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682872465] [2024-11-21 21:10:39,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:39,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-21 21:10:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-21 21:10:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=3471, Unknown=0, NotChecked=0, Total=3906 [2024-11-21 21:10:39,600 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 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 21:10:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:40,811 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2024-11-21 21:10:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-21 21:10:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 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 21:10:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:40,812 INFO L225 Difference]: With dead ends: 84 [2024-11-21 21:10:40,812 INFO L226 Difference]: Without dead ends: 70 [2024-11-21 21:10:40,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=750, Invalid=5256, Unknown=0, NotChecked=0, Total=6006 [2024-11-21 21:10:40,813 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:40,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 146 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-21 21:10:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-21 21:10:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2024-11-21 21:10:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 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 21:10:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-21 21:10:40,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2024-11-21 21:10:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:40,821 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-21 21:10:40,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 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 21:10:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-21 21:10:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 21:10:40,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:40,821 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 21:10:40,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:41,022 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 21:10:41,022 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:41,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 3 times [2024-11-21 21:10:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:41,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234665044] [2024-11-21 21:10:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:41,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:41,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:41,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234665044] [2024-11-21 21:10:41,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234665044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:41,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077727320] [2024-11-21 21:10:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:41,285 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 21:10:41,286 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 21:10:41,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:41,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:41,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-21 21:10:41,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:41,408 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 21:10:41,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:41,461 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 25 treesize of output 20 [2024-11-21 21:10:41,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:41,491 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 25 treesize of output 20 [2024-11-21 21:10:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:41,580 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 21:10:41,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-21 21:10:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077727320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:41,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 29 [2024-11-21 21:10:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983740920] [2024-11-21 21:10:41,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:41,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-21 21:10:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-21 21:10:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-11-21 21:10:41,610 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 21:10:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:41,934 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2024-11-21 21:10:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-21 21:10:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 34 [2024-11-21 21:10:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:41,935 INFO L225 Difference]: With dead ends: 82 [2024-11-21 21:10:41,936 INFO L226 Difference]: Without dead ends: 67 [2024-11-21 21:10:41,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=1832, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 21:10:41,936 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:41,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-21 21:10:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2024-11-21 21:10:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 60 states have internal predecessors, (70), 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 21:10:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2024-11-21 21:10:41,948 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 34 [2024-11-21 21:10:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:41,948 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2024-11-21 21:10:41,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 21:10:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2024-11-21 21:10:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-21 21:10:41,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:41,949 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:41,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:42,153 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 21:10:42,153 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:42,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2024-11-21 21:10:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:42,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50062436] [2024-11-21 21:10:42,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:42,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:42,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:10:42,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50062436] [2024-11-21 21:10:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50062436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573652956] [2024-11-21 21:10:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:10:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:42,247 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 21:10:42,248 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 21:10:42,311 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:10:42,311 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:42,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-21 21:10:42,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:10:42,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-21 21:10:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573652956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:42,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:42,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-21 21:10:42,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305078771] [2024-11-21 21:10:42,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:42,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-21 21:10:42,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-21 21:10:42,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-21 21:10:42,425 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 21:10:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:42,529 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2024-11-21 21:10:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 21:10:42,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 36 [2024-11-21 21:10:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:42,530 INFO L225 Difference]: With dead ends: 100 [2024-11-21 21:10:42,530 INFO L226 Difference]: Without dead ends: 60 [2024-11-21 21:10:42,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:10:42,530 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:42,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-21 21:10:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2024-11-21 21:10:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 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 21:10:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-21 21:10:42,538 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 36 [2024-11-21 21:10:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:42,538 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-21 21:10:42,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 21:10:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-21 21:10:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-21 21:10:42,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:42,539 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:42,546 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 21:10:42,739 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 21:10:42,739 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:42,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2024-11-21 21:10:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671601940] [2024-11-21 21:10:42,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:42,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:42,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:42,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:43,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:43,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671601940] [2024-11-21 21:10:43,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671601940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:43,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170463583] [2024-11-21 21:10:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:10:43,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:43,518 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 21:10:43,519 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 21:10:43,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 21:10:43,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:43,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-21 21:10:43,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:43,590 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 21:10:43,657 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 21:10:43,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:43,719 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 