./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s2lif.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:18:08,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:18:08,358 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:18:08,364 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:18:08,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:18:08,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:18:08,386 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:18:08,386 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:18:08,386 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:18:08,387 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:18:08,387 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:18:08,387 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:18:08,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:18:08,388 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:18:08,388 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:18:08,389 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:18:08,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:18:08,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:18:08,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:18:08,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:18:08,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:18:08,393 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:18:08,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:18:08,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:18:08,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:18:08,395 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:18:08,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:18:08,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:18:08,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:18:08,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:18:08,396 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:18:08,396 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:18:08,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:18:08,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:18:08,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:18:08,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:18:08,397 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:18:08,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:18:08,398 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:18:08,398 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:18:08,398 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:18:08,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:18:08,399 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2024-11-08 10:18:08,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:18:08,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:18:08,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:18:08,640 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:18:08,641 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:18:08,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2lif.c [2024-11-08 10:18:10,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:18:10,154 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:18:10,157 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2024-11-08 10:18:10,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a94b9e98/6226ed383bfb442585bcae6ebcc72de2/FLAGd0a56518c [2024-11-08 10:18:10,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a94b9e98/6226ed383bfb442585bcae6ebcc72de2 [2024-11-08 10:18:10,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:18:10,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:18:10,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:18:10,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:18:10,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:18:10,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648dadd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10, skipping insertion in model container [2024-11-08 10:18:10,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,208 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:18:10,376 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2024-11-08 10:18:10,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:18:10,436 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:18:10,447 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2024-11-08 10:18:10,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:18:10,473 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:18:10,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10 WrapperNode [2024-11-08 10:18:10,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:18:10,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:18:10,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:18:10,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:18:10,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,511 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2024-11-08 10:18:10,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:18:10,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:18:10,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:18:10,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:18:10,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,537 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 4, 7]. 38 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 5 writes are split as follows [0, 0, 2, 3]. [2024-11-08 10:18:10,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,542 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:18:10,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:18:10,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:18:10,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:18:10,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (1/1) ... [2024-11-08 10:18:10,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:18:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:10,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 10:18:10,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 10:18:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:18:10,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:18:10,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:18:10,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:18:10,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 10:18:10,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:18:10,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 10:18:10,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:18:10,712 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:18:10,714 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:18:10,863 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-08 10:18:10,863 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:18:10,874 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:18:10,875 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 10:18:10,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:18:10 BoogieIcfgContainer [2024-11-08 10:18:10,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:18:10,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:18:10,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:18:10,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:18:10,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:18:10" (1/3) ... [2024-11-08 10:18:10,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb4257e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:18:10, skipping insertion in model container [2024-11-08 10:18:10,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:10" (2/3) ... [2024-11-08 10:18:10,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb4257e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:18:10, skipping insertion in model container [2024-11-08 10:18:10,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:18:10" (3/3) ... [2024-11-08 10:18:10,884 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2024-11-08 10:18:10,900 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:18:10,900 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:18:10,944 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:18:10,950 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;@46214baf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:18:10,950 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:18:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 10:18:10,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:10,959 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:10,960 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:10,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2024-11-08 10:18:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:10,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620440357] [2024-11-08 10:18:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:11,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620440357] [2024-11-08 10:18:11,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620440357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:18:11,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:18:11,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:18:11,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756834607] [2024-11-08 10:18:11,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:18:11,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:18:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:18:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:18:11,154 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:11,164 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-08 10:18:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:18:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-08 10:18:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:11,170 INFO L225 Difference]: With dead ends: 40 [2024-11-08 10:18:11,170 INFO L226 Difference]: Without dead ends: 18 [2024-11-08 10:18:11,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:18:11,174 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:11,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-08 10:18:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-08 10:18:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-11-08 10:18:11,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-11-08 10:18:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:11,196 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-11-08 10:18:11,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-08 10:18:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 10:18:11,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:11,197 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:11,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:18:11,197 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:11,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2024-11-08 10:18:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386895002] [2024-11-08 10:18:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:11,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386895002] [2024-11-08 10:18:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386895002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:18:11,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:18:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:18:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183615115] [2024-11-08 10:18:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:18:11,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:18:11,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:18:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:18:11,327 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:11,376 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-08 10:18:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:18:11,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-08 10:18:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:11,377 INFO L225 Difference]: With dead ends: 36 [2024-11-08 10:18:11,377 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 10:18:11,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:18:11,378 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:11,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 10:18:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-08 10:18:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-08 