./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.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 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:06:57,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:06:57,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:06:57,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:06:57,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:06:57,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:06:57,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:06:57,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:06:57,426 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:06:57,427 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:06:57,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:06:57,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:06:57,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:06:57,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:06:57,429 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:06:57,429 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:06:57,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:06:57,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:06:57,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:06:57,430 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:06:57,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:06:57,434 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:06:57,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:06:57,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:06:57,435 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:06:57,435 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:06:57,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:06:57,436 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:06:57,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:06:57,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:06:57,436 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:06:57,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:06:57,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:06:57,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:06:57,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:06:57,437 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:06:57,438 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:06:57,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:06:57,438 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:06:57,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:06:57,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:06:57,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:06:57,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 371b46898ac196d32c6a3ef4c51b315e7fba4a376d0f69ff343a10a3b7c63d98 [2024-10-12 15:06:57,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:06:57,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:06:57,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:06:57,738 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:06:57,738 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:06:57,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c [2024-10-12 15:06:59,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:06:59,342 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:06:59,343 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c [2024-10-12 15:06:59,350 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f0eff53c/c724385a085b414dabfe10a7712ac031/FLAGafe84cd93 [2024-10-12 15:06:59,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f0eff53c/c724385a085b414dabfe10a7712ac031 [2024-10-12 15:06:59,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:06:59,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:06:59,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:06:59,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:06:59,372 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:06:59,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,373 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5274d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59, skipping insertion in model container [2024-10-12 15:06:59,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,395 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:06:59,572 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2024-10-12 15:06:59,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:06:59,599 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:06:59,610 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c[588,601] [2024-10-12 15:06:59,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:06:59,637 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:06:59,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59 WrapperNode [2024-10-12 15:06:59,638 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:06:59,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:06:59,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:06:59,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:06:59,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,683 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2024-10-12 15:06:59,683 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:06:59,684 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:06:59,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:06:59,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:06:59,696 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,698 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,712 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 9, 6]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2024-10-12 15:06:59,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,713 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:06:59,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:06:59,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:06:59,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:06:59,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (1/1) ... [2024-10-12 15:06:59,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:06:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:06:59,770 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) [2024-10-12 15:06:59,772 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 [2024-10-12 15:06:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:06:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:06:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:06:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:06:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 15:06:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 15:06:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:06:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:06:59,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:06:59,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:06:59,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 15:06:59,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 15:06:59,880 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:06:59,882 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:07:00,076 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-12 15:07:00,077 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:07:00,099 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:07:00,099 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 15:07:00,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:07:00 BoogieIcfgContainer [2024-10-12 15:07:00,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:07:00,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:07:00,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:07:00,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:07:00,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:06:59" (1/3) ... [2024-10-12 15:07:00,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5079a031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:07:00, skipping insertion in model container [2024-10-12 15:07:00,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:06:59" (2/3) ... [2024-10-12 15:07:00,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5079a031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:07:00, skipping insertion in model container [2024-10-12 15:07:00,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:07:00" (3/3) ... [2024-10-12 15:07:00,114 INFO L112 eAbstractionObserver]: Analyzing ICFG s32if.c [2024-10-12 15:07:00,132 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:07:00,133 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:07:00,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:07:00,196 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;@6c3d5393, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:07:00,196 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:07:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) [2024-10-12 15:07:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:07:00,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:00,204 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:00,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:00,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 845365045, now seen corresponding path program 1 times [2024-10-12 15:07:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:00,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638743399] [2024-10-12 15:07:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:00,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638743399] [2024-10-12 15:07:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638743399] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:07:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:07:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:07:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455121992] [2024-10-12 15:07:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:07:00,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:07:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:07:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:07:00,435 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:00,453 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2024-10-12 15:07:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:07:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 15:07:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:00,469 INFO L225 Difference]: With dead ends: 37 [2024-10-12 15:07:00,469 INFO L226 Difference]: Without dead ends: 17 [2024-10-12 15:07:00,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:07:00,475 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:00,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:07:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-12 15:07:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-12 15:07:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-10-12 15:07:00,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2024-10-12 15:07:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:00,502 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-10-12 15:07:00,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-10-12 15:07:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:07:00,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:00,503 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:00,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:07:00,503 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:00,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 452010334, now seen corresponding path program 1 times [2024-10-12 15:07:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992195238] [2024-10-12 15:07:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992195238] [2024-10-12 15:07:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992195238] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:07:00,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:07:00,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:07:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728500865] [2024-10-12 15:07:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:07:00,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:07:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:07:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:07:00,688 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:00,766 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2024-10-12 15:07:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:07:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 15:07:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:00,767 INFO L225 Difference]: With dead ends: 36 [2024-10-12 15:07:00,768 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 15:07:00,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:07:00,770 