21:10:43,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:43,795 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 21:10:43,987 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 21:10:44,067 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 21:10:44,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:44,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 47 [2024-11-21 21:10:44,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-21 21:10:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:44,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:44,760 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 109 treesize of output 99 [2024-11-21 21:10:44,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:44,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1543 treesize of output 1529 [2024-11-21 21:10:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:44,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170463583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:44,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:44,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2024-11-21 21:10:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887604783] [2024-11-21 21:10:44,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:44,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-21 21:10:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-21 21:10:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2783, Unknown=0, NotChecked=0, Total=3080 [2024-11-21 21:10:44,931 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 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 21:10:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:45,684 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2024-11-21 21:10:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-21 21:10:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 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) Word has length 36 [2024-11-21 21:10:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:45,685 INFO L225 Difference]: With dead ends: 56 [2024-11-21 21:10:45,685 INFO L226 Difference]: Without dead ends: 44 [2024-11-21 21:10:45,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=4199, Unknown=0, NotChecked=0, Total=4692 [2024-11-21 21:10:45,686 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:45,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:10:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-21 21:10:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-21 21:10:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 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 21:10:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-21 21:10:45,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2024-11-21 21:10:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:45,692 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-21 21:10:45,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 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 21:10:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-21 21:10:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-21 21:10:45,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:45,693 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:45,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-21 21:10:45,893 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 21:10:45,893 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:45,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash 975408915, now seen corresponding path program 10 times [2024-11-21 21:10:45,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:45,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017964120] [2024-11-21 21:10:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:45,902 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:45,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017964120] [2024-11-21 21:10:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017964120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199037591] [2024-11-21 21:10:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:45,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:45,974 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 21:10:45,976 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 21:10:46,037 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:46,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:46,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-21 21:10:46,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:46,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:46,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199037591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:46,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-11-21 21:10:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131079128] [2024-11-21 21:10:46,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:46,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-21 21:10:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-21 21:10:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-21 21:10:46,153 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 21:10:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:46,316 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2024-11-21 21:10:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-21 21:10:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 39 [2024-11-21 21:10:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:46,317 INFO L225 Difference]: With dead ends: 51 [2024-11-21 21:10:46,317 INFO L226 Difference]: Without dead ends: 47 [2024-11-21 21:10:46,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-11-21 21:10:46,318 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:46,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 27 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-21 21:10:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-21 21:10:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 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 21:10:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-11-21 21:10:46,327 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 39 [2024-11-21 21:10:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:46,328 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-11-21 21:10:46,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 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 21:10:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-11-21 21:10:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-21 21:10:46,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:46,329 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 21:10:46,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-21 21:10:46,529 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 21:10:46,530 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:46,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 11 times [2024-11-21 21:10:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804997568] [2024-11-21 21:10:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:46,563 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 21:10:46,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:47,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804997568] [2024-11-21 21:10:47,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804997568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842574534] [2024-11-21 21:10:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:10:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:47,583 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 21:10:47,584 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 21:10:47,692 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 21:10:47,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:47,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-21 21:10:47,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:47,704 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 21:10:47,742 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 21:10:47,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:47,809 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 21:10:47,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:47,909 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 21:10:48,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:48,022 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 21:10:48,131 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 21:10:48,214 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 21:10:48,300 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 21:10:48,389 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 21:10:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 21:10:48,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:49,506 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 210 treesize of output 194 [2024-11-21 21:10:49,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:49,576 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 1285616 treesize of output 1228385 [2024-11-21 21:10:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842574534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:49,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:49,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-11-21 21:10:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984732033] [2024-11-21 21:10:49,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:49,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-21 21:10:49,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-21 21:10:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4300, Unknown=0, NotChecked=0, Total=4692 [2024-11-21 21:10:49,875 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 69 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 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 21:10:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:51,214 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-11-21 21:10:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-21 21:10:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 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 21:10:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:51,215 INFO L225 Difference]: With dead ends: 65 [2024-11-21 21:10:51,215 INFO L226 Difference]: Without dead ends: 61 [2024-11-21 21:10:51,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=740, Invalid=7450, Unknown=0, NotChecked=0, Total=8190 [2024-11-21 21:10:51,218 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:51,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 168 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 21:10:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-21 21:10:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2024-11-21 21:10:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:10:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-21 21:10:51,229 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 41 [2024-11-21 21:10:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:51,230 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-21 