10:18:11,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-08 10:18:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:11,383 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-08 10:18:11,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-08 10:18:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:18:11,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:11,384 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:11,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:18:11,384 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:11,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2024-11-08 10:18:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:11,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062991215] [2024-11-08 10:18:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062991215] [2024-11-08 10:18:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062991215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673432407] [2024-11-08 10:18:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:12,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:12,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:12,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:12,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:18:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:12,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 10:18:12,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:12,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:12,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:12,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:12,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:12,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-08 10:18:12,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:12,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-08 10:18:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673432407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:12,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-11-08 10:18:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011930846] [2024-11-08 10:18:12,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:12,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 10:18:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 10:18:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:18:12,840 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:13,145 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-11-08 10:18:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 10:18:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 10:18:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:13,147 INFO L225 Difference]: With dead ends: 46 [2024-11-08 10:18:13,148 INFO L226 Difference]: Without dead ends: 42 [2024-11-08 10:18:13,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:18:13,149 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:13,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 42 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-08 10:18:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-11-08 10:18:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-08 10:18:13,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2024-11-08 10:18:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:13,155 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-08 10:18:13,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-08 10:18:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-08 10:18:13,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:13,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:13,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:18:13,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:13,357 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:13,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2024-11-08 10:18:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700294078] [2024-11-08 10:18:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700294078] [2024-11-08 10:18:13,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700294078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940901129] [2024-11-08 10:18:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:13,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:13,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:18:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:13,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 10:18:13,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:13,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:13,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:13,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-08 10:18:13,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-08 10:18:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940901129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-08 10:18:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918563999] [2024-11-08 10:18:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:13,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 10:18:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 10:18:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-08 10:18:13,588 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:13,636 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-08 10:18:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 10:18:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-08 10:18:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:13,638 INFO L225 Difference]: With dead ends: 48 [2024-11-08 10:18:13,638 INFO L226 Difference]: Without dead ends: 37 [2024-11-08 10:18:13,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:18:13,639 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:13,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-08 10:18:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-11-08 10:18:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-11-08 10:18:13,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2024-11-08 10:18:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:13,645 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-11-08 10:18:13,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-11-08 10:18:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 10:18:13,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:13,646 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:13,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:13,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 10:18:13,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:13,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:13,851 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2024-11-08 10:18:13,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:13,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138648340] [2024-11-08 10:18:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:13,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138648340] [2024-11-08 10:18:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138648340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:13,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469731137] [2024-11-08 10:18:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:13,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:13,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:18:13,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:13,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:13,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:18:13,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:14,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:14,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469731137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:14,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:14,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:18:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538297655] [2024-11-08 10:18:14,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:14,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:18:14,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:18:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:18:14,032 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:14,119 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-11-08 10:18:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:18:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 10:18:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:14,120 INFO L225 Difference]: With dead ends: 66 [2024-11-08 10:18:14,120 INFO L226 Difference]: Without dead ends: 40 [2024-11-08 10:18:14,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:18:14,120 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:14,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-08 10:18:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-08 10:18:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-08 10:18:14,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2024-11-08 10:18:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:14,126 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-08 10:18:14,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:14,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-08 10:18:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 10:18:14,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:14,127 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:14,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:14,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:14,331 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:14,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2024-11-08 10:18:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:14,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814876736] [2024-11-08 10:18:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:14,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814876736] [2024-11-08 10:18:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814876736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810538816] [2024-11-08 10:18:14,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:14,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:18:14,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 10:18:14,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:14,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 10:18:14,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:14,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:14,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:14,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:14,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-08 10:18:14,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:14,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2024-11-08 10:18:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810538816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:14,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 25 [2024-11-08 10:18:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500663043] [2024-11-08 10:18:14,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:14,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 10:18:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 10:18:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:18:14,884 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:15,202 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2024-11-08 10:18:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 10:18:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 10:18:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:15,203 INFO L225 Difference]: With dead ends: 36 [2024-11-08 10:18:15,203 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 10:18:15,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:18:15,204 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:15,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 50 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 10:18:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-08 10:18:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-08 10:18:15,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2024-11-08 10:18:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:15,209 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-08 10:18:15,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-08 10:18:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 