./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum_array-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/sum_array-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:42:15,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:42:15,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:42:15,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:42:15,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:42:15,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:42:15,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:42:15,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:42:15,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:42:15,879 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:42:15,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:42:15,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:42:15,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:42:15,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:42:15,880 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:42:15,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:42:15,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:42:15,882 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:42:15,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:42:15,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:42:15,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:42:15,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:42:15,886 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:42:15,887 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:42:15,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:42:15,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:42:15,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:42:15,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 [2024-11-11 19:42:16,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:42:16,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:42:16,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:42:16,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:42:16,092 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:42:16,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2-2.i [2024-11-11 19:42:17,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:42:17,429 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:42:17,429 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2-2.i [2024-11-11 19:42:17,435 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a45c90ba/58d6a42b9d544bf28448ebf1c767f779/FLAGa02246479 [2024-11-11 19:42:17,842 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a45c90ba/58d6a42b9d544bf28448ebf1c767f779 [2024-11-11 19:42:17,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:42:17,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:42:17,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:42:17,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:42:17,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:42:17,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:42:17" (1/1) ... [2024-11-11 19:42:17,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733795f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:17, skipping insertion in model container [2024-11-11 19:42:17,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:42:17" (1/1) ... [2024-11-11 19:42:17,872 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:42:17,995 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/loops/sum_array-2-2.i[940,953] [2024-11-11 19:42:18,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:42:18,015 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:42:18,027 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/loops/sum_array-2-2.i[940,953] [2024-11-11 19:42:18,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:42:18,056 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:42:18,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18 WrapperNode [2024-11-11 19:42:18,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:42:18,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:42:18,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:42:18,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:42:18,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,074 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,097 INFO L138 Inliner]: procedures = 18, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2024-11-11 19:42:18,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:42:18,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:42:18,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:42:18,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:42:18,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,132 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-11-11 19:42:18,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:42:18,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:42:18,146 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:42:18,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:42:18,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (1/1) ... [2024-11-11 19:42:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:42:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:18,176 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) [2024-11-11 19:42:18,179 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 [2024-11-11 19:42:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:42:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:42:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 19:42:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 19:42:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 19:42:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 19:42:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:42:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 19:42:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 19:42:18,335 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:42:18,337 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:42:18,504 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-11 19:42:18,505 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:42:18,517 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:42:18,518 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-11 19:42:18,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:42:18 BoogieIcfgContainer [2024-11-11 19:42:18,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:42:18,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:42:18,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:42:18,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:42:18,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:42:17" (1/3) ... [2024-11-11 19:42:18,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c683bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:42:18, skipping insertion in model container [2024-11-11 19:42:18,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:42:18" (2/3) ... [2024-11-11 19:42:18,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c683bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:42:18, skipping insertion in model container [2024-11-11 19:42:18,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:42:18" (3/3) ... [2024-11-11 19:42:18,526 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_array-2-2.i [2024-11-11 19:42:18,540 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:42:18,540 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:42:18,582 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:42:18,587 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;@16a4febb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:42:18,587 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:42:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) [2024-11-11 19:42:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-11 19:42:18,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:18,594 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:18,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:18,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash -385982491, now seen corresponding path program 1 times [2024-11-11 19:42:18,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:18,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554267332] [2024-11-11 19:42:18,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:18,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:42:18,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:18,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554267332] [2024-11-11 19:42:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554267332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:42:18,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:42:18,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 19:42:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301487545] [2024-11-11 19:42:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:42:18,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 19:42:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 19:42:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 19:42:18,781 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-11 19:42:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:18,792 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2024-11-11 19:42:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 19:42:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-11 19:42:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:18,800 INFO L225 Difference]: With dead ends: 45 [2024-11-11 19:42:18,801 INFO L226 Difference]: Without dead ends: 22 [2024-11-11 19:42:18,803 INFO L434 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 [2024-11-11 19:42:18,807 INFO L435 NwaCegarLoop]: 34 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, 34 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 [2024-11-11 19:42:18,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:42:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-11 19:42:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-11 19:42:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2024-11-11 19:42:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-11 19:42:18,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2024-11-11 19:42:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:18,835 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-11 19:42:18,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-11 19:42:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-11 19:42:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-11 19:42:18,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:18,838 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:18,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:42:18,839 