./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:25:14,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:25:14,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:25:14,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:25:14,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:25:14,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:25:14,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:25:14,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:25:14,442 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:25:14,442 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:25:14,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:25:14,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:25:14,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:25:14,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:25:14,444 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:25:14,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:25:14,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:25:14,445 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:25:14,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:25:14,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:25:14,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:25:14,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:25:14,447 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:25:14,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:25:14,448 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:25:14,448 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:25:14,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:25:14,449 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:25:14,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:25:14,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:25:14,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:25:14,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:25:14,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:25:14,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:25:14,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:25:14,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:25:14,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:25:14,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:25:14,452 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:25:14,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:25:14,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:25:14,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:25:14,453 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2024-10-10 22:25:14,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:25:14,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:25:14,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:25:14,717 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:25:14,718 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:25:14,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-10-10 22:25:16,168 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:25:16,355 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:25:16,355 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-10-10 22:25:16,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7e53ae6cb/a6522bc3d6b34310b1121716bc574a4a/FLAGd50025e2b [2024-10-10 22:25:16,765 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7e53ae6cb/a6522bc3d6b34310b1121716bc574a4a [2024-10-10 22:25:16,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:25:16,770 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:25:16,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:25:16,772 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:25:16,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:25:16,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:25:16" (1/1) ... [2024-10-10 22:25:16,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6faade27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:16, skipping insertion in model container [2024-10-10 22:25:16,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:25:16" (1/1) ... [2024-10-10 22:25:16,800 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:25:16,981 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2024-10-10 22:25:17,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:25:17,056 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:25:17,079 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2024-10-10 22:25:17,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:25:17,112 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:25:17,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17 WrapperNode [2024-10-10 22:25:17,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:25:17,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:25:17,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:25:17,114 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:25:17,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,146 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-10-10 22:25:17,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:25:17,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:25:17,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:25:17,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:25:17,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,173 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 4, 7]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 2, 3]. [2024-10-10 22:25:17,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:25:17,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:25:17,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:25:17,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:25:17,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (1/1) ... [2024-10-10 22:25:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:25:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:17,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:25:17,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:25:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:25:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:25:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:25:17,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:25:17,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-10 22:25:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-10 22:25:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:25:17,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:25:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:25:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:25:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:25:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-10 22:25:17,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:25:17,341 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:25:17,343 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:25:17,474 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-10 22:25:17,474 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:25:17,508 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:25:17,509 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:25:17,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:25:17 BoogieIcfgContainer [2024-10-10 22:25:17,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:25:17,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:25:17,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:25:17,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:25:17,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:25:16" (1/3) ... [2024-10-10 22:25:17,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629309fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:25:17, skipping insertion in model container [2024-10-10 22:25:17,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:25:17" (2/3) ... [2024-10-10 22:25:17,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629309fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:25:17, skipping insertion in model container [2024-10-10 22:25:17,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:25:17" (3/3) ... [2024-10-10 22:25:17,516 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2024-10-10 22:25:17,528 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:25:17,529 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:25:17,573 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:25:17,580 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;@6edbdcf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:25:17,580 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:25:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:25:17,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:17,591 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:17,591 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:17,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash 199618784, now seen corresponding path program 1 times [2024-10-10 22:25:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014744264] [2024-10-10 22:25:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014744264] [2024-10-10 22:25:17,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014744264] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:25:17,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:25:17,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:25:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190168644] [2024-10-10 22:25:17,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:25:17,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:25:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:25:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:25:17,837 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 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) [2024-10-10 22:25:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:17,872 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2024-10-10 22:25:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:25:17,875 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 [2024-10-10 22:25:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:17,881 INFO L225 Difference]: With dead ends: 33 [2024-10-10 22:25:17,882 INFO L226 Difference]: Without dead ends: 15 [2024-10-10 22:25:17,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:25:17,889 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:17,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:25:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-10 22:25:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-10 22:25:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-10 22:25:17,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 12 [2024-10-10 22:25:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:17,925 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-10 22:25:17,926 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) [2024-10-10 22:25:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-10 22:25:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-10 22:25:17,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:17,927 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:17,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:25:17,928 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:17,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -193408226, now seen corresponding path program 1 times [2024-10-10 