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:00,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 15:07:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2024-10-12 15:07:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 15:07:00,778 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-12 15:07:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:00,778 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 15:07:00,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 15:07:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:00,779 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:00,779 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:00,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:07:00,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:00,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash 678183220, now seen corresponding path program 1 times [2024-10-12 15:07:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:00,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443661937] [2024-10-12 15:07:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443661937] [2024-10-12 15:07:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443661937] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391120463] [2024-10-12 15:07:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:01,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:01,414 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) [2024-10-12 15:07:01,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:07:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:01,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 15:07:01,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:01,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:01,759 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 [2024-10-12 15:07:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:01,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391120463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:01,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-10-12 15:07:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13079089] [2024-10-12 15:07:01,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:01,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:07:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:07:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:07:01,973 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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) [2024-10-12 15:07:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:02,269 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-10-12 15:07:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 19 [2024-10-12 15:07:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:02,270 INFO L225 Difference]: With dead ends: 40 [2024-10-12 15:07:02,270 INFO L226 Difference]: Without dead ends: 36 [2024-10-12 15:07:02,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-10-12 15:07:02,275 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:02,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-12 15:07:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-10-12 15:07:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-12 15:07:02,285 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-10-12 15:07:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:02,285 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-12 15:07:02,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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) [2024-10-12 15:07:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-12 15:07:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:02,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:02,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:02,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 15:07:02,487 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 [2024-10-12 15:07:02,488 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:02,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash 735441522, now seen corresponding path program 1 times [2024-10-12 15:07:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098953784] [2024-10-12 15:07:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098953784] [2024-10-12 15:07:02,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098953784] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576136733] [2024-10-12 15:07:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:02,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:02,779 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) [2024-10-12 15:07:02,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:07:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:02,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:02,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:02,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:02,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:02,997 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 27 treesize of output 23 [2024-10-12 15:07:03,007 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:03,008 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 24 treesize of output 16 [2024-10-12 15:07:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576136733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:03,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-10-12 15:07:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400750010] [2024-10-12 15:07:03,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:03,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:03,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:03,022 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:03,185 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2024-10-12 15:07:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:07:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) Word has length 19 [2024-10-12 15:07:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:03,187 INFO L225 Difference]: With dead ends: 83 [2024-10-12 15:07:03,187 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 15:07:03,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:07:03,190 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:03,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 62 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 15:07:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2024-10-12 15:07:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2024-10-12 15:07:03,205 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 19 [2024-10-12 15:07:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:03,205 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2024-10-12 15:07:03,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2024-10-12 15:07:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:03,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:03,208 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:03,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 15:07:03,409 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 [2024-10-12 15:07:03,409 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:03,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1436506100, now seen corresponding path program 1 times [2024-10-12 15:07:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:03,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791002510] [2024-10-12 15:07:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:03,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:03,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:03,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791002510] [2024-10-12 15:07:03,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791002510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:03,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156885416] [2024-10-12 15:07:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:03,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:03,582 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) [2024-10-12 15:07:03,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:07:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:03,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 15:07:03,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:03,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:03,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:03,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-12 15:07:03,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-12 15:07:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156885416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:03,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:03,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-12 15:07:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640837752] [2024-10-12 15:07:03,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:03,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 15:07:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:03,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 15:07:03,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-12 15:07:03,712 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:03,803 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2024-10-12 15:07:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:07:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-12 15:07:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:03,804 INFO L225 Difference]: With dead ends: 75 [2024-10-12 15:07:03,804 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 15:07:03,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:07:03,805 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:03,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 15:07:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2024-10-12 15:07:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2024-10-12 15:07:03,820 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2024-10-12 15:07:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:03,821 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2024-10-12 15:07:03,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2024-10-12 15:07:03,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 15:07:03,822 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:03,822 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:03,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 15:07:04,022 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 [2024-10-12 15:07:04,023 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:04,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1950697993, now seen corresponding path program 2 times [2024-10-12 15:07:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:04,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558395385] [2024-10-12 15:07:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:04,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558395385] [2024-10-12 15:07:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558395385] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209487683] [2024-10-12 15:07:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:04,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:04,133 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) [2024-10-12 15:07:04,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:07:04,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:04,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:04,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:07:04,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209487683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:04,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:04,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:07:04,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379653067] [2024-10-12 15:07:04,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:04,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:07:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:07:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:07:04,299 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:04,445 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2024-10-12 15:07:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:07:04,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) Word has length 20 [2024-10-12 15:07:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:04,447 INFO L225 Difference]: With dead ends: 82 [2024-10-12 15:07:04,447 INFO L226 Difference]: Without dead ends: 72 [2024-10-12 15:07:04,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:07:04,448 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:04,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-12 15:07:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2024-10-12 