10:18:15,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:15,210 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:15,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 10:18:15,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:15,415 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:15,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2024-11-08 10:18:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186175065] [2024-11-08 10:18:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186175065] [2024-11-08 10:18:16,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186175065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886516826] [2024-11-08 10:18:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:18:16,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:16,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:16,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:18:16,458 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:18:16,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:16,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 10:18:16,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:16,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:16,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:16,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:16,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:18:16,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:16,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:16,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:17,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-11-08 10:18:17,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:17,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 382 treesize of output 379 [2024-11-08 10:18:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:17,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886516826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:17,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:17,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 47 [2024-11-08 10:18:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253870602] [2024-11-08 10:18:17,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:17,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 10:18:17,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 10:18:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1837, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 10:18:17,549 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 47 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:18,855 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2024-11-08 10:18:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 10:18:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-08 10:18:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:18,856 INFO L225 Difference]: With dead ends: 85 [2024-11-08 10:18:18,856 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 10:18:18,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=774, Invalid=4056, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 10:18:18,858 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:18,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 104 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:18:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 10:18:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2024-11-08 10:18:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-11-08 10:18:18,864 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2024-11-08 10:18:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:18,865 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-11-08 10:18:18,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-11-08 10:18:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 10:18:18,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:18,865 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:18,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:19,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:19,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:19,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2024-11-08 10:18:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579932707] [2024-11-08 10:18:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:19,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579932707] [2024-11-08 10:18:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579932707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747162481] [2024-11-08 10:18:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:19,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:19,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:18:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:19,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 10:18:19,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:19,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:19,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:19,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-08 10:18:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:19,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:19,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:19,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:19,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747162481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:19,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:19,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-08 10:18:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151696726] [2024-11-08 10:18:19,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:19,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:19,386 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:19,479 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-11-08 10:18:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 10:18:19,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 27 [2024-11-08 10:18:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:19,480 INFO L225 Difference]: With dead ends: 80 [2024-11-08 10:18:19,480 INFO L226 Difference]: Without dead ends: 55 [2024-11-08 10:18:19,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:18:19,481 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:19,481 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-08 10:18:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2024-11-08 10:18:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-08 10:18:19,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 27 [2024-11-08 10:18:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:19,487 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-08 10:18:19,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-08 10:18:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 10:18:19,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:19,488 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:19,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 10:18:19,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:19,688 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:19,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2024-11-08 10:18:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:19,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334430888] [2024-11-08 10:18:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:19,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:18:19,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:19,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334430888] [2024-11-08 10:18:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334430888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:19,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411033167] [2024-11-08 10:18:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:18:19,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:19,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:19,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:18:19,826 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 10:18:19,826 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:19,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:18:19,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:18:19,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:18:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411033167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:19,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:18:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139555284] [2024-11-08 10:18:19,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:19,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:19,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:19,920 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:20,004 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-08 10:18:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 10:18:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-08 10:18:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:20,005 INFO L225 Difference]: With dead ends: 85 [2024-11-08 10:18:20,005 INFO L226 Difference]: Without dead ends: 49 [2024-11-08 10:18:20,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:18:20,006 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:20,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-08 10:18:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2024-11-08 10:18:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-08 10:18:20,015 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2024-11-08 10:18:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:20,018 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-08 10:18:20,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-08 10:18:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 10:18:20,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:20,019 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:20,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:20,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:20,224 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:20,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2024-11-08 10:18:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:20,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100914143] [2024-11-08 10:18:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100914143] [2024-11-08 10:18:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100914143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696880250] [2024-11-08 10:18:20,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:18:20,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:20,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:20,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:18:20,385 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 10:18:20,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:20,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:18:20,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:18:20,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:18:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696880250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:20,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:20,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:18:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963430538] [2024-11-08 10:18:20,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:20,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:20,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:20,483 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:20,585 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2024-11-08 10:18:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:18:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-08 10:18:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:20,586 INFO L225 Difference]: With dead ends: 48 [2024-11-08 10:18:20,586 INFO L226 Difference]: Without dead ends: 38 [2024-11-08 10:18:20,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:20,587 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:20,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-08 10:18:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-11-08 10:18:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-11-08 10:18:20,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2024-11-08 10:18:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:20,591 