22:25:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797099476] [2024-10-10 22:25:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:18,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797099476] [2024-10-10 22:25:18,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797099476] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:25:18,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:25:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:25:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911100495] [2024-10-10 22:25:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:25:18,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:25:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:25:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:25:18,129 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-10 22:25:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:18,191 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2024-10-10 22:25:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:25:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2024-10-10 22:25:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:18,193 INFO L225 Difference]: With dead ends: 30 [2024-10-10 22:25:18,194 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 22:25:18,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:25:18,197 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:18,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:25:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 22:25:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-10-10 22:25:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-10 22:25:18,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2024-10-10 22:25:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:18,208 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-10 22:25:18,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-10 22:25:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-10 22:25:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:25:18,209 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:18,210 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:18,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:25:18,210 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:18,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1840868648, now seen corresponding path program 1 times [2024-10-10 22:25:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522793372] [2024-10-10 22:25:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:19,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:19,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522793372] [2024-10-10 22:25:19,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522793372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116443292] [2024-10-10 22:25:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:19,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:19,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:25:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:19,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-10 22:25:19,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:19,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:19,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:19,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:19,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:19,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-10 22:25:19,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:19,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-10-10 22:25:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116443292] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:20,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2024-10-10 22:25:20,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240817918] [2024-10-10 22:25:20,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:20,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:25:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:25:20,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:25:20,014 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2024-10-10 22:25:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:20,508 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-10-10 22:25:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-10 22:25:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) Word has length 17 [2024-10-10 22:25:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:20,511 INFO L225 Difference]: With dead ends: 40 [2024-10-10 22:25:20,511 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 22:25:20,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:25:20,513 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:20,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:25:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 22:25:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2024-10-10 22:25:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-10-10 22:25:20,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2024-10-10 22:25:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:20,522 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-10-10 22:25:20,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2024-10-10 22:25:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-10-10 22:25:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-10 22:25:20,523 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:20,524 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:20,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 22:25:20,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:20,725 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:20,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1160810278, now seen corresponding path program 1 times [2024-10-10 22:25:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085518449] [2024-10-10 22:25:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:20,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085518449] [2024-10-10 22:25:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085518449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:20,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940005453] [2024-10-10 22:25:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:20,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:20,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:20,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:20,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:25:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:20,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-10 22:25:20,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:20,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:21,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:21,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-10 22:25:21,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-10 22:25:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:21,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940005453] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:21,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:21,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-10 22:25:21,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95273177] [2024-10-10 22:25:21,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:21,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 22:25:21,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 22:25:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:25:21,058 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:21,122 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-10-10 22:25:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:25:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-10 22:25:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:21,123 INFO L225 Difference]: With dead ends: 41 [2024-10-10 22:25:21,123 INFO L226 Difference]: Without dead ends: 31 [2024-10-10 22:25:21,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:25:21,125 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:21,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:25:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-10 22:25:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-10-10 22:25:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-10-10 22:25:21,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 17 [2024-10-10 22:25:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:21,135 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-10-10 22:25:21,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-10-10 22:25:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-10 22:25:21,136 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:21,136 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:21,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 22:25:21,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:21,337 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:21,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1209506422, now seen corresponding path program 2 times [2024-10-10 22:25:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141472247] [2024-10-10 22:25:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:21,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141472247] [2024-10-10 22:25:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141472247] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:21,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888271760] [2024-10-10 22:25:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:25:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:21,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:21,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:25:21,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:25:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:21,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:25:21,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:21,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:21,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888271760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:21,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:25:21,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633329052] [2024-10-10 22:25:21,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:21,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:25:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:25:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:25:21,616 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2024-10-10 22:25:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:21,700 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2024-10-10 22:25:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:25:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) Word has length 18 [2024-10-10 22:25:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:21,701 INFO L225 Difference]: With dead ends: 55 [2024-10-10 22:25:21,701 INFO L226 Difference]: Without dead ends: 32 [2024-10-10 22:25:21,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:25:21,702 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:21,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-10 22:25:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-10-10 22:25:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-10 