21:10:51,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 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 21:10:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-21 21:10:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-21 21:10:51,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:51,231 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:51,240 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 21:10:51,431 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 21:10:51,431 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:51,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 12 times [2024-11-21 21:10:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221260389] [2024-11-21 21:10:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:51,449 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:10:51,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:51,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221260389] [2024-11-21 21:10:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221260389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978203893] [2024-11-21 21:10:51,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:10:51,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:51,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:51,548 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 21:10:51,549 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 21:10:51,642 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:10:51,642 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:51,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-21 21:10:51,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:51,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:10:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978203893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:51,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-21 21:10:51,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409471733] [2024-11-21 21:10:51,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:51,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-21 21:10:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-21 21:10:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:10:51,767 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 21:10:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:51,879 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2024-11-21 21:10:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 21:10:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 43 [2024-11-21 21:10:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:51,880 INFO L225 Difference]: With dead ends: 123 [2024-11-21 21:10:51,880 INFO L226 Difference]: Without dead ends: 74 [2024-11-21 21:10:51,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-21 21:10:51,881 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:51,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-21 21:10:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2024-11-21 21:10:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 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 21:10:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-21 21:10:51,889 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2024-11-21 21:10:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:51,889 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-21 21:10:51,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 21:10:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-21 21:10:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-21 21:10:51,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:51,890 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:10:51,897 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 21:10:52,090 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 21:10:52,091 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:52,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 803144653, now seen corresponding path program 4 times [2024-11-21 21:10:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371012903] [2024-11-21 21:10:52,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:52,101 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:52,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371012903] [2024-11-21 21:10:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371012903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558875213] [2024-11-21 21:10:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:10:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:52,197 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 21:10:52,203 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 21:10:52,274 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:10:52,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:10:52,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-21 21:10:52,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:52,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:10:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558875213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:52,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:52,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-21 21:10:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121950162] [2024-11-21 21:10:52,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:52,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-21 21:10:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-21 21:10:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-21 21:10:52,415 INFO L87 Difference]: Start difference. First operand 55 states and 61 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 21:10:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:10:52,601 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2024-11-21 21:10:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:10:52,601 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 46 [2024-11-21 21:10:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:10:52,602 INFO L225 Difference]: With dead ends: 73 [2024-11-21 21:10:52,602 INFO L226 Difference]: Without dead ends: 69 [2024-11-21 21:10:52,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2024-11-21 21:10:52,603 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:10:52,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:10:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-21 21:10:52,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2024-11-21 21:10:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 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 21:10:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-11-21 21:10:52,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2024-11-21 21:10:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:10:52,612 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-11-21 21:10:52,612 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 21:10:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-11-21 21:10:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 21:10:52,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:10:52,612 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 21:10:52,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-21 21:10:52,813 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 21:10:52,813 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:10:52,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:10:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 13 times [2024-11-21 21:10:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:10:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774387686] [2024-11-21 21:10:52,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:10:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:10:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774387686] [2024-11-21 21:10:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774387686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:10:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037245246] [2024-11-21 21:10:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:10:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:10:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:10:55,179 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 21:10:55,180 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 21:10:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:10:55,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-21 21:10:55,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:10:55,270 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 21:10:55,521 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 21:10:55,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:55,629 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 21:10:55,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:55,754 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 21:10:55,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:55,906 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 21:10:56,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:56,100 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 21:10:56,236 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 21:10:56,357 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 21:10:56,480 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 21:10:56,594 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 21:10:56,711 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 21:10:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:56,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:10:58,486 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 303 treesize of output 283 [2024-11-21 21:10:58,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:10:58,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 816903787 treesize of output 798029605 [2024-11-21 21:10:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 21:10:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037245246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:10:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:10:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 102 [2024-11-21 21:10:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534933234] [2024-11-21 21:10:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:10:59,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-21 21:10:59,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:10:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-21 21:10:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=983, Invalid=9319, Unknown=0, NotChecked=0, Total=10302 [2024-11-21 21:10:59,946 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 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 21:11:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:08,046 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2024-11-21 21:11:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-21 21:11:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 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 21:11:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:08,047 