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-11-08 10:18:20,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-11-08 10:18:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 10:18:20,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:20,595 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:20,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 10:18:20,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 10:18:20,797 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:20,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2024-11-08 10:18:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238661228] [2024-11-08 10:18:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238661228] [2024-11-08 10:18:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238661228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876992764] [2024-11-08 10:18:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:18:21,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:21,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:21,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:18:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:21,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 10:18:21,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:21,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:22,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:22,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:22,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:18:22,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:22,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 10:18:22,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:22,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:22,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:22,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:23,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2024-11-08 10:18:23,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:23,282 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 12389 treesize of output 11807 [2024-11-08 10:18:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876992764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:23,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 63 [2024-11-08 10:18:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656771610] [2024-11-08 10:18:23,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:23,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 10:18:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 10:18:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3472, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 10:18:23,680 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:24,943 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2024-11-08 10:18:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 10:18:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 10:18:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:24,944 INFO L225 Difference]: With dead ends: 84 [2024-11-08 10:18:24,944 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 10:18:24,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=747, Invalid=5259, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 10:18:24,945 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:24,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 10:18:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 10:18:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2024-11-08 10:18:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2024-11-08 10:18:24,952 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2024-11-08 10:18:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:24,953 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2024-11-08 10:18:24,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2024-11-08 10:18:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 10:18:24,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:24,954 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:24,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 10:18:25,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:25,158 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:25,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2024-11-08 10:18:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36657841] [2024-11-08 10:18:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36657841] [2024-11-08 10:18:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36657841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051256101] [2024-11-08 10:18:25,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:25,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:25,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:25,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:18:25,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:25,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:25,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 10:18:25,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:25,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:25,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:25,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-08 10:18:25,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:25,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2024-11-08 10:18:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:25,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:25,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:25,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:25,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051256101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:25,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-11-08 10:18:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217822416] [2024-11-08 10:18:25,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:25,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 10:18:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 10:18:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-08 10:18:25,572 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:25,709 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-11-08 10:18:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 10:18:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 10:18:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:25,710 INFO L225 Difference]: With dead ends: 77 [2024-11-08 10:18:25,710 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 10:18:25,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:18:25,711 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:25,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 10:18:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-11-08 10:18:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-08 10:18:25,732 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2024-11-08 10:18:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:25,732 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-08 10:18:25,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-08 10:18:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 10:18:25,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:25,733 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:25,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 10:18:25,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 10:18:25,934 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:25,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2024-11-08 10:18:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:25,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41825876] [2024-11-08 10:18:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:25,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:18:26,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41825876] [2024-11-08 10:18:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41825876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467614286] [2024-11-08 10:18:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:26,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:26,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:26,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 10:18:26,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:26,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:26,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:18:26,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:18:26,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:18:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467614286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:26,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:18:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93119721] [2024-11-08 10:18:26,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:26,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:18:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:18:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:18:26,392 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:26,503 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2024-11-08 10:18:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 10:18:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 10:18:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:26,504 INFO L225 Difference]: With dead ends: 95 [2024-11-08 10:18:26,504 INFO L226 Difference]: Without dead ends: 58 [2024-11-08 10:18:26,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:26,504 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:26,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 47 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-08 10:18:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-11-08 10:18:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-08 10:18:26,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2024-11-08 10:18:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:26,515 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-08 10:18:26,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-08 10:18:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 10:18:26,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:26,516 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:26,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 10:18:26,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:18:26,720 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:26,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2024-11-08 10:18:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:26,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011962578] [2024-11-08 10:18:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:26,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011962578] [2024-11-08 10:18:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011962578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185558499] [2024-11-08 10:18:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:26,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:26,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 10:18:26,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 10:18:26,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:26,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-08 10:18:26,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:26,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:27,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:27,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:27,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:18:27,135 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:27,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 10:18:27,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:27,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:27,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:27,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 47 [2024-11-08 10:18:27,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-08 10:18:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:18:27,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:28,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 99 [2024-11-08 10:18:28,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:28,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1447 treesize of output 1433 [2024-11-08 