22:25:21,708 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2024-10-10 22:25:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:21,708 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-10 22:25:21,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2024-10-10 22:25:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-10 22:25:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-10 22:25:21,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:21,709 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:21,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 22:25:21,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:21,910 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:21,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1807460438, now seen corresponding path program 3 times [2024-10-10 22:25:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743764143] [2024-10-10 22:25:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743764143] [2024-10-10 22:25:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743764143] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181751420] [2024-10-10 22:25:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:25:22,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:22,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:22,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:25:22,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 22:25:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:22,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:25:22,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:22,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:25:22,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181751420] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:22,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:22,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-10 22:25:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130344626] [2024-10-10 22:25:22,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:22,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:25:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:25:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:25:22,170 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:22,261 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-10 22:25:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:25:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 18 [2024-10-10 22:25:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:22,262 INFO L225 Difference]: With dead ends: 32 [2024-10-10 22:25:22,262 INFO L226 Difference]: Without dead ends: 25 [2024-10-10 22:25:22,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:25:22,263 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:22,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-10 22:25:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-10 22:25:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-10 22:25:22,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2024-10-10 22:25:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:22,270 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-10 22:25:22,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-10 22:25:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:25:22,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:22,271 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:22,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:25:22,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 22:25:22,476 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:22,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1712818014, now seen corresponding path program 4 times [2024-10-10 22:25:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100946295] [2024-10-10 22:25:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:22,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100946295] [2024-10-10 22:25:23,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100946295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037629664] [2024-10-10 22:25:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:25:23,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:23,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:23,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:25:23,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:25:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:23,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-10 22:25:23,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:23,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:24,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:24,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:24,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:25:24,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:24,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:24,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:24,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-10-10 22:25:24,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:24,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 386 treesize of output 383 [2024-10-10 22:25:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037629664] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:25,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:25,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-10-10 22:25:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888275807] [2024-10-10 22:25:25,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:25,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-10 22:25:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-10 22:25:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2024-10-10 22:25:25,031 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:26,483 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2024-10-10 22:25:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-10 22:25:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:25:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:26,484 INFO L225 Difference]: With dead ends: 71 [2024-10-10 22:25:26,484 INFO L226 Difference]: Without dead ends: 58 [2024-10-10 22:25:26,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=750, Invalid=3540, Unknown=0, NotChecked=0, Total=4290 [2024-10-10 22:25:26,486 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:26,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 76 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:25:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-10 22:25:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2024-10-10 22:25:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-10-10 22:25:26,495 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 22 [2024-10-10 22:25:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:26,495 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-10-10 22:25:26,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-10-10 22:25:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:25:26,496 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:26,496 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:26,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:25:26,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:26,697 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:26,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1319791004, now seen corresponding path program 1 times [2024-10-10 22:25:26,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:26,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923414437] [2024-10-10 22:25:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:26,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 22:25:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923414437] [2024-10-10 22:25:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923414437] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486580861] [2024-10-10 22:25:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:27,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:27,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:27,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:27,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:25:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:27,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-10 22:25:27,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:27,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:27,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:27,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-10-10 22:25:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 22:25:27,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:27,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-10 22:25:27,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:25:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 22:25:27,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486580861] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:27,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:27,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-10-10 22:25:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394845001] [2024-10-10 22:25:27,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:27,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-10 22:25:27,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-10 22:25:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:25:27,238 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:27,365 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-10-10 22:25:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:25:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 22:25:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:27,366 INFO L225 Difference]: With dead ends: 68 [2024-10-10 22:25:27,366 INFO L226 Difference]: Without dead ends: 46 [2024-10-10 22:25:27,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:25:27,367 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:27,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 72 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-10 22:25:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-10-10 22:25:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-10 22:25:27,381 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 22 [2024-10-10 22:25:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:27,383 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-10 22:25:27,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-10 22:25:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:25:27,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:27,384 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:27,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:25:27,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:25:27,585 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:27,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1580597700, now seen corresponding path program 5 times [2024-10-10 22:25:27,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:27,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352184125] [2024-10-10 22:25:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:27,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:25:27,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352184125] [2024-10-10 