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:18,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash -391523617, now seen corresponding path program 1 times [2024-11-11 19:42:18,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:18,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716319152] [2024-11-11 19:42:18,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:42:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:19,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716319152] [2024-11-11 19:42:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716319152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:42:19,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:42:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 19:42:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106561303] [2024-11-11 19:42:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:42:19,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 19:42:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 19:42:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:42:19,096 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-11 19:42:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:19,193 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-11 19:42:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 19:42:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 12 [2024-11-11 19:42:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:19,194 INFO L225 Difference]: With dead ends: 58 [2024-11-11 19:42:19,195 INFO L226 Difference]: Without dead ends: 38 [2024-11-11 19:42:19,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-11 19:42:19,196 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:19,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:42:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-11 19:42:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2024-11-11 19:42:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2024-11-11 19:42:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-11 19:42:19,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2024-11-11 19:42:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:19,206 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-11 19:42:19,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-11-11 19:42:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-11 19:42:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 19:42:19,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:19,207 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:19,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 19:42:19,208 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:19,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:19,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1083884881, now seen corresponding path program 1 times [2024-11-11 19:42:19,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:19,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983698185] [2024-11-11 19:42:19,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:19,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:42:20,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:20,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983698185] [2024-11-11 19:42:20,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983698185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:20,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855967409] [2024-11-11 19:42:20,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:20,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:20,456 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) [2024-11-11 19:42:20,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 19:42:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:20,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-11 19:42:20,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:42:20,608 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 21 treesize of output 17 [2024-11-11 19:42:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:42:20,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:42:20,866 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-11 19:42:20,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 42 [2024-11-11 19:42:20,878 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 44 treesize of output 40 [2024-11-11 19:42:20,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:42:20,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-11 19:42:20,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:42:20,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2024-11-11 19:42:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 19:42:20,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855967409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:42:20,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:42:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2024-11-11 19:42:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964168956] [2024-11-11 19:42:20,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:42:20,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 19:42:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 19:42:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-11 19:42:20,949 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2024-11-11 19:42:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:21,110 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-11-11 19:42:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 19:42:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22 [2024-11-11 19:42:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:21,112 INFO L225 Difference]: With dead ends: 38 [2024-11-11 19:42:21,112 INFO L226 Difference]: Without dead ends: 36 [2024-11-11 19:42:21,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-11 19:42:21,113 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:21,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:42:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-11 19:42:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2024-11-11 19:42:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2024-11-11 19:42:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-11 19:42:21,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2024-11-11 19:42:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:21,118 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-11 19:42:21,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2024-11-11 19:42:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-11 19:42:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-11 19:42:21,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:21,118 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:21,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 19:42:21,322 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 [2024-11-11 19:42:21,323 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:21,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -924768315, now seen corresponding path program 1 times [2024-11-11 19:42:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587896972] [2024-11-11 19:42:21,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:21,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 19:42:21,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587896972] [2024-11-11 19:42:21,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587896972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:21,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727804893] [2024-11-11 19:42:21,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:21,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:21,482 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) [2024-11-11 19:42:21,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 19:42:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:21,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-11 19:42:21,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:42:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 19:42:21,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:42:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 19:42:21,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727804893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:42:21,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:42:21,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-11 19:42:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653118684] [2024-11-11 19:42:21,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:42:21,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-11 19:42:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-11 19:42:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-11 19:42:21,777 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2024-11-11 19:42:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:21,926 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2024-11-11 19:42:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 19:42:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) Word has length 26 [2024-11-11 19:42:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:21,927 INFO L225 Difference]: With dead ends: 85 [2024-11-11 19:42:21,927 INFO L226 Difference]: Without dead ends: 52 [2024-11-11 19:42:21,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-11 19:42:21,928 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:21,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:42:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-11 19:42:21,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2024-11-11 19:42:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2024-11-11 19:42:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-11 19:42:21,934 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 26 [2024-11-11 19:42:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:21,934 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-11 19:42:21,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2024-11-11 19:42:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-11 19:42:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-11 19:42:21,938 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:21,939 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:21,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 19:42:22,139 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 [2024-11-11 19:42:22,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:22,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash 279637269, now seen corresponding path program 2 times [2024-11-11 19:42:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139694379] [2024-11-11 