15:07:04,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2024-10-12 15:07:04,458 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2024-10-12 15:07:04,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:04,459 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2024-10-12 15:07:04,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2024-10-12 15:07:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:07:04,460 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:04,460 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:04,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 15:07:04,663 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 [2024-10-12 15:07:04,664 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:04,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1769185541, now seen corresponding path program 3 times [2024-10-12 15:07:04,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:04,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617926896] [2024-10-12 15:07:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617926896] [2024-10-12 15:07:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617926896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224313439] [2024-10-12 15:07:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:04,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:04,763 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) [2024-10-12 15:07:04,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:07:04,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:07:04,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:04,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:07:04,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:04,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224313439] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:04,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:04,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:07:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818433469] [2024-10-12 15:07:04,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:04,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:07:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:07:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:07:04,937 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:05,030 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-10-12 15:07:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:07:05,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-12 15:07:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:05,032 INFO L225 Difference]: With dead ends: 74 [2024-10-12 15:07:05,032 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 15:07:05,033 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 [2024-10-12 15:07:05,033 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:05,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 15:07:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2024-10-12 15:07:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-12 15:07:05,043 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-10-12 15:07:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:05,043 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-12 15:07:05,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-12 15:07:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:05,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:05,044 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:05,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 15:07:05,248 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 [2024-10-12 15:07:05,249 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:05,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1237862050, now seen corresponding path program 4 times [2024-10-12 15:07:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753089289] [2024-10-12 15:07:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:05,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:05,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753089289] [2024-10-12 15:07:05,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753089289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:05,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730089638] [2024-10-12 15:07:05,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:07:05,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:05,770 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) [2024-10-12 15:07:05,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 15:07:05,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:07:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:05,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:07:05,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:05,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:06,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:06,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:06,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730089638] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:06,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:06,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2024-10-12 15:07:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945583994] [2024-10-12 15:07:06,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:06,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-12 15:07:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-12 15:07:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 15:07:06,738 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 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) [2024-10-12 15:07:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:07,592 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2024-10-12 15:07:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:07:07,593 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 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) Word has length 26 [2024-10-12 15:07:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:07,594 INFO L225 Difference]: With dead ends: 83 [2024-10-12 15:07:07,594 INFO L226 Difference]: Without dead ends: 74 [2024-10-12 15:07:07,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2024-10-12 15:07:07,596 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:07,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 86 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 15:07:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-12 15:07:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-10-12 15:07:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-10-12 15:07:07,637 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 26 [2024-10-12 15:07:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:07,637 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-10-12 15:07:07,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 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) [2024-10-12 15:07:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-10-12 15:07:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:07,638 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:07,638 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] [2024-10-12 15:07:07,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 15:07:07,839 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 [2024-10-12 15:07:07,839 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:07,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1180603748, now seen corresponding path program 1 times [2024-10-12 15:07:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124655747] [2024-10-12 15:07:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:07:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:08,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124655747] [2024-10-12 15:07:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124655747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28477665] [2024-10-12 15:07:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:08,141 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) [2024-10-12 15:07:08,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 15:07:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:08,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 15:07:08,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:08,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:07:08,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:08,374 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 29 treesize of output 25 [2024-10-12 15:07:08,379 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:08,379 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 26 treesize of output 16 [2024-10-12 15:07:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:07:08,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28477665] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:08,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:08,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2024-10-12 15:07:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321898375] [2024-10-12 15:07:08,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:08,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 15:07:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 15:07:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-10-12 15:07:08,409 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:08,632 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-10-12 15:07:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:07:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2024-10-12 15:07:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:08,634 INFO L225 Difference]: With dead ends: 102 [2024-10-12 15:07:08,634 INFO L226 Difference]: Without dead ends: 95 [2024-10-12 15:07:08,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-10-12 15:07:08,635 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:08,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-12 15:07:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2024-10-12 15:07:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 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) [2024-10-12 15:07:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-10-12 15:07:08,650 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 26 [2024-10-12 15:07:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:08,651 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-10-12 15:07:08,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-10-12 15:07:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:08,652 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:08,652 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:08,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 15:07:08,856 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 [2024-10-12 15:07:08,857 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:08,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2103246298, now seen corresponding path program 1 times [2024-10-12 15:07:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79337601] [2024-10-12 15:07:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79337601] [2024-10-12 15:07:09,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79337601] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507306756] [2024-10-12 15:07:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:09,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:09,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:09,134 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) [2024-10-12 15:07:09,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 15:07:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:09,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:09,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:09,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:09,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-12 15:07:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:09,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:09,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-12 15:07:09,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-12 15:07:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507306756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:09,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:09,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-12 15:07:09,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619963358] [2024-10-12 15:07:09,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:09,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:09,327 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:09,470 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2024-10-12 15:07:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:07:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-12 