22:25:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352184125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846102773] [2024-10-10 22:25:27,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:25:27,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:27,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:27,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:25:27,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-10 22:25:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:27,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:25:27,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:25:27,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:25:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846102773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:27,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:25:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122821647] [2024-10-10 22:25:27,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:27,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:25:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:25:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:25:27,870 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2024-10-10 22:25:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:27,999 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2024-10-10 22:25:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:25:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) Word has length 23 [2024-10-10 22:25:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:28,000 INFO L225 Difference]: With dead ends: 69 [2024-10-10 22:25:28,000 INFO L226 Difference]: Without dead ends: 38 [2024-10-10 22:25:28,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-10 22:25:28,001 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:28,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-10 22:25:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2024-10-10 22:25:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-10 22:25:28,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2024-10-10 22:25:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:28,012 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-10 22:25:28,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2024-10-10 22:25:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-10 22:25:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-10 22:25:28,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:28,013 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:28,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:25:28,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:28,214 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:28,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash -160565812, now seen corresponding path program 6 times [2024-10-10 22:25:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:28,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108744118] [2024-10-10 22:25:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 22:25:28,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:28,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108744118] [2024-10-10 22:25:28,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108744118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:28,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092287688] [2024-10-10 22:25:28,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:25:28,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:28,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:28,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:25:28,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-10 22:25:28,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:28,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 22:25:28,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:25:28,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 22:25:28,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092287688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:28,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:28,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-10 22:25:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304375035] [2024-10-10 22:25:28,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:28,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:25:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:25:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:25:28,525 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:28,655 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-10-10 22:25:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:25:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-10 22:25:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:28,656 INFO L225 Difference]: With dead ends: 38 [2024-10-10 22:25:28,656 INFO L226 Difference]: Without dead ends: 30 [2024-10-10 22:25:28,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:25:28,657 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:28,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-10 22:25:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-10-10 22:25:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-10-10 22:25:28,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2024-10-10 22:25:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:28,664 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-10-10 22:25:28,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-10-10 22:25:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:25:28,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:28,665 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:28,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 22:25:28,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:25:28,870 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:28,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 851391128, now seen corresponding path program 7 times [2024-10-10 22:25:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019671452] [2024-10-10 22:25:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019671452] [2024-10-10 22:25:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019671452] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168413046] [2024-10-10 22:25:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:25:29,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:29,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:25:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:30,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-10 22:25:30,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:30,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:30,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:30,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:30,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:25:30,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:30,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-10 22:25:30,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:30,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:30,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:30,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:31,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2024-10-10 22:25:31,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:31,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 11693 treesize of output 11111 [2024-10-10 22:25:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:31,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168413046] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:31,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:31,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 53 [2024-10-10 22:25:31,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077985485] [2024-10-10 22:25:31,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:31,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-10 22:25:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-10 22:25:31,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2459, Unknown=0, NotChecked=0, Total=2756 [2024-10-10 22:25:31,724 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:32,346 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2024-10-10 22:25:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-10 22:25:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:25:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:32,347 INFO L225 Difference]: With dead ends: 64 [2024-10-10 22:25:32,347 INFO L226 Difference]: Without dead ends: 52 [2024-10-10 22:25:32,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=386, Invalid=3036, Unknown=0, NotChecked=0, Total=3422 [2024-10-10 22:25:32,349 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:32,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:25:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-10 22:25:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2024-10-10 22:25:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2024-10-10 22:25:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-10-10 22:25:32,356 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2024-10-10 22:25:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:32,357 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-10-10 22:25:32,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-10-10 22:25:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-10 22:25:32,358 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:32,358 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:32,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 22:25:32,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:32,559 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:32,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1552455706, now seen corresponding path program 2 times [2024-10-10 22:25:32,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:32,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737504173] [2024-10-10 22:25:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:32,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:32,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737504173] [2024-10-10 22:25:32,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737504173] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670852261] [2024-10-10 22:25:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:25:32,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:32,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:32,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:25:32,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:25:32,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:32,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-10 22:25:32,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:33,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:33,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:33,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-10-10 22:25:33,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:33,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-10-10 22:25:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:33,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:33,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-10 22:25:33,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-10 