INFO L225 Difference]: With dead ends: 160 [2024-11-21 21:11:08,047 INFO L226 Difference]: Without dead ends: 141 [2024-11-21 21:11:08,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7584 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2367, Invalid=21813, Unknown=0, NotChecked=0, Total=24180 [2024-11-21 21:11:08,049 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:08,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 198 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-21 21:11:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-21 21:11:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 89. [2024-11-21 21:11:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 88 states have internal predecessors, (107), 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 21:11:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-11-21 21:11:08,072 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 48 [2024-11-21 21:11:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:08,073 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-11-21 21:11:08,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 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 21:11:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-11-21 21:11:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 21:11:08,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:08,073 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 21:11:08,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:08,274 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 21:11:08,274 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:08,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1218867985, now seen corresponding path program 5 times [2024-11-21 21:11:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:08,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282570991] [2024-11-21 21:11:08,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:11:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:08,296 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:11:08,297 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:11:08,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282570991] [2024-11-21 21:11:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282570991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:08,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105529627] [2024-11-21 21:11:08,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:11:08,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:08,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:08,665 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 21:11:08,666 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 21:11:09,267 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-21 21:11:09,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:09,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-21 21:11:09,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:09,280 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 21:11:09,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:09,292 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 1 case distinctions, treesize of input 27 treesize of output 22 [2024-11-21 21:11:09,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:09,301 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 1 case distinctions, treesize of input 31 treesize of output 24 [2024-11-21 21:11:09,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:09,313 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 1 case distinctions, treesize of input 31 treesize of output 24 [2024-11-21 21:11:09,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:09,326 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 1 case distinctions, treesize of input 31 treesize of output 24 [2024-11-21 21:11:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:11:09,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:09,421 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 21:11:09,423 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 21:11:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:11:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105529627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:09,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:09,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-11-21 21:11:09,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192403768] [2024-11-21 21:11:09,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:09,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-21 21:11:09,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-21 21:11:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-21 21:11:09,433 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 21:11:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:09,670 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2024-11-21 21:11:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 21:11:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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) Word has length 48 [2024-11-21 21:11:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:09,670 INFO L225 Difference]: With dead ends: 120 [2024-11-21 21:11:09,670 INFO L226 Difference]: Without dead ends: 101 [2024-11-21 21:11:09,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:11:09,671 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:09,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 21:11:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-21 21:11:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2024-11-21 21:11:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 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 21:11:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-11-21 21:11:09,687 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 48 [2024-11-21 21:11:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:09,687 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-11-21 21:11:09,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 21:11:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-11-21 21:11:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-21 21:11:09,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:09,687 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 21:11:09,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:09,887 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 21:11:09,888 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:09,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1197978547, now seen corresponding path program 6 times [2024-11-21 21:11:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128181358] [2024-11-21 21:11:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:11:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:09,906 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:11:09,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-21 21:11:10,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128181358] [2024-11-21 21:11:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128181358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941887942] [2024-11-21 21:11:10,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:11:10,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:10,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:10,140 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 21:11:10,140 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 21:11:10,296 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-21 21:11:10,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:10,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-21 21:11:10,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:10,358 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 21:11:10,402 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-21 21:11:10,402 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 21 treesize of output 20 [2024-11-21 21:11:10,578 INFO L349 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2024-11-21 21:11:10,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 44 [2024-11-21 21:11:10,699 INFO L349 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2024-11-21 21:11:10,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 44 [2024-11-21 21:11:10,806 INFO L349 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2024-11-21 21:11:10,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 44 [2024-11-21 21:11:10,917 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 21:11:10,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:11,154 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 21:11:11,156 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 21:11:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 21:11:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941887942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:11,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 19] total 45 [2024-11-21 21:11:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994936848] [2024-11-21 21:11:11,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:11,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-21 21:11:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-21 21:11:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2024-11-21 21:11:11,228 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 21:11:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:11,962 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2024-11-21 21:11:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-21 21:11:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 21:11:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:11,964 INFO L225 Difference]: With dead ends: 146 [2024-11-21 21:11:11,964 INFO L226 Difference]: Without dead ends: 107 [2024-11-21 21:11:11,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=4896, Unknown=0, NotChecked=0, Total=5700 [2024-11-21 21:11:11,965 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:11,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 70 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:11:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-21 21:11:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-11-21 21:11:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 94 states have internal predecessors, (110), 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 21:11:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2024-11-21 21:11:11,982 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 48 [2024-11-21 21:11:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:11,982 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2024-11-21 21:11:11,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 21:11:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2024-11-21 21:11:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 21:11:11,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:11,983 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 21:11:11,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:12,183 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 21:11:12,183 