19:42:22,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:42:23,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139694379] [2024-11-11 19:42:23,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139694379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:23,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752292649] [2024-11-11 19:42:23,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:42:23,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:23,790 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) [2024-11-11 19:42:23,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 19:42:23,869 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:42:23,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:42:23,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-11 19:42:23,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:42:23,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-11 19:42:23,979 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 27 treesize of output 23 [2024-11-11 19:42:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:42:24,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:42:24,448 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-11 19:42:24,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-11 19:42:24,458 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 44 treesize of output 40 [2024-11-11 19:42:24,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:42:24,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-11-11 19:42:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 19:42:24,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752292649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:42:24,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:42:24,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 29 [2024-11-11 19:42:24,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605864367] [2024-11-11 19:42:24,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:42:24,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-11 19:42:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-11 19:42:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2024-11-11 19:42:24,533 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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) [2024-11-11 19:42:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:24,917 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-11-11 19:42:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 19:42:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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 [2024-11-11 19:42:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:24,918 INFO L225 Difference]: With dead ends: 52 [2024-11-11 19:42:24,918 INFO L226 Difference]: Without dead ends: 50 [2024-11-11 19:42:24,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2024-11-11 19:42:24,919 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:24,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 125 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:42:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-11 19:42:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-11-11 19:42:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2024-11-11 19:42:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-11-11 19:42:24,925 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2024-11-11 19:42:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:24,925 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-11-11 19:42:24,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.206896551724138) internal successors, (93), 29 states have internal predecessors, (93), 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) [2024-11-11 19:42:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-11-11 19:42:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-11 19:42:24,926 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:24,926 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:24,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 19:42:25,126 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 [2024-11-11 19:42:25,127 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:25,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1046792405, now seen corresponding path program 3 times [2024-11-11 19:42:25,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:25,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327711261] [2024-11-11 19:42:25,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:25,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 19:42:25,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327711261] [2024-11-11 19:42:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327711261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:25,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842254297] [2024-11-11 19:42:25,353 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:42:25,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:25,355 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) [2024-11-11 19:42:25,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 19:42:25,455 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 19:42:25,455 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:42:25,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 19:42:25,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:42:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 19:42:25,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:42:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-11 19:42:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842254297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:42:25,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:42:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2024-11-11 19:42:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170210758] [2024-11-11 19:42:25,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:42:25,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-11 19:42:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-11 19:42:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-11 19:42:25,737 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2024-11-11 19:42:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:25,999 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-11 19:42:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 19:42:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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 40 [2024-11-11 19:42:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:26,000 INFO L225 Difference]: With dead ends: 115 [2024-11-11 19:42:26,000 INFO L226 Difference]: Without dead ends: 66 [2024-11-11 19:42:26,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-11 19:42:26,001 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:26,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 179 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:42:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-11 19:42:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2024-11-11 19:42:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2024-11-11 19:42:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-11-11 19:42:26,006 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 40 [2024-11-11 19:42:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:26,007 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-11-11 19:42:26,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 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) [2024-11-11 19:42:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-11-11 19:42:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-11 19:42:26,008 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:26,008 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:26,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 19:42:26,208 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 [2024-11-11 19:42:26,209 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:26,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1454597637, now seen corresponding path program 4 times [2024-11-11 19:42:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4130606] [2024-11-11 19:42:26,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 19:42:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4130606] [2024-11-11 19:42:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4130606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977482750] [2024-11-11 19:42:27,632 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 19:42:27,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:27,635 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) [2024-11-11 19:42:27,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 19:42:27,718 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 19:42:27,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:42:27,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-11 19:42:27,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:42:27,846 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 27 treesize of output 23 [2024-11-11 19:42:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:42:27,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:42:28,267 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-11 19:42:28,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-11 19:42:28,287 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 48 treesize of output 44 [2024-11-11 19:42:28,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:42:28,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-11 19:42:28,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:42:28,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-11 19:42:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-11 19:42:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977482750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:42:28,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:42:28,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 31 [2024-11-11 19:42:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836373564] [2024-11-11 19:42:28,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:42:28,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-11 19:42:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:42:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-11 19:42:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-11-11 19:42:28,406 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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) [2024-11-11 19:42:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:42:28,861 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2024-11-11 