15:07:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:09,473 INFO L225 Difference]: With dead ends: 109 [2024-10-12 15:07:09,473 INFO L226 Difference]: Without dead ends: 78 [2024-10-12 15:07:09,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:07:09,474 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:09,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-12 15:07:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2024-10-12 15:07:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-12 15:07:09,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2024-10-12 15:07:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:09,501 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-12 15:07:09,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-12 15:07:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 15:07:09,504 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:09,504 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:09,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 15:07:09,704 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 [2024-10-12 15:07:09,705 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:09,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -939265221, now seen corresponding path program 5 times [2024-10-12 15:07:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024351966] [2024-10-12 15:07:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024351966] [2024-10-12 15:07:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024351966] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901003701] [2024-10-12 15:07:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:07:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:09,833 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) [2024-10-12 15:07:09,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 15:07:09,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-12 15:07:09,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:09,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:07:09,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:10,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901003701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:10,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:07:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574658182] [2024-10-12 15:07:10,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:10,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:10,073 INFO L87 Difference]: Start difference. First operand 69 states and 85 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) [2024-10-12 15:07:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:10,303 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2024-10-12 15:07:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:10,304 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 27 [2024-10-12 15:07:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:10,305 INFO L225 Difference]: With dead ends: 112 [2024-10-12 15:07:10,305 INFO L226 Difference]: Without dead ends: 97 [2024-10-12 15:07:10,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:10,306 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:10,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 28 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-12 15:07:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2024-10-12 15:07:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-10-12 15:07:10,328 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2024-10-12 15:07:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:10,329 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-10-12 15:07:10,330 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) [2024-10-12 15:07:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-10-12 15:07:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 15:07:10,330 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:10,330 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:10,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:10,531 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 [2024-10-12 15:07:10,531 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:10,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 979910811, now seen corresponding path program 6 times [2024-10-12 15:07:10,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:10,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947704357] [2024-10-12 15:07:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:10,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947704357] [2024-10-12 15:07:10,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947704357] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728722763] [2024-10-12 15:07:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:07:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:10,631 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) [2024-10-12 15:07:10,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 15:07:10,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-12 15:07:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:10,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:07:10,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:10,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 15:07:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728722763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:10,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:10,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:07:10,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383191798] [2024-10-12 15:07:10,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:10,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:10,849 INFO L87 Difference]: Start difference. First operand 68 states and 84 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) [2024-10-12 15:07:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:10,959 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2024-10-12 15:07:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:07:10,960 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 29 [2024-10-12 15:07:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:10,960 INFO L225 Difference]: With dead ends: 101 [2024-10-12 15:07:10,960 INFO L226 Difference]: Without dead ends: 48 [2024-10-12 15:07:10,961 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 [2024-10-12 15:07:10,961 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:10,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-12 15:07:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-10-12 15:07:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-12 15:07:10,969 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2024-10-12 15:07:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:10,969 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-12 15:07:10,970 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) [2024-10-12 15:07:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-12 15:07:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:10,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:10,970 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:11,171 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 [2024-10-12 15:07:11,171 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:11,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2065802316, now seen corresponding path program 7 times [2024-10-12 15:07:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017178947] [2024-10-12 15:07:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017178947] [2024-10-12 15:07:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017178947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089988518] [2024-10-12 15:07:11,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:07:11,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:11,867 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) [2024-10-12 15:07:11,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 15:07:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:11,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 15:07:11,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:11,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:12,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:12,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:12,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:12,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:12,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089988518] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:12,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:12,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 37 [2024-10-12 15:07:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544197189] [2024-10-12 15:07:12,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:12,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-12 15:07:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-12 15:07:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 15:07:12,774 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:13,913 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-10-12 15:07:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-12 15:07:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-12 15:07:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:13,914 INFO L225 Difference]: With dead ends: 119 [2024-10-12 15:07:13,914 INFO L226 Difference]: Without dead ends: 110 [2024-10-12 15:07:13,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=424, Invalid=3358, Unknown=0, NotChecked=0, Total=3782 [2024-10-12 15:07:13,916 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:13,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 85 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:07:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-12 15:07:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2024-10-12 15:07:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2024-10-12 15:07:13,952 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 33 [2024-10-12 15:07:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:13,953 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2024-10-12 15:07:13,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2024-10-12 15:07:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:13,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:13,954 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] [2024-10-12 15:07:13,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:14,154 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 [2024-10-12 15:07:14,155 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:14,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2008544014, now seen corresponding path program 2 times [2024-10-12 15:07:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362620542] [2024-10-12 15:07:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:14,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:14,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362620542] [2024-10-12 15:07:14,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362620542] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827253586] [2024-10-12 15:07:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:14,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:14,446 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) [2024-10-12 15:07:14,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 15:07:14,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:14,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:14,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 15:07:14,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:14,588 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 [2024-10-12 15:07:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:07:14,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:14,698 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 29 treesize of output 25 [2024-10-12 15:07:14,701 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:14,701 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 26 treesize of output 16 [2024-10-12 15:07:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:14,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827253586] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:14,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:14,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 22 [2024-10-12 15:07:14,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019246492] [2024-10-12 15:07:14,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:14,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 15:07:14,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 15:07:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-10-12 15:07:14,732 