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:12,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2064820435, now seen corresponding path program 14 times [2024-11-21 21:11:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:12,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068022569] [2024-11-21 21:11:12,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:12,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:12,195 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:12,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-21 21:11:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:12,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068022569] [2024-11-21 21:11:12,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068022569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:12,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569219954] [2024-11-21 21:11:12,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:12,325 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 21:11:12,326 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 21:11:12,420 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:12,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:12,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 21:11:12,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-21 21:11:12,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-21 21:11:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569219954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:12,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-21 21:11:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001490383] [2024-11-21 21:11:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:12,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-21 21:11:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-21 21:11:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-21 21:11:12,637 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 21:11:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:12,798 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2024-11-21 21:11:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-21 21:11:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 21:11:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:12,799 INFO L225 Difference]: With dead ends: 150 [2024-11-21 21:11:12,799 INFO L226 Difference]: Without dead ends: 76 [2024-11-21 21:11:12,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-21 21:11:12,800 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:12,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:11:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-21 21:11:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2024-11-21 21:11:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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 21:11:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-21 21:11:12,820 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2024-11-21 21:11:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:12,821 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-21 21:11:12,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 21:11:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-21 21:11:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 21:11:12,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:12,821 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 21:11:12,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:13,021 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 21:11:13,022 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:13,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1449329199, now seen corresponding path program 15 times [2024-11-21 21:11:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937472138] [2024-11-21 21:11:13,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:11:13,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:13,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:11:13,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937472138] [2024-11-21 21:11:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937472138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593871937] [2024-11-21 21:11:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 21:11:14,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:14,588 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 21:11:14,588 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 21:11:14,702 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-21 21:11:14,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:14,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-21 21:11:14,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:14,712 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 21:11:14,800 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 21:11:14,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:14,846 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 21:11:14,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:14,927 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 21:11:15,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:15,049 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 21:11:15,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:15,196 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 21:11:15,422 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 21:11:15,535 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 21:11:15,643 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 21:11:15,704 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 21:11:15,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 21:11:15,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:15,842 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 21:11:15,849 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 21:11:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:11:16,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:17,554 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 21:11:17,654 INFO L349 Elim1Store]: treesize reduction 10, result has 92.8 percent of original size [2024-11-21 21:11:17,655 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 354359 treesize of output 348309 [2024-11-21 21:11:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593871937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:18,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 85 [2024-11-21 21:11:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943788593] [2024-11-21 21:11:18,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:18,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-21 21:11:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-21 21:11:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=6566, Unknown=0, NotChecked=0, Total=7140 [2024-11-21 21:11:18,045 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:20,250 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-11-21 21:11:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-21 21:11:20,250 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-21 21:11:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:20,251 INFO L225 Difference]: With dead ends: 71 [2024-11-21 21:11:20,251 INFO L226 Difference]: Without dead ends: 55 [2024-11-21 21:11:20,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3714 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=935, Invalid=9985, Unknown=0, NotChecked=0, Total=10920 [2024-11-21 21:11:20,252 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:20,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 21:11:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-21 21:11:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-21 21:11:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2024-11-21 21:11:20,263 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 50 [2024-11-21 21:11:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:20,263 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2024-11-21 21:11:20,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2024-11-21 21:11:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-21 21:11:20,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:20,264 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 21:11:20,271 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 21:11:20,464 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 21:11:20,465 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:20,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:20,465 INFO L85 PathProgramCache]: Analyzing trace with hash -194210725, now seen corresponding path program 16 times [2024-11-21 21:11:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:20,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547086103] [2024-11-21 21:11:20,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:11:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:20,479 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:11:20,479 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:20,580 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 21:11:20,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547086103] [2024-11-21 21:11:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547086103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648371847] [2024-11-21 21:11:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 21:11:20,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:20,582 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 21:11:20,583 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 21:11:20,668 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 21:11:20,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:20,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 21:11:20,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:20,746 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 21:11:20,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:20,825 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 21:11:20,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648371847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:20,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:20,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-11-21 21:11:20,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684647389] [2024-11-21 21:11:20,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:20,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 21:11:20,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 21:11:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-21 21:11:20,826 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:20,998 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-11-21 21:11:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-21 21:11:20,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-21 21:11:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:20,999 INFO L225 Difference]: With dead ends: 63 [2024-11-21 21:11:20,999 INFO L226 Difference]: Without dead ends: 59 [2024-11-21 21:11:20,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2024-11-21 21:11:20,999 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:21,000 