22:25:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670852261] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:33,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-10-10 22:25:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890952281] [2024-10-10 22:25:33,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:33,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-10 22:25:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-10 22:25:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-10-10 22:25:33,261 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2024-10-10 22:25:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:33,529 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-10-10 22:25:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:25:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-10 22:25:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:33,530 INFO L225 Difference]: With dead ends: 56 [2024-10-10 22:25:33,530 INFO L226 Difference]: Without dead ends: 44 [2024-10-10 22:25:33,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:25:33,531 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:33,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 74 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-10 22:25:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-10-10 22:25:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2024-10-10 22:25:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-10-10 22:25:33,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 27 [2024-10-10 22:25:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:33,540 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-10-10 22:25:33,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2024-10-10 22:25:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-10-10 22:25:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:25:33,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:33,541 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:33,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 22:25:33,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-10 22:25:33,745 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:33,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash -655189782, now seen corresponding path program 8 times [2024-10-10 22:25:33,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:33,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785593316] [2024-10-10 22:25:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:33,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:33,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785593316] [2024-10-10 22:25:33,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785593316] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:33,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939918500] [2024-10-10 22:25:33,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:25:33,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:33,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:33,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:25:33,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:25:33,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:33,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:25:33,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:34,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:25:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939918500] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:34,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:34,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-10 22:25:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752577004] [2024-10-10 22:25:34,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:34,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-10 22:25:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-10 22:25:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-10 22:25:34,110 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2024-10-10 22:25:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:34,291 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2024-10-10 22:25:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 22:25:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2024-10-10 22:25:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:34,292 INFO L225 Difference]: With dead ends: 58 [2024-10-10 22:25:34,292 INFO L226 Difference]: Without dead ends: 49 [2024-10-10 22:25:34,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:25:34,293 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:34,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-10 22:25:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-10-10 22:25:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-10-10 22:25:34,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 28 [2024-10-10 22:25:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:34,301 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-10-10 22:25:34,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2024-10-10 22:25:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-10-10 22:25:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 22:25:34,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:34,302 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:34,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 22:25:34,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-10 22:25:34,507 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:34,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1479522038, now seen corresponding path program 3 times [2024-10-10 22:25:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:34,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155605223] [2024-10-10 22:25:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 22:25:34,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155605223] [2024-10-10 22:25:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155605223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40327007] [2024-10-10 22:25:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:25:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:34,641 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:34,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:25:34,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:25:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:34,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:25:34,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:25:34,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:25:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40327007] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:34,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:34,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-10 22:25:34,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70721385] [2024-10-10 22:25:34,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:34,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-10 22:25:34,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-10 22:25:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-10 22:25:34,891 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:34,991 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-10-10 22:25:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:25:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-10 22:25:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:34,992 INFO L225 Difference]: With dead ends: 62 [2024-10-10 22:25:34,992 INFO L226 Difference]: Without dead ends: 35 [2024-10-10 22:25:34,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:25:34,993 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:34,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-10 22:25:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-10-10 22:25:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2024-10-10 22:25:34,999 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 31 [2024-10-10 22:25:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:34,999 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2024-10-10 22:25:35,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2024-10-10 22:25:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-10 22:25:35,000 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:35,000 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:35,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-10 22:25:35,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:25:35,201 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:35,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1895765090, now seen corresponding path program 9 times [2024-10-10 22:25:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563394454] [2024-10-10 22:25:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:37,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563394454] [2024-10-10 22:25:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563394454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:37,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888806098] [2024-10-10 22:25:37,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:25:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:37,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:37,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:25:37,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-10 22:25:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:37,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-10 22:25:37,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:37,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:37,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:37,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:37,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:25:37,693 INFO L349 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2024-10-10 22:25:37,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 41 [2024-10-10 22:25:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:37,896 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:25:37,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 51 [2024-10-10 22:25:38,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:38,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:38,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-10 22:25:38,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-10-10 22:25:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:25:38,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:38,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 47 [2024-10-10 22:25:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:38,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:39,533 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 126 treesize of output 114 [2024-10-10 22:25:39,574 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2024-10-10 22:25:39,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 379 treesize of output 360 [2024-10-10 22:25:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888806098] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:39,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:39,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 76 [2024-10-10 22:25:39,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129889513] [2024-10-10 22:25:39,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:39,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-10-10 