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2024-10-12 15:07:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:15,004 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2024-10-12 15:07:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:15,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) Word has length 33 [2024-10-12 15:07:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:15,005 INFO L225 Difference]: With dead ends: 133 [2024-10-12 15:07:15,005 INFO L226 Difference]: Without dead ends: 126 [2024-10-12 15:07:15,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-10-12 15:07:15,006 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:15,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 134 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-12 15:07:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2024-10-12 15:07:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2024-10-12 15:07:15,023 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 33 [2024-10-12 15:07:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:15,024 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2024-10-12 15:07:15,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2024-10-12 15:07:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2024-10-12 15:07:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:15,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:15,025 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:15,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 15:07:15,228 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 [2024-10-12 15:07:15,229 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:15,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 698075380, now seen corresponding path program 2 times [2024-10-12 15:07:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409364142] [2024-10-12 15:07:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:15,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409364142] [2024-10-12 15:07:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409364142] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:15,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559087302] [2024-10-12 15:07:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:15,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:15,526 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) [2024-10-12 15:07:15,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 15:07:15,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:15,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 15:07:15,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:15,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:15,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-12 15:07:15,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-12 15:07:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:15,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:15,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-12 15:07:15,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-12 15:07:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559087302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:15,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2024-10-12 15:07:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023092367] [2024-10-12 15:07:15,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:15,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:07:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:07:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:07:15,916 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:16,302 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2024-10-12 15:07:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 15:07:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 33 [2024-10-12 15:07:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:16,304 INFO L225 Difference]: With dead ends: 158 [2024-10-12 15:07:16,304 INFO L226 Difference]: Without dead ends: 109 [2024-10-12 15:07:16,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 15:07:16,305 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:16,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 71 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-12 15:07:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2024-10-12 15:07:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2024-10-12 15:07:16,325 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2024-10-12 15:07:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:16,325 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2024-10-12 15:07:16,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2024-10-12 15:07:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 15:07:16,326 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:16,326 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:16,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 15:07:16,530 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 [2024-10-12 15:07:16,530 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:16,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -437010633, now seen corresponding path program 8 times [2024-10-12 15:07:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322217975] [2024-10-12 15:07:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:16,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:16,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322217975] [2024-10-12 15:07:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322217975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882215749] [2024-10-12 15:07:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:16,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:16,655 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) [2024-10-12 15:07:16,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 15:07:16,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:16,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:16,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:07:16,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:16,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:16,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882215749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:16,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:16,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:07:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993823978] [2024-10-12 15:07:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:16,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:07:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:07:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:07:16,878 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2024-10-12 15:07:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:17,159 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2024-10-12 15:07:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 15:07:17,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-12 15:07:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:17,161 INFO L225 Difference]: With dead ends: 149 [2024-10-12 15:07:17,161 INFO L226 Difference]: Without dead ends: 131 [2024-10-12 15:07:17,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:07:17,162 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:17,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-12 15:07:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2024-10-12 15:07:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2024-10-12 15:07:17,183 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 34 [2024-10-12 15:07:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:17,183 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2024-10-12 15:07:17,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2024-10-12 15:07:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2024-10-12 15:07:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 15:07:17,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:17,184 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:17,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 15:07:17,385 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 [2024-10-12 15:07:17,385 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:17,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1808627333, now seen corresponding path program 9 times [2024-10-12 15:07:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:17,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77457767] [2024-10-12 15:07:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:17,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:17,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77457767] [2024-10-12 15:07:17,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77457767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:17,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48275748] [2024-10-12 15:07:17,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:17,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:17,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:17,529 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) [2024-10-12 15:07:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 15:07:17,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 15:07:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:17,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:07:17,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:17,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48275748] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:17,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:07:17,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527184368] [2024-10-12 15:07:17,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:17,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:07:17,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:07:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:07:17,813 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:17,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:17,972 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2024-10-12 15:07:17,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:07:17,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 36 [2024-10-12 15:07:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:17,973 INFO L225 Difference]: With dead ends: 133 [2024-10-12 15:07:17,973 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 15:07:17,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:17,974 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:17,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 44 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 15:07:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-10-12 15:07:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 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) [2024-10-12 15:07:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-12 15:07:17,982 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 36 [2024-10-12 15:07:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:17,983 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-12 15:07:17,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-12 15:07:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:17,983 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:17,983 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:17,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:18,184 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 [2024-10-12 15:07:18,184 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:18,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 524550494, now seen corresponding path program 10 times [2024-10-12 15:07:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:18,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118855025] [2024-10-12 15:07:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:18,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118855025] [2024-10-12 15:07:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118855025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004471675] [2024-10-12 15:07:19,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:07:19,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:19,421 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) [2024-10-12 15:07:19,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 15:07:19,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:07:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:19,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-12 