19:42:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 19:42:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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 50 [2024-11-11 19:42:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:42:28,862 INFO L225 Difference]: With dead ends: 66 [2024-11-11 19:42:28,863 INFO L226 Difference]: Without dead ends: 64 [2024-11-11 19:42:28,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-11-11 19:42:28,864 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:42:28,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:42:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-11 19:42:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2024-11-11 19:42:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 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) [2024-11-11 19:42:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-11 19:42:28,870 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 50 [2024-11-11 19:42:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:42:28,871 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-11 19:42:28,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 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) [2024-11-11 19:42:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-11 19:42:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-11 19:42:28,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:42:28,871 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:42:28,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 19:42:29,072 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 [2024-11-11 19:42:29,072 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:42:29,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:42:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1506803439, now seen corresponding path program 5 times [2024-11-11 19:42:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:42:29,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766189250] [2024-11-11 19:42:29,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:42:29,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:42:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:42:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 19:42:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:42:29,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766189250] [2024-11-11 19:42:29,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766189250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:42:29,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11473913] [2024-11-11 19:42:29,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 19:42:29,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:42:29,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:42:29,305 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) [2024-11-11 19:42:29,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:43:18,347 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-11 19:43:18,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:43:18,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 19:43:18,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:43:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 19:43:18,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:43:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 19:43:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11473913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:43:18,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:43:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-11 19:43:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829893991] [2024-11-11 19:43:18,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:43:18,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-11 19:43:18,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:43:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-11 19:43:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:43:18,700 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2024-11-11 19:43:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:43:19,015 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2024-11-11 19:43:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 19:43:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 54 [2024-11-11 19:43:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:43:19,016 INFO L225 Difference]: With dead ends: 145 [2024-11-11 19:43:19,016 INFO L226 Difference]: Without dead ends: 80 [2024-11-11 19:43:19,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:43:19,017 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:43:19,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 234 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:43:19,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-11 19:43:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2024-11-11 19:43:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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) [2024-11-11 19:43:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-11-11 19:43:19,024 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 54 [2024-11-11 19:43:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:43:19,024 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-11-11 19:43:19,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2024-11-11 19:43:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-11-11 19:43:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-11 19:43:19,025 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:43:19,025 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:43:19,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-11 19:43:19,225 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 [2024-11-11 19:43:19,226 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:43:19,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:43:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash 566903137, now seen corresponding path program 6 times [2024-11-11 19:43:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:43:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855632070] [2024-11-11 19:43:19,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:43:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:43:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:43:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:43:22,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:43:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855632070] [2024-11-11 19:43:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855632070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:43:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479751234] [2024-11-11 19:43:22,871 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 19:43:22,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:43:22,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:43:22,872 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) [2024-11-11 19:43:22,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 19:43:23,087 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-11 19:43:23,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:43:23,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 19:43:23,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:43:23,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-11 19:43:23,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-11-11 19:43:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:43:23,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:43:24,407 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-11 19:43:24,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-11 19:43:24,418 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 48 treesize of output 44 [2024-11-11 19:43:24,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:43:24,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-11 19:43:24,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 12 [2024-11-11 19:43:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-11 19:43:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479751234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:43:24,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:43:24,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 13] total 52 [2024-11-11 19:43:24,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274358173] [2024-11-11 19:43:24,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:43:24,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-11 19:43:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:43:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-11 19:43:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2024-11-11 19:43:24,642 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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) [2024-11-11 19:43:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:43:26,570 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2024-11-11 19:43:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-11 19:43:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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 64 [2024-11-11 19:43:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:43:26,571 INFO L225 Difference]: With dead ends: 130 [2024-11-11 19:43:26,571 INFO L226 Difference]: Without dead ends: 82 [2024-11-11 19:43:26,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=709, Invalid=4991, Unknown=0, NotChecked=0, Total=5700 [2024-11-11 19:43:26,573 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 19:43:26,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 451 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 19:43:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-11 19:43:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2024-11-11 19:43:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 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) [2024-11-11 19:43:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-11-11 19:43:26,579 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 64 [2024-11-11 19:43:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:43:26,579 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-11-11 19:43:26,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0961538461538463) internal successors, (161), 52 states have internal predecessors, (161), 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) [2024-11-11 19:43:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-11-11 19:43:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-11 19:43:26,580 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:43:26,580 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:43:26,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-11 