22:25:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:39,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-10-10 22:25:39,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=4823, Unknown=0, NotChecked=0, Total=5700 [2024-10-10 22:25:39,895 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:45,560 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2024-10-10 22:25:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-10-10 22:25:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-10 22:25:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:45,561 INFO L225 Difference]: With dead ends: 119 [2024-10-10 22:25:45,561 INFO L226 Difference]: Without dead ends: 95 [2024-10-10 22:25:45,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6584 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3260, Invalid=17910, Unknown=0, NotChecked=0, Total=21170 [2024-10-10 22:25:45,566 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:45,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 148 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:25:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-10 22:25:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2024-10-10 22:25:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-10-10 22:25:45,583 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 32 [2024-10-10 22:25:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:45,583 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-10-10 22:25:45,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-10-10 22:25:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-10 22:25:45,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:45,584 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:45,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:25:45,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:45,784 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:45,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1637599652, now seen corresponding path program 4 times [2024-10-10 22:25:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257993478] [2024-10-10 22:25:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 22:25:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:46,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257993478] [2024-10-10 22:25:46,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257993478] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:46,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567344702] [2024-10-10 22:25:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:25:46,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:46,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:46,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:46,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:25:46,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:25:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:46,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-10 22:25:46,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:46,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-10 22:25:46,688 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2024-10-10 22:25:46,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2024-10-10 22:25:46,785 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2024-10-10 22:25:46,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 58 [2024-10-10 22:25:46,922 INFO L349 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2024-10-10 22:25:46,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 80 [2024-10-10 22:25:47,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-10 22:25:47,059 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 23 treesize of output 12 [2024-10-10 22:25:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:25:47,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-10 22:25:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567344702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:47,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:47,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 35 [2024-10-10 22:25:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143460574] [2024-10-10 22:25:47,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:47,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-10 22:25:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-10 22:25:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:25:47,370 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:48,334 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2024-10-10 22:25:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:25:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-10 22:25:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:48,335 INFO L225 Difference]: With dead ends: 95 [2024-10-10 22:25:48,336 INFO L226 Difference]: Without dead ends: 55 [2024-10-10 22:25:48,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=581, Invalid=2611, Unknown=0, NotChecked=0, Total=3192 [2024-10-10 22:25:48,337 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:48,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:25:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-10 22:25:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-10 22:25:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-10-10 22:25:48,353 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 32 [2024-10-10 22:25:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:48,354 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-10-10 22:25:48,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-10-10 22:25:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:25:48,354 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:48,355 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:48,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-10 22:25:48,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-10 22:25:48,558 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:48,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 69149272, now seen corresponding path program 10 times [2024-10-10 22:25:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125061003] [2024-10-10 22:25:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:50,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125061003] [2024-10-10 22:25:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125061003] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479263023] [2024-10-10 22:25:50,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:25:50,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:50,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:50,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:50,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:25:50,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:25:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:50,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-10 22:25:50,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:50,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:25:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:51,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:51,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:25:51,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:51,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-10-10 22:25:51,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:51,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-10-10 22:25:51,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:51,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-10-10 22:25:51,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:51,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:51,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:51,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:52,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:25:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:52,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:53,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 283 [2024-10-10 22:25:53,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:25:53,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 799411055 treesize of output 780536873 [2024-10-10 22:25:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:25:54,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479263023] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:54,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:54,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 81 [2024-10-10 22:25:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330524546] [2024-10-10 22:25:54,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:54,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-10-10 22:25:54,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-10-10 22:25:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=5891, Unknown=0, NotChecked=0, Total=6480 [2024-10-10 22:25:54,809 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 81 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 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) [2024-10-10 22:25:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:56,205 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2024-10-10 22:25:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-10 22:25:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 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 37 [2024-10-10 22:25:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:56,206 INFO L225 Difference]: With dead ends: 117 [2024-10-10 22:25:56,206 INFO L226 Difference]: Without dead ends: 103 [2024-10-10 22:25:56,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=703, Invalid=6779, Unknown=0, NotChecked=0, Total=7482 [2024-10-10 22:25:56,209 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:56,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 124 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-10 22:25:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-10 22:25:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2024-10-10 22:25:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 78 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) [2024-10-10 22:25:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2024-10-10 22:25:56,238 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 37 [2024-10-10 22:25:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:56,238 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2024-10-10 22:25:56,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 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) [2024-10-10 22:25:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2024-10-10 22:25:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-10 22:25:56,239 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:56,240 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:56,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-10 22:25:56,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-10 22:25:56,440 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:56,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1760802262, now seen corresponding path program 11 times [2024-10-10 22:25:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:56,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873567342] [2024-10-10 