10:18:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:18:28,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185558499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:28,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:28,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 51 [2024-11-08 10:18:28,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031408622] [2024-11-08 10:18:28,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:28,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 10:18:28,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 10:18:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 10:18:28,280 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:29,318 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-11-08 10:18:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 10:18:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 10:18:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:29,319 INFO L225 Difference]: With dead ends: 56 [2024-11-08 10:18:29,319 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 10:18:29,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=644, Invalid=4758, Unknown=0, NotChecked=0, Total=5402 [2024-11-08 10:18:29,321 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:29,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 132 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:18:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 10:18:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-08 10:18:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-11-08 10:18:29,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2024-11-08 10:18:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:29,327 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-11-08 10:18:29,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-11-08 10:18:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 10:18:29,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:29,327 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:29,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 10:18:29,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 10:18:29,532 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:29,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2024-11-08 10:18:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:29,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372502946] [2024-11-08 10:18:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372502946] [2024-11-08 10:18:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372502946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464212825] [2024-11-08 10:18:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:18:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:31,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:31,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 10:18:31,273 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:18:31,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:31,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-08 10:18:31,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:31,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:31,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:31,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:31,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:18:31,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:31,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 10:18:31,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:31,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-08 10:18:32,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:32,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:32,352 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 [2024-11-08 10:18:32,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:32,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:33,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 196 [2024-11-08 10:18:33,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:33,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1679780 treesize of output 1622549 [2024-11-08 10:18:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464212825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:34,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:34,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 83 [2024-11-08 10:18:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912274744] [2024-11-08 10:18:34,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:34,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-08 10:18:34,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-08 10:18:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=6000, Unknown=0, NotChecked=0, Total=6806 [2024-11-08 10:18:34,462 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 83 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 83 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:39,135 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2024-11-08 10:18:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 10:18:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 83 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 41 [2024-11-08 10:18:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:39,136 INFO L225 Difference]: With dead ends: 131 [2024-11-08 10:18:39,136 INFO L226 Difference]: Without dead ends: 112 [2024-11-08 10:18:39,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4981 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1986, Invalid=13764, Unknown=0, NotChecked=0, Total=15750 [2024-11-08 10:18:39,139 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:39,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 130 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 10:18:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-08 10:18:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-11-08 10:18:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2024-11-08 10:18:39,150 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 41 [2024-11-08 10:18:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:39,150 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2024-11-08 10:18:39,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 83 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2024-11-08 10:18:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 10:18:39,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:39,151 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:39,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 10:18:39,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 10:18:39,356 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2024-11-08 10:18:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440792894] [2024-11-08 10:18:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:18:39,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440792894] [2024-11-08 10:18:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440792894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585985157] [2024-11-08 10:18:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:39,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:39,720 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:39,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 10:18:39,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-08 10:18:39,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:39,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-08 10:18:39,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:39,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 10:18:39,915 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2024-11-08 10:18:39,915 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 35 treesize of output 26 [2024-11-08 10:18:39,944 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2024-11-08 10:18:39,944 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 35 treesize of output 26 [2024-11-08 10:18:39,965 INFO L349 Elim1Store]: treesize reduction 16, result has 57.9 percent of original size [2024-11-08 10:18:39,966 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 35 treesize of output 38 [2024-11-08 10:18:40,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:40,016 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 35 treesize of output 23 [2024-11-08 10:18:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:40,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:40,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:40,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:40,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585985157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:40,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:40,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 46 [2024-11-08 10:18:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566085327] [2024-11-08 10:18:40,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:40,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-08 10:18:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-08 10:18:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 10:18:40,632 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:42,033 INFO L93 Difference]: Finished difference Result 181 states and 228 transitions. [2024-11-08 10:18:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-08 10:18:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-08 10:18:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:42,035 INFO L225 Difference]: With dead ends: 181 [2024-11-08 10:18:42,035 INFO L226 Difference]: Without dead ends: 143 [2024-11-08 10:18:42,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1421, Invalid=8281, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 10:18:42,038 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:42,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 133 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:18:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-08 10:18:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2024-11-08 10:18:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 102 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2024-11-08 10:18:42,063 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 41 [2024-11-08 10:18:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:42,064 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2024-11-08 10:18:42,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2024-11-08 10:18:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 10:18:42,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:42,065 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:42,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:42,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:42,268 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:42,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 11 times [2024-11-08 10:18:42,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:42,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566022265] [2024-11-08 10:18:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 10:18:42,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566022265] [2024-11-08 10:18:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566022265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724039296] [2024-11-08 10:18:42,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:18:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:42,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:42,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 10:18:42,581 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 10:18:42,581 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:42,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:18:42,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 10:18:42,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 10:18:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724039296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:42,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:42,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 10:18:42,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302231422] [2024-11-08 10:18:42,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:42,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:18:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:18:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:42,751 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2024-11-08 10:18:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:42,932 