15:07:19,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:19,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:19,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:20,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:20,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:20,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:20,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:21,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004471675] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:21,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:21,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 55 [2024-10-12 15:07:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691030605] [2024-10-12 15:07:21,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:21,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-12 15:07:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-12 15:07:21,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2726, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 15:07:21,579 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:26,675 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2024-10-12 15:07:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-10-12 15:07:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-12 15:07:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:26,677 INFO L225 Difference]: With dead ends: 210 [2024-10-12 15:07:26,677 INFO L226 Difference]: Without dead ends: 204 [2024-10-12 15:07:26,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4253 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1443, Invalid=14057, Unknown=0, NotChecked=0, Total=15500 [2024-10-12 15:07:26,680 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 194 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:26,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 100 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-12 15:07:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-12 15:07:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-10-12 15:07:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2878787878787878) internal successors, (170), 132 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2024-10-12 15:07:26,706 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 40 [2024-10-12 15:07:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:26,706 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2024-10-12 15:07:26,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2024-10-12 15:07:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:26,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:26,707 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] [2024-10-12 15:07:26,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-12 15:07:26,907 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 [2024-10-12 15:07:26,908 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:26,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash 581808796, now seen corresponding path program 3 times [2024-10-12 15:07:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671514337] [2024-10-12 15:07:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671514337] [2024-10-12 15:07:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671514337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903541115] [2024-10-12 15:07:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:27,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:27,429 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) [2024-10-12 15:07:27,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 15:07:27,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:07:27,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:27,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:27,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:27,551 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 15 [2024-10-12 15:07:27,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:07:27,660 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 24 treesize of output 17 [2024-10-12 15:07:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-12 15:07:27,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-12 15:07:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903541115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:27,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:27,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2024-10-12 15:07:27,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830586550] [2024-10-12 15:07:27,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:27,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-12 15:07:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:27,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-12 15:07:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-10-12 15:07:27,917 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:29,229 INFO L93 Difference]: Finished difference Result 261 states and 341 transitions. [2024-10-12 15:07:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-12 15:07:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-12 15:07:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:29,231 INFO L225 Difference]: With dead ends: 261 [2024-10-12 15:07:29,232 INFO L226 Difference]: Without dead ends: 254 [2024-10-12 15:07:29,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=4665, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 15:07:29,234 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 209 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:29,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 82 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:07:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-10-12 15:07:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 199. [2024-10-12 15:07:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3131313131313131) internal successors, (260), 198 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 260 transitions. [2024-10-12 15:07:29,292 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 260 transitions. Word has length 40 [2024-10-12 15:07:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:29,292 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 260 transitions. [2024-10-12 15:07:29,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 260 transitions. [2024-10-12 15:07:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:29,293 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:29,293 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:29,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:29,493 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 [2024-10-12 15:07:29,494 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:29,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -235839654, now seen corresponding path program 3 times [2024-10-12 15:07:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685667899] [2024-10-12 15:07:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685667899] [2024-10-12 15:07:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685667899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968049880] [2024-10-12 15:07:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:29,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:29,877 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) [2024-10-12 15:07:29,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 15:07:30,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 15:07:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:30,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 15:07:30,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:30,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-12 15:07:30,129 INFO L349 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2024-10-12 15:07:30,129 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 47 treesize of output 19 [2024-10-12 15:07:30,173 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2024-10-12 15:07:30,174 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 36 treesize of output 16 [2024-10-12 15:07:30,211 INFO L349 Elim1Store]: treesize reduction 28, result has 39.1 percent of original size [2024-10-12 15:07:30,212 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 36 treesize of output 22 [2024-10-12 15:07:30,324 INFO L349 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2024-10-12 15:07:30,325 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 50 treesize of output 39 [2024-10-12 15:07:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:30,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:41,841 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 52 treesize of output 48 [2024-10-12 15:07:41,844 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 105 treesize of output 99 [2024-10-12 15:07:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968049880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:41,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 19] total 36 [2024-10-12 15:07:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806456991] [2024-10-12 15:07:41,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:41,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:07:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:07:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=993, Unknown=8, NotChecked=0, Total=1260 [2024-10-12 15:07:41,909 INFO L87 Difference]: Start difference. First operand 199 states and 260 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:44,428 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2024-10-12 15:07:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-12 15:07:44,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-12 15:07:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:44,429 INFO L225 Difference]: With dead ends: 214 [2024-10-12 15:07:44,429 INFO L226 Difference]: Without dead ends: 148 [2024-10-12 15:07:44,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=730, Invalid=2453, Unknown=9, NotChecked=0, Total=3192 [2024-10-12 15:07:44,431 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:44,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:07:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-12 15:07:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2024-10-12 15:07:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 134 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2024-10-12 15:07:44,465 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 40 [2024-10-12 15:07:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:44,465 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2024-10-12 15:07:44,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2024-10-12 15:07:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 15:07:44,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:44,466 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:44,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-12 15:07:44,666 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 [2024-10-12 15:07:44,667 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:44,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -963184485, now seen corresponding path program 11 times [2024-10-12 15:07:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734644109] [2024-10-12 15:07:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:44,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734644109] [2024-10-12 15:07:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734644109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:44,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629111748] [2024-10-12 15:07:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:07:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:44,832 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) [2024-10-12 15:07:44,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-12 15:07:44,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-12 15:07:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:44,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 15:07:44,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:07:45,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:07:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629111748] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:45,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:45,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-12 15:07:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516753444] [2024-10-12 15:07:45,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:45,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 15:07:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 15:07:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:45,165 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:45,329 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2024-10-12 15:07:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-12 15:07:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:45,331 INFO L225 Difference]: With dead ends: 187 [2024-10-12 