22:25:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:56,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:25:56,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873567342] [2024-10-10 22:25:56,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873567342] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730623013] [2024-10-10 22:25:56,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:25:56,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:56,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:56,645 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:56,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-10 22:25:56,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-10 22:25:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:56,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:25:56,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-10 22:25:56,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-10 22:25:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730623013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:57,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-10 22:25:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261020590] [2024-10-10 22:25:57,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:57,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:25:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:25:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:25:57,087 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:57,355 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2024-10-10 22:25:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 22:25:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-10 22:25:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:57,356 INFO L225 Difference]: With dead ends: 101 [2024-10-10 22:25:57,356 INFO L226 Difference]: Without dead ends: 90 [2024-10-10 22:25:57,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:25:57,357 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:57,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 39 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:25:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-10 22:25:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2024-10-10 22:25:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2024-10-10 22:25:57,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 38 [2024-10-10 22:25:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:57,376 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2024-10-10 22:25:57,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2024-10-10 22:25:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-10 22:25:57,377 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:57,377 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:57,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-10 22:25:57,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-10 22:25:57,578 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:57,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -780415730, now seen corresponding path program 5 times [2024-10-10 22:25:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138787444] [2024-10-10 22:25:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:25:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:25:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:25:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138787444] [2024-10-10 22:25:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138787444] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:25:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759705390] [2024-10-10 22:25:57,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:25:57,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:57,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:25:57,752 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:25:57,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-10 22:25:58,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-10 22:25:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:25:58,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 22:25:58,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:25:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:25:58,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:25:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:25:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759705390] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:25:58,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:25:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-10 22:25:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174891680] [2024-10-10 22:25:58,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:25:58,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 22:25:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:25:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 22:25:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-10 22:25:58,590 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:25:58,728 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-10-10 22:25:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-10 22:25:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-10 22:25:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:25:58,729 INFO L225 Difference]: With dead ends: 100 [2024-10-10 22:25:58,729 INFO L226 Difference]: Without dead ends: 51 [2024-10-10 22:25:58,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-10 22:25:58,730 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:25:58,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:25:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-10 22:25:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-10 22:25:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 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) [2024-10-10 22:25:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-10 22:25:58,751 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 41 [2024-10-10 22:25:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:25:58,752 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-10 22:25:58,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:25:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-10 22:25:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:25:58,754 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:25:58,754 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:25:58,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-10 22:25:58,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:25:58,955 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:25:58,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:25:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1246167074, now seen corresponding path program 12 times [2024-10-10 22:25:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:25:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839754051] [2024-10-10 22:25:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:25:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:25:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839754051] [2024-10-10 22:26:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839754051] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716794296] [2024-10-10 22:26:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:26:01,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:01,980 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:01,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-10 22:26:02,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-10 22:26:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:02,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-10 22:26:02,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:02,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:02,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:02,459 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:26:02,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 27 [2024-10-10 22:26:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:02,616 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:26:02,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 41 [2024-10-10 22:26:02,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:02,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:02,808 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:26:02,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 55 [2024-10-10 22:26:03,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,050 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:26:03,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 63 treesize of output 69 [2024-10-10 22:26:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:03,400 INFO L349 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2024-10-10 22:26:03,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 83 [2024-10-10 22:26:03,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:03,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-10 22:26:04,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-10-10 22:26:04,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-10-10 22:26:04,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2024-10-10 22:26:04,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2024-10-10 22:26:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-10 22:26:04,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:26:04,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 40 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 96 treesize of output 152 [2024-10-10 22:26:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 39 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-10 22:26:04,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:06,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 104 [2024-10-10 22:26:06,689 INFO L349 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2024-10-10 22:26:06,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 73 [2024-10-10 22:26:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 22:26:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716794296] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:06,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 34] total 97 [2024-10-10 22:26:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569007952] [2024-10-10 22:26:06,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:06,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-10-10 22:26:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-10-10 22:26:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=7926, Unknown=0, NotChecked=0, Total=9312 [2024-10-10 22:26:06,974 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:24,128 INFO L93 Difference]: Finished difference Result 168 states and 222 transitions. [2024-10-10 22:26:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-10-10 22:26:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-10 22:26:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:24,129 INFO L225 Difference]: With dead ends: 168 [2024-10-10 22:26:24,129 INFO L226 Difference]: Without dead ends: 163 [2024-10-10 22:26:24,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17661 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=8154, Invalid=45902, Unknown=0, NotChecked=0, Total=54056 [2024-10-10 22:26:24,132 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 202 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:24,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 