19:43:26,780 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 [2024-11-11 19:43:26,780 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:43:26,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:43:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1607190672, now seen corresponding path program 7 times [2024-11-11 19:43:26,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:43:26,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757849094] [2024-11-11 19:43:26,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:43:26,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:43:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:43:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 19:43:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:43:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757849094] [2024-11-11 19:43:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757849094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:43:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598647110] [2024-11-11 19:43:27,088 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-11 19:43:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:43:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:43:27,090 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) [2024-11-11 19:43:27,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 19:43:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:43:27,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-11 19:43:27,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:43:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 19:43:27,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:43:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-11 19:43:27,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598647110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:43:27,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:43:27,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2024-11-11 19:43:27,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848369075] [2024-11-11 19:43:27,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:43:27,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-11 19:43:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:43:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-11 19:43:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-11 19:43:27,504 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 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) [2024-11-11 19:43:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:43:28,134 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2024-11-11 19:43:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-11 19:43:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 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 72 [2024-11-11 19:43:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:43:28,136 INFO L225 Difference]: With dead ends: 177 [2024-11-11 19:43:28,136 INFO L226 Difference]: Without dead ends: 146 [2024-11-11 19:43:28,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 19:43:28,137 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 402 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-11 19:43:28,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 264 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-11 19:43:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-11 19:43:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 79. [2024-11-11 19:43:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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) [2024-11-11 19:43:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2024-11-11 19:43:28,145 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2024-11-11 19:43:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:43:28,145 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2024-11-11 19:43:28,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 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) [2024-11-11 19:43:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2024-11-11 19:43:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-11 19:43:28,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:43:28,146 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:43:28,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 19:43:28,350 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 [2024-11-11 19:43:28,351 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:43:28,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:43:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash -808721593, now seen corresponding path program 8 times [2024-11-11 19:43:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:43:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337926238] [2024-11-11 19:43:28,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:43:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:43:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:43:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:43:30,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:43:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337926238] [2024-11-11 19:43:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337926238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:43:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918105714] [2024-11-11 19:43:30,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:43:30,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:43:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:43:30,471 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) [2024-11-11 19:43:30,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 19:43:30,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:43:30,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:43:30,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-11 19:43:30,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:43:30,704 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 19 treesize of output 1 [2024-11-11 19:43:30,784 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 27 treesize of output 23 [2024-11-11 19:43:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:43:31,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:43:31,637 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-11 19:43:31,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 42 [2024-11-11 19:43:31,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-11 19:43:31,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:43:31,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-11 19:43:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-11 19:43:31,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918105714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:43:31,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:43:31,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 44 [2024-11-11 19:43:31,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72123517] [2024-11-11 19:43:31,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:43:31,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-11 19:43:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:43:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-11 19:43:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2024-11-11 19:43:31,802 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 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) [2024-11-11 19:43:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:43:32,693 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2024-11-11 19:43:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-11 19:43:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 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 78 [2024-11-11 19:43:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:43:32,694 INFO L225 Difference]: With dead ends: 94 [2024-11-11 19:43:32,695 INFO L226 Difference]: Without dead ends: 92 [2024-11-11 19:43:32,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=2344, Unknown=0, NotChecked=0, Total=2652 [2024-11-11 19:43:32,695 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 19:43:32,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 511 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 19:43:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-11 19:43:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2024-11-11 19:43:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 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) [2024-11-11 19:43:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2024-11-11 19:43:32,703 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2024-11-11 19:43:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:43:32,703 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2024-11-11 19:43:32,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 44 states have internal predecessors, (195), 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) [2024-11-11 19:43:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2024-11-11 19:43:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-11 19:43:32,704 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:43:32,704 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:43:32,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-11 19:43:32,904 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 [2024-11-11 19:43:32,905 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:43:32,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:43:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2115093597, now seen corresponding path program 9 times [2024-11-11 19:43:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:43:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292324687] [2024-11-11 19:43:32,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:43:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:43:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:43:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-11 19:43:33,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:43:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292324687] [2024-11-11 19:43:33,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292324687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:43:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678321053] [2024-11-11 19:43:33,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:43:33,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:43:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:43:33,314 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) [2024-11-11 19:43:33,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process