15:07:45,331 INFO L226 Difference]: Without dead ends: 83 [2024-10-12 15:07:45,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-10-12 15:07:45,333 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:45,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 32 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-12 15:07:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2024-10-12 15:07:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-10-12 15:07:45,346 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 43 [2024-10-12 15:07:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:45,346 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-10-12 15:07:45,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-10-12 15:07:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 15:07:45,347 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:45,347 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:45,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:45,547 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 [2024-10-12 15:07:45,548 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:45,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1142522469, now seen corresponding path program 12 times [2024-10-12 15:07:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:45,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071933291] [2024-10-12 15:07:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071933291] [2024-10-12 15:07:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071933291] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84253975] [2024-10-12 15:07:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:07:45,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:45,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:45,732 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) [2024-10-12 15:07:45,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-12 15:07:45,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-12 15:07:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:45,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 15:07:45,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:46,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:46,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84253975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:46,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:46,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 24 [2024-10-12 15:07:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265082725] [2024-10-12 15:07:46,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:46,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 15:07:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 15:07:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-10-12 15:07:46,284 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2024-10-12 15:07:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:46,471 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2024-10-12 15:07:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 15:07:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) Word has length 44 [2024-10-12 15:07:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:46,472 INFO L225 Difference]: With dead ends: 83 [2024-10-12 15:07:46,472 INFO L226 Difference]: Without dead ends: 79 [2024-10-12 15:07:46,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2024-10-12 15:07:46,473 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 167 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:46,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 19 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-12 15:07:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2024-10-12 15:07:46,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2024-10-12 15:07:46,485 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 44 [2024-10-12 15:07:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:46,485 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2024-10-12 15:07:46,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 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) [2024-10-12 15:07:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2024-10-12 15:07:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-12 15:07:46,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:46,485 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:46,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:46,686 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 [2024-10-12 15:07:46,686 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:46,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 810092084, now seen corresponding path program 13 times [2024-10-12 15:07:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833152318] [2024-10-12 15:07:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:48,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:48,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833152318] [2024-10-12 15:07:48,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833152318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:48,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57406736] [2024-10-12 15:07:48,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:07:48,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:48,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:48,118 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) [2024-10-12 15:07:48,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-12 15:07:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:48,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-12 15:07:48,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:48,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:07:48,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:48,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:48,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:48,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:49,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:49,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57406736] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:50,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 59 [2024-10-12 15:07:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352747464] [2024-10-12 15:07:50,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:50,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-12 15:07:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-12 15:07:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3230, Unknown=0, NotChecked=0, Total=3422 [2024-10-12 15:07:50,102 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:54,109 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2024-10-12 15:07:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-10-12 15:07:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-12 15:07:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:54,111 INFO L225 Difference]: With dead ends: 202 [2024-10-12 15:07:54,111 INFO L226 Difference]: Without dead ends: 191 [2024-10-12 15:07:54,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=839, Invalid=12043, Unknown=0, NotChecked=0, Total=12882 [2024-10-12 15:07:54,114 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 97 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3742 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:54,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 138 Invalid, 3907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3742 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-12 15:07:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-12 15:07:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2024-10-12 15:07:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.25) internal successors, (185), 148 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2024-10-12 15:07:54,156 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 47 [2024-10-12 15:07:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:54,156 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2024-10-12 15:07:54,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2024-10-12 15:07:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-12 15:07:54,157 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:54,157 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:54,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-12 15:07:54,357 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 [2024-10-12 15:07:54,357 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:54,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1552190068, now seen corresponding path program 4 times [2024-10-12 15:07:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:54,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057004184] [2024-10-12 15:07:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-12 15:07:54,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:54,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057004184] [2024-10-12 15:07:54,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057004184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:54,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854910108] [2024-10-12 15:07:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:07:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:54,781 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) [2024-10-12 15:07:54,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-12 15:07:54,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:07:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:54,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:07:54,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:54,913 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 16 treesize of output 12 [2024-10-12 15:07:54,939 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 28 treesize of output 27 [2024-10-12 15:07:55,072 INFO L349 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2024-10-12 15:07:55,072 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 3 case distinctions, treesize of input 40 treesize of output 39 [2024-10-12 15:07:55,205 INFO L349 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2024-10-12 15:07:55,206 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 3 case distinctions, treesize of input 56 treesize of output 51 [2024-10-12 15:07:55,418 INFO L349 Elim1Store]: treesize reduction 54, result has 40.7 percent of original size [2024-10-12 15:07:55,418 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 3 case distinctions, treesize of input 97 treesize of output 83 [2024-10-12 15:07:55,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:07:55,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 70 [2024-10-12 15:07:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-12 15:07:55,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-12 15:07:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854910108] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:56,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:56,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 14] total 40 [2024-10-12 15:07:56,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155764800] [2024-10-12 15:07:56,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:56,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-12 15:07:56,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:56,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-12 15:07:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 15:07:56,364 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:58,040 INFO L93 Difference]: Finished difference Result 246 states and 317 transitions. [2024-10-12 15:07:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-12 15:07:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 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 47 [2024-10-12 15:07:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:58,042 INFO L225 Difference]: With dead ends: 246 [2024-10-12 15:07:58,042 INFO L226 Difference]: Without dead ends: 166 [2024-10-12 15:07:58,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2024-10-12 15:07:58,044 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:58,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 90 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:07:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-12 15:07:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2024-10-12 15:07:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2402597402597402) internal successors, (191), 154 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2024-10-12 15:07:58,099 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 47 [2024-10-12 15:07:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:58,099 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2024-10-12 