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 24 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:11:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-21 21:11:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-21 21:11:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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 21:11:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-11-21 21:11:21,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2024-11-21 21:11:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:21,010 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-11-21 21:11:21,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-11-21 21:11:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:11:21,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:21,010 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 21:11:21,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:21,211 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 21:11:21,211 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:21,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1899679235, now seen corresponding path program 17 times [2024-11-21 21:11:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458027785] [2024-11-21 21:11:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:11:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:21,253 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 21:11:21,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:23,246 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 21:11:23,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458027785] [2024-11-21 21:11:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458027785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573962570] [2024-11-21 21:11:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 21:11:23,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:23,248 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 21:11:23,248 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 21:11:23,742 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 21:11:23,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:23,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-21 21:11:23,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:23,752 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 21:11:23,788 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 21:11:23,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:23,807 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 21:11:23,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:23,908 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 21:11:24,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:24,057 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 21:11:24,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:24,235 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 21:11:24,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:24,420 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 21:11:24,704 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 21:11:24,838 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 21:11:24,964 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 21:11:25,105 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 21:11:25,277 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 21:11:25,461 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 21:11:25,553 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 21:11:25,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:28,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 511 treesize of output 475 [2024-11-21 21:11:28,740 INFO L349 Elim1Store]: treesize reduction 150, result has 53.0 percent of original size [2024-11-21 21:11:28,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 99105279 treesize of output 86784638 [2024-11-21 21:11:29,347 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 21:11:29,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573962570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:29,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:29,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36, 36] total 99 [2024-11-21 21:11:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966653276] [2024-11-21 21:11:29,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:29,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-21 21:11:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-21 21:11:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=8729, Unknown=0, NotChecked=0, Total=9702 [2024-11-21 21:11:29,348 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 99 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 99 states have internal predecessors, (123), 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 21:11:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:32,763 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-11-21 21:11:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-21 21:11:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 99 states have internal predecessors, (123), 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 21:11:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:32,764 INFO L225 Difference]: With dead ends: 95 [2024-11-21 21:11:32,764 INFO L226 Difference]: Without dead ends: 91 [2024-11-21 21:11:32,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3997 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1342, Invalid=11998, Unknown=0, NotChecked=0, Total=13340 [2024-11-21 21:11:32,765 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:32,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 204 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-21 21:11:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-21 21:11:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2024-11-21 21:11:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 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 21:11:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2024-11-21 21:11:32,786 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 55 [2024-11-21 21:11:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:32,786 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2024-11-21 21:11:32,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 99 states have internal predecessors, (123), 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 21:11:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2024-11-21 21:11:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 21:11:32,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:32,786 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 21:11:32,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:32,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-21 21:11:32,987 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:32,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1577639611, now seen corresponding path program 7 times [2024-11-21 21:11:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:32,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107431198] [2024-11-21 21:11:32,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:33,426 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 21:11:33,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:33,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107431198] [2024-11-21 21:11:33,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107431198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55729258] [2024-11-21 21:11:33,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:33,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:33,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:33,430 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:33,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-21 21:11:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:33,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-21 21:11:33,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:33,620 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 21:11:33,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,657 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 25 treesize of output 20 [2024-11-21 21:11:33,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,686 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 25 treesize of output 20 [2024-11-21 21:11:33,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,714 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 25 treesize of output 20 [2024-11-21 21:11:33,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,740 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 25 treesize of output 20 [2024-11-21 21:11:33,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:33,768 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 25 treesize of output 20 [2024-11-21 21:11:33,802 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 21:11:33,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:33,913 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 21:11:33,914 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 21:11:33,992 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 21:11:33,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55729258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:33,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:33,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 45 [2024-11-21 21:11:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015557426] [2024-11-21 21:11:33,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:33,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-21 21:11:33,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-21 21:11:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2024-11-21 21:11:33,994 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 45 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 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 21:11:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:34,631 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2024-11-21 21:11:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-21 21:11:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 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 21:11:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:34,632 INFO L225 Difference]: With dead ends: 108 [2024-11-21 21:11:34,632 INFO L226 Difference]: Without dead ends: 87 [2024-11-21 21:11:34,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=520, Invalid=4036, Unknown=0, NotChecked=0, Total=4556 [2024-11-21 21:11:34,633 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:34,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 21:11:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-21 21:11:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2024-11-21 21:11:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-11-21 21:11:34,651 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2024-11-21 21:11:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:34,652 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-11-21 21:11:34,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 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 