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2024-11-08 10:18:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:18:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 43 [2024-11-08 10:18:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:42,933 INFO L225 Difference]: With dead ends: 161 [2024-11-08 10:18:42,934 INFO L226 Difference]: Without dead ends: 100 [2024-11-08 10:18:42,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:18:42,934 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:42,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 56 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-08 10:18:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2024-11-08 10:18:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2024-11-08 10:18:42,949 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 43 [2024-11-08 10:18:42,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:42,949 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2024-11-08 10:18:42,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2024-11-08 10:18:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2024-11-08 10:18:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 10:18:42,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:42,951 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:42,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 10:18:43,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 10:18:43,152 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:43,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2113009991, now seen corresponding path program 12 times [2024-11-08 10:18:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:43,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371364212] [2024-11-08 10:18:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:18:43,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371364212] [2024-11-08 10:18:43,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371364212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650682774] [2024-11-08 10:18:43,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:18:43,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:43,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:43,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:43,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 10:18:43,508 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-08 10:18:43,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:43,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 10:18:43,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:18:43,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650682774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:43,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:43,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 26 [2024-11-08 10:18:43,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874439888] [2024-11-08 10:18:43,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:43,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:18:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:18:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2024-11-08 10:18:43,768 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:44,155 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2024-11-08 10:18:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 10:18:44,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-08 10:18:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:44,156 INFO L225 Difference]: With dead ends: 133 [2024-11-08 10:18:44,156 INFO L226 Difference]: Without dead ends: 106 [2024-11-08 10:18:44,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 10:18:44,157 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:44,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 65 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:18:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-08 10:18:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2024-11-08 10:18:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2024-11-08 10:18:44,172 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 45 [2024-11-08 10:18:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:44,172 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2024-11-08 10:18:44,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2024-11-08 10:18:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 10:18:44,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:44,173 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:44,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 10:18:44,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 10:18:44,373 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:44,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 13 times [2024-11-08 10:18:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:44,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943140617] [2024-11-08 10:18:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:44,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:46,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943140617] [2024-11-08 10:18:46,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943140617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:46,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966629972] [2024-11-08 10:18:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:18:46,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:46,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:46,546 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 10:18:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:46,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-08 10:18:46,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:46,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:18:46,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:46,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:46,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:18:47,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:47,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 10:18:47,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:47,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-08 10:18:47,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-08 10:18:47,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:47,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:47,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:48,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:48,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:18:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:48,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:50,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 283 [2024-11-08 10:18:50,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:50,511 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 731499499 treesize of output 712625317 [2024-11-08 10:18:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966629972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:51,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:51,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 96 [2024-11-08 10:18:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645096783] [2024-11-08 10:18:51,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:51,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-08 10:18:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-08 10:18:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=8282, Unknown=0, NotChecked=0, Total=9120 [2024-11-08 10:18:51,677 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:59,802 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2024-11-08 10:18:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-08 10:18:59,802 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 10:18:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:59,803 INFO L225 Difference]: With dead ends: 167 [2024-11-08 10:18:59,803 INFO L226 Difference]: Without dead ends: 147 [2024-11-08 10:18:59,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2530, Invalid=20120, Unknown=0, NotChecked=0, Total=22650 [2024-11-08 10:18:59,805 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:59,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 198 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-08 10:18:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-08 10:18:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 95. [2024-11-08 10:18:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2024-11-08 10:18:59,823 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 48 [2024-11-08 10:18:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:59,823 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2024-11-08 10:18:59,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 96 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2024-11-08 10:18:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 10:18:59,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:59,824 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:59,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-08 10:19:00,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:00,029 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:00,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1218867985, now seen corresponding path program 4 times [2024-11-08 10:19:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889623709] [2024-11-08 10:19:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 10:19:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889623709] [2024-11-08 10:19:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889623709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791102585] [2024-11-08 10:19:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:19:00,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:00,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:00,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 10:19:00,490 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:19:00,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:00,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 10:19:00,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:00,500 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 [2024-11-08 10:19:00,582 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2024-11-08 10:19:00,583 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 [2024-11-08 10:19:00,660 INFO L349 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2024-11-08 10:19:00,660 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 [2024-11-08 10:19:00,782 INFO L349 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2024-11-08 10:19:00,782 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 [2024-11-08 10:19:00,972 INFO L349 Elim1Store]: treesize reduction 127, result has 29.8 percent of original size [2024-11-08 10:19:00,973 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 14 case distinctions, treesize of input 92 treesize of output 108 [2024-11-08 10:19:01,162 INFO L349 Elim1Store]: treesize reduction 33, result has 23.3 percent of original size [2024-11-08 10:19:01,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 43 [2024-11-08 10:19:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 10:19:01,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 10:19:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791102585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:01,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:01,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 40 [2024-11-08 10:19:01,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251428023] [2024-11-08 10:19:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:01,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 10:19:01,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 10:19:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:19:01,501 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:02,911 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2024-11-08 10:19:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-08 10:19:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 10:19:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:02,912 INFO L225 Difference]: With dead ends: 138 [2024-11-08 10:19:02,912 INFO L226 Difference]: Without dead ends: 119 [2024-11-08 10:19:02,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=982, Invalid=4718, Unknown=0, NotChecked=0, Total=5700 [2024-11-08 10:19:02,913 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:02,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 88 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:19:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-08 10:19:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2024-11-08 10:19:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2024-11-08 10:19:02,937 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 48 [2024-11-08 10:19:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:02,937 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2024-11-08 10:19:02,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2024-11-08 10:19:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 10:19:02,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:02,938 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:02,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-08 10:19:03,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:03,139 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:03,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2064820435, now seen corresponding path program 14 times [2024-11-08 10:19:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753443368] [2024-11-08 10:19:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 10:19:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753443368] [2024-11-08 10:19:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753443368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866372252] [2024-11-08 10:19:03,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:19:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:03,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:03,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 10:19:03,509 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:19:03,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:03,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 10:19:03,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 10:19:03,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 10:19:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866372252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:03,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-08 10:19:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082942933] [2024-11-08 10:19:03,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:03,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:19:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:19:03,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:19:03,691 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:03,848 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2024-11-08 10:19:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 10:19:03,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-08 10:19:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:03,849 INFO L225 Difference]: With dead ends: 136 [2024-11-08 10:19:03,849 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 10:19:03,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:19:03,850 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:03,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:19:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 10:19:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-08 10:19:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-08 10:19:03,866 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 50 [2024-11-08 10:19:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:03,866 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-08 10:19:03,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-08 10:19:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 10:19:03,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:03,867 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:03,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 10:19:04,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:04,067 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:04,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1899679235, now seen corresponding path program 15 times [2024-11-08 10:19:04,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:04,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648006668] [2024-11-08 10:19:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:04,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648006668] [2024-11-08 10:19:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648006668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203099176] [2024-11-08 10:19:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:19:06,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:06,946 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:06,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 10:19:07,130 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 10:19:07,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:07,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-08 10:19:07,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:07,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:19:07,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:07,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:07,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2024-11-08 10:19:07,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:07,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 10:19:07,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:07,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 41 [2024-11-08 10:19:07,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:07,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 51 [2024-11-08 10:19:08,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:08,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 61 [2024-11-08 10:19:08,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:08,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:08,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:08,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-08 10:19:08,968 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 41 treesize of output 29 [2024-11-08 10:19:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:09,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:09,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 92 treesize of output 166 [2024-11-08 10:19:09,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 135 [2024-11-08 10:19:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:19:09,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:12,770 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 250 treesize of output 232 [2024-11-08 10:19:12,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:12,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 5846126 treesize of output 5805293 [2024-11-08 10:19:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 10:19:13,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203099176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:13,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:13,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 38, 37] total 111 [2024-11-08 10:19:13,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535468995] [2024-11-08 10:19:13,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:13,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-08 10:19:13,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-08 10:19:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=11441, Unknown=0, NotChecked=0, Total=12210 [2024-11-08 10:19:13,510 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:25,364 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2024-11-08 10:19:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-11-08 10:19:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-08 10:19:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:25,366 INFO L225 Difference]: With dead ends: 177 [2024-11-08 10:19:25,367 INFO L226 Difference]: Without dead ends: 157 [2024-11-08 10:19:25,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10053 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=3212, Invalid=31944, Unknown=0, NotChecked=0, Total=35156 [2024-11-08 10:19:25,368 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 240 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 4225 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 4225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:25,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 262 Invalid, 4777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 4225 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-08 10:19:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-08 10:19:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 101. [2024-11-08 10:19:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2024-11-08 10:19:25,399 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 55 [2024-11-08 10:19:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:25,399 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2024-11-08 10:19:25,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 111 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2024-11-08 10:19:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-08 10:19:25,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:25,400 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:25,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 10:19:25,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-08 10:19:25,604 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:25,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:25,605 INFO L85 PathProgramCache]: Analyzing trace with hash 589849727, now seen corresponding path program 5 times [2024-11-08 10:19:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:25,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928841938] [2024-11-08 10:19:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:25,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 24 proven. 61 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 10:19:25,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:25,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928841938] [2024-11-08 10:19:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928841938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:25,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094634461] [2024-11-08 10:19:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:19:25,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:25,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:25,930 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:25,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 10:19:26,530 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-08 10:19:26,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:26,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-08 10:19:26,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:26,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 10:19:26,569 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2024-11-08 10:19:26,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2024-11-08 10:19:26,643 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2024-11-08 10:19:26,644 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 38 treesize of output 36 [2024-11-08 10:19:26,692 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2024-11-08 10:19:26,693 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 42 treesize of output 38 [2024-11-08 10:19:26,745 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2024-11-08 10:19:26,745 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 42 treesize of output 38 [2024-11-08 10:19:26,796 INFO L349 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2024-11-08 10:19:26,796 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 42 treesize of output 38 [2024-11-08 10:19:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-08 10:19:26,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:26,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:19:26,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:19:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-08 10:19:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094634461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:26,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:26,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 24 [2024-11-08 