148 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-10 22:26:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-10-10 22:26:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 122. [2024-10-10 22:26:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 121 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2024-10-10 22:26:24,169 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 42 [2024-10-10 22:26:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:24,169 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2024-10-10 22:26:24,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2024-10-10 22:26:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 22:26:24,170 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:24,170 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:24,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-10 22:26:24,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:24,371 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:24,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1460452320, now seen corresponding path program 6 times [2024-10-10 22:26:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:24,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995603959] [2024-10-10 22:26:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-10 22:26:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995603959] [2024-10-10 22:26:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995603959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920559067] [2024-10-10 22:26:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:26:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:25,031 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:25,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-10 22:26:25,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-10 22:26:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:25,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-10 22:26:25,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:25,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-10 22:26:25,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-10-10 22:26:25,326 INFO L349 Elim1Store]: treesize reduction 18, result has 57.1 percent of original size [2024-10-10 22:26:25,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2024-10-10 22:26:25,405 INFO L349 Elim1Store]: treesize reduction 42, result has 52.8 percent of original size [2024-10-10 22:26:25,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 73 [2024-10-10 22:26:25,596 INFO L349 Elim1Store]: treesize reduction 60, result has 43.9 percent of original size [2024-10-10 22:26:25,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 95 treesize of output 118 [2024-10-10 22:26:25,913 INFO L349 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2024-10-10 22:26:25,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 135 treesize of output 157 [2024-10-10 22:26:26,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:26:26,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 193 [2024-10-10 22:26:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 22:26:26,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 73 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 22:26:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920559067] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:27,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:27,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 23] total 63 [2024-10-10 22:26:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963891381] [2024-10-10 22:26:27,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:27,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-10 22:26:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-10 22:26:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=3282, Unknown=0, NotChecked=0, Total=3906 [2024-10-10 22:26:27,586 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 63 states, 63 states have (on average 1.619047619047619) internal successors, (102), 63 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:31,285 INFO L93 Difference]: Finished difference Result 211 states and 274 transitions. [2024-10-10 22:26:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-10 22:26:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.619047619047619) internal successors, (102), 63 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-10 22:26:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:31,286 INFO L225 Difference]: With dead ends: 211 [2024-10-10 22:26:31,286 INFO L226 Difference]: Without dead ends: 197 [2024-10-10 22:26:31,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2586, Invalid=13164, Unknown=0, NotChecked=0, Total=15750 [2024-10-10 22:26:31,288 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:31,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 149 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-10 22:26:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-10 22:26:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 76. [2024-10-10 22:26:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2024-10-10 22:26:31,334 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 42 [2024-10-10 22:26:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:31,335 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2024-10-10 22:26:31,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.619047619047619) internal successors, (102), 63 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2024-10-10 22:26:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-10 22:26:31,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:31,336 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:31,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-10 22:26:31,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:31,537 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:31,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash 46373188, now seen corresponding path program 13 times [2024-10-10 22:26:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:31,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896048802] [2024-10-10 22:26:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:31,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-10 22:26:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:31,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896048802] [2024-10-10 22:26:31,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896048802] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:31,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547333487] [2024-10-10 22:26:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:26:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:31,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:31,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-10 22:26:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:31,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-10 22:26:31,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-10 22:26:32,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:26:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-10 22:26:32,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547333487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:26:32,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:26:32,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-10 22:26:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355571709] [2024-10-10 22:26:32,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:26:32,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-10 22:26:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:26:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-10 22:26:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:26:32,163 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2024-10-10 22:26:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:26:32,358 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2024-10-10 22:26:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:26:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) Word has length 43 [2024-10-10 22:26:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:26:32,360 INFO L225 Difference]: With dead ends: 121 [2024-10-10 22:26:32,360 INFO L226 Difference]: Without dead ends: 62 [2024-10-10 22:26:32,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:26:32,361 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:26:32,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 33 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:26:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-10 22:26:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2024-10-10 22:26:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:26:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-10-10 22:26:32,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2024-10-10 22:26:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:26:32,388 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-10-10 22:26:32,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2024-10-10 22:26:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-10-10 22:26:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-10 22:26:32,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:26:32,389 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:26:32,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-10 22:26:32,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:32,589 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:26:32,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:26:32,590 INFO L85 PathProgramCache]: Analyzing trace with hash 308437528, now seen corresponding path program 14 times [2024-10-10 22:26:32,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:26:32,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420842335] [2024-10-10 22:26:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:26:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:26:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:26:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:26:36,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:26:36,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420842335] [2024-10-10 22:26:36,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420842335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:26:36,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210332108] [2024-10-10 22:26:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:26:36,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:26:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:26:36,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:26:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-10 22:26:36,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:26:36,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:26:36,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-10-10 22:26:36,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:26:36,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-10 22:26:36,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-10 22:26:37,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:26:37,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-10-10 22:26:37,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:26:37,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31