21:11:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-11-21 21:11:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-21 21:11:34,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:34,652 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:34,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:34,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-21 21:11:34,853 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:34,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1124328623, now seen corresponding path program 18 times [2024-11-21 21:11:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629434386] [2024-11-21 21:11:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:11:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:34,876 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-21 21:11:34,877 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:35,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:35,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629434386] [2024-11-21 21:11:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629434386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:35,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616948818] [2024-11-21 21:11:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 21:11:35,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:35,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:35,030 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-21 21:11:35,709 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-21 21:11:35,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:35,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-21 21:11:35,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 21:11:35,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 47 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-21 21:11:35,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616948818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:35,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:35,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19] total 28 [2024-11-21 21:11:35,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790253208] [2024-11-21 21:11:35,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:35,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-21 21:11:35,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-21 21:11:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2024-11-21 21:11:35,935 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:36,199 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2024-11-21 21:11:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-21 21:11:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-21 21:11:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:36,200 INFO L225 Difference]: With dead ends: 127 [2024-11-21 21:11:36,200 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 21:11:36,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=1701, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 21:11:36,201 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:36,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 47 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:11:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 21:11:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2024-11-21 21:11:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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 21:11:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-11-21 21:11:36,214 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2024-11-21 21:11:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:36,214 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-11-21 21:11:36,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 21:11:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-11-21 21:11:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-21 21:11:36,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:36,214 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 21:11:36,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-21 21:11:36,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-21 21:11:36,415 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:36,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2059006129, now seen corresponding path program 19 times [2024-11-21 21:11:36,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:36,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468106329] [2024-11-21 21:11:36,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:36,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:36,593 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 21:11:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468106329] [2024-11-21 21:11:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468106329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398540268] [2024-11-21 21:11:36,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 21:11:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:36,596 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-21 21:11:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 21:11:36,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-21 21:11:36,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:36,829 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 21:11:36,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:36,934 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 21:11:36,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398540268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 21:11:36,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 21:11:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-21 21:11:36,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634134845] [2024-11-21 21:11:36,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 21:11:36,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-21 21:11:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 21:11:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-21 21:11:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-21 21:11:36,935 INFO L87 Difference]: Start difference. First operand 61 states and 64 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 21:11:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 21:11:37,169 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2024-11-21 21:11:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 21:11:37,169 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 60 [2024-11-21 21:11:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 21:11:37,170 INFO L225 Difference]: With dead ends: 70 [2024-11-21 21:11:37,170 INFO L226 Difference]: Without dead ends: 66 [2024-11-21 21:11:37,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-11-21 21:11:37,170 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 21:11:37,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 32 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 21:11:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-21 21:11:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-11-21 21:11:37,186 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 21:11:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-11-21 21:11:37,186 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2024-11-21 21:11:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 21:11:37,187 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-11-21 21:11:37,187 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 21:11:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-11-21 21:11:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-21 21:11:37,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 21:11:37,187 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 21:11:37,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-21 21:11:37,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-21 21:11:37,388 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 21:11:37,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 21:11:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1328267249, now seen corresponding path program 20 times [2024-11-21 21:11:37,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 21:11:37,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249299837] [2024-11-21 21:11:37,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 21:11:37,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:37,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:41,292 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 21:11:41,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 21:11:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249299837] [2024-11-21 21:11:41,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249299837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 21:11:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312975800] [2024-11-21 21:11:41,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 21:11:41,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 21:11:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 21:11:41,295 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-21 21:11:41,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-21 21:11:41,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 21:11:41,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 21:11:41,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-21 21:11:41,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 21:11:41,446 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 21:11:41,893 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 21:11:42,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:42,031 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 21:11:42,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:42,182 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 21:11:42,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:42,362 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 21:11:42,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:42,556 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 21:11:42,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:42,826 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 21:11:43,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:43,097 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 21:11:43,314 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 21:11:43,465 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 21:11:43,634 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 21:11:43,801 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 21:11:43,974 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 21:11:44,156 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 21:11:44,330 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 21:11:44,425 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 21:11:44,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 21:11:48,019 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 21:11:48,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 21:11:48,639 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 14194970532399637 treesize of output 14080621323111319