10:19:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117945968] [2024-11-08 10:19:26,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:26,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 10:19:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 10:19:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:19:26,900 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:27,234 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2024-11-08 10:19:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 10:19:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-08 10:19:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:27,235 INFO L225 Difference]: With dead ends: 140 [2024-11-08 10:19:27,235 INFO L226 Difference]: Without dead ends: 106 [2024-11-08 10:19:27,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2024-11-08 10:19:27,236 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:27,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 90 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:19:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-08 10:19:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-11-08 10:19:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 95 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-08 10:19:27,263 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 55 [2024-11-08 10:19:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:27,263 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-08 10:19:27,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-08 10:19:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-08 10:19:27,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:27,263 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:27,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 10:19:27,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 10:19:27,464 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:27,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -177410273, now seen corresponding path program 16 times [2024-11-08 10:19:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003232939] [2024-11-08 10:19:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-08 10:19:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003232939] [2024-11-08 10:19:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003232939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475793374] [2024-11-08 10:19:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:19:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:27,622 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:27,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 10:19:27,720 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:19:27,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:27,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 10:19:27,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 10:19:27,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-08 10:19:27,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475793374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:27,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:27,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-08 10:19:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50180172] [2024-11-08 10:19:27,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:27,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:19:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:19:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-08 10:19:27,958 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:28,157 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2024-11-08 10:19:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 10:19:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-08 10:19:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:28,158 INFO L225 Difference]: With dead ends: 145 [2024-11-08 10:19:28,159 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 10:19:28,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-08 10:19:28,159 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:28,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:19:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 10:19:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2024-11-08 10:19:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 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) [2024-11-08 10:19:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-11-08 10:19:28,179 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 57 [2024-11-08 10:19:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:28,179 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-11-08 10:19:28,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-11-08 10:19:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 10:19:28,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:28,180 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:28,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 10:19:28,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:28,381 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:28,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:28,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2059006129, now seen corresponding path program 17 times [2024-11-08 10:19:28,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:28,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299682742] [2024-11-08 10:19:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 10:19:28,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299682742] [2024-11-08 10:19:28,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299682742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337879736] [2024-11-08 10:19:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:19:28,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:28,548 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:28,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 10:19:28,980 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 10:19:28,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:28,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 10:19:28,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 10:19:29,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 10:19:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337879736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:29,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:29,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-08 10:19:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409232283] [2024-11-08 10:19:29,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:29,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:19:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:19:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-08 10:19:29,216 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:29,477 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-08 10:19:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 10:19:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-08 10:19:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:29,478 INFO L225 Difference]: With dead ends: 73 [2024-11-08 10:19:29,478 INFO L226 Difference]: Without dead ends: 69 [2024-11-08 10:19:29,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:19:29,479 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 134 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:29,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 37 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:19:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-08 10:19:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-11-08 10:19:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-11-08 10:19:29,499 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 60 [2024-11-08 10:19:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:29,500 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-11-08 10:19:29,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:19:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-11-08 10:19:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 10:19:29,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:29,500 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:29,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-08 10:19:29,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:29,701 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:29,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1328267249, now seen corresponding path program 18 times [2024-11-08 10:19:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:29,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232068805] [2024-11-08 10:19:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:29,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232068805] [2024-11-08 10:19:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232068805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618311254] [2024-11-08 10:19:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:19:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:33,253 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:33,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 10:19:33,671 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-08 10:19:33,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:33,675 WARN L253 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-08 10:19:33,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:33,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:19:33,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 10:19:33,868 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 24 [2024-11-08 10:19:33,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:33,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2024-11-08 10:19:34,418 INFO L349 Elim1Store]: treesize reduction 72, result has 39.0 percent of original size [2024-11-08 10:19:34,419 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 9 case distinctions, treesize of input 52 treesize of output 65 [2024-11-08 10:19:34,758 INFO L349 Elim1Store]: treesize reduction 96, result has 32.4 percent of original size [2024-11-08 10:19:34,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 71 treesize of output 87 [2024-11-08 10:19:35,162 INFO L349 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2024-11-08 10:19:35,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 87 treesize of output 106 [2024-11-08 10:19:35,650 INFO L349 Elim1Store]: treesize reduction 144, result has 24.2 percent of original size [2024-11-08 10:19:35,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 103 treesize of output 125 [2024-11-08 10:19:36,102 INFO L349 Elim1Store]: treesize reduction 150, result has 31.8 percent of original size [2024-11-08 10:19:36,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 31 case distinctions, treesize of input 118 treesize of output 167 [2024-11-08 10:19:36,878 INFO L349 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2024-11-08 10:19:36,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 170 treesize of output 190 [2024-11-08 10:19:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:37,606 INFO L349 Elim1Store]: treesize reduction 96, result has 32.4 percent of original size [2024-11-08 10:19:37,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 39 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 48 case distinctions, treesize of input 112 treesize of output 143 [2024-11-08 10:19:38,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:38,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-08 10:19:38,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-08 10:19:38,809 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 41 treesize of output 29 [2024-11-08 10:19:39,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2024-11-08 10:19:39,360 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 59 treesize of output 47 [2024-11-08 10:19:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:39,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:39,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 117 treesize of output 251 [2024-11-08 10:19:39,766 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 190 treesize of output 135 [2024-11-08 10:19:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 31 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:19:40,240 INFO L311 TraceCheckSpWp]: Computing backward predicates...