15:07:58,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2024-10-12 15:07:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 15:07:58,100 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:58,100 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:58,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-12 15:07:58,300 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 [2024-10-12 15:07:58,301 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:58,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1576831095, now seen corresponding path program 14 times [2024-10-12 15:07:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177822192] [2024-10-12 15:07:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177822192] [2024-10-12 15:07:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177822192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249754507] [2024-10-12 15:07:58,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:58,557 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) [2024-10-12 15:07:58,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-12 15:07:58,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:58,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:58,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 15:07:58,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:58,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249754507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:58,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 15:07:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641124138] [2024-10-12 15:07:58,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:58,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 15:07:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 15:07:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-12 15:07:58,877 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:59,297 INFO L93 Difference]: Finished difference Result 227 states and 277 transitions. [2024-10-12 15:07:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-12 15:07:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-12 15:07:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:59,299 INFO L225 Difference]: With dead ends: 227 [2024-10-12 15:07:59,299 INFO L226 Difference]: Without dead ends: 204 [2024-10-12 15:07:59,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2024-10-12 15:07:59,299 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:59,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 35 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:07:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-12 15:07:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 138. [2024-10-12 15:07:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 137 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2024-10-12 15:07:59,331 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 48 [2024-10-12 15:07:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:59,331 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2024-10-12 15:07:59,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2024-10-12 15:07:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 15:07:59,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:59,332 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:59,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-12 15:07:59,533 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 [2024-10-12 15:07:59,533 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:59,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1571077125, now seen corresponding path program 15 times [2024-10-12 15:07:59,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877828924] [2024-10-12 15:07:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-12 15:07:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:59,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877828924] [2024-10-12 15:07:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877828924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:59,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584568176] [2024-10-12 15:07:59,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:59,730 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) [2024-10-12 15:07:59,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-12 15:07:59,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-12 15:07:59,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:59,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:59,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 64 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:08:00,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:08:00,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584568176] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:00,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 27 [2024-10-12 15:08:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942394333] [2024-10-12 15:08:00,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:00,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-12 15:08:00,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-12 15:08:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2024-10-12 15:08:00,288 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:00,575 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2024-10-12 15:08:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 15:08:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-12 15:08:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:00,576 INFO L225 Difference]: With dead ends: 205 [2024-10-12 15:08:00,576 INFO L226 Difference]: Without dead ends: 87 [2024-10-12 15:08:00,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 15:08:00,576 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 177 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:00,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 26 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:08:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-12 15:08:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2024-10-12 15:08:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-10-12 15:08:00,591 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 50 [2024-10-12 15:08:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:00,592 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-10-12 15:08:00,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-10-12 15:08:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 15:08:00,592 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:00,592 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:00,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-12 15:08:00,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-12 15:08:00,793 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:00,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1755186850, now seen corresponding path program 16 times [2024-10-12 15:08:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:00,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135763582] [2024-10-12 15:08:00,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:00,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135763582] [2024-10-12 15:08:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135763582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458459861] [2024-10-12 15:08:01,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:08:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:01,942 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:01,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-12 15:08:02,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:08:02,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:02,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-12 15:08:02,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:02,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:08:02,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:02,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:04,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458459861] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:04,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:04,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 60 [2024-10-12 15:08:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926642486] [2024-10-12 15:08:04,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:04,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-12 15:08:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-12 15:08:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3339, Unknown=0, NotChecked=0, Total=3540 [2024-10-12 15:08:04,011 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:09,179 INFO L93 Difference]: Finished difference Result 243 states and 305 transitions. [2024-10-12 15:08:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-10-12 15:08:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-12 15:08:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:09,181 INFO L225 Difference]: With dead ends: 243 [2024-10-12 15:08:09,181 INFO L226 Difference]: Without dead ends: 232 [2024-10-12 15:08:09,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4700 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1036, Invalid=16786, Unknown=0, NotChecked=0, Total=17822 [2024-10-12 15:08:09,183 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 97 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4745 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 4745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:09,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 141 Invalid, 4944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4745 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-10-12 15:08:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-12 15:08:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 177. [2024-10-12 15:08:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 176 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2024-10-12 15:08:09,232 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 54 [2024-10-12 15:08:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:09,232 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2024-10-12 15:08:09,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 60 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2024-10-12 15:08:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 15:08:09,233 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:09,233 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] [2024-10-12 15:08:09,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-12 15:08:09,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-12 15:08:09,434 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:09,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1075128480, now seen corresponding path program 4 times [2024-10-12 15:08:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:09,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300536466] [2024-10-12 15:08:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:09,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 15:08:10,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300536466] [2024-10-12 15:08:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300536466] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727014818] [2024-10-12 15:08:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:08:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:10,179 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:10,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-12 15:08:10,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:08:10,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:10,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-12 15:08:10,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:10,333 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 13 [2024-10-12 15:08:10,386 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-12 15:08:10,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-10-12 15:08:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-12 15:08:10,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:10,739 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 36 treesize of output 32 [2024-10-12 15:08:10,748 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:08:10,748 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 52 treesize of output 42 [2024-10-12 15:08:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-12 15:08:10,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727014818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:10,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 17] total 36 [2024-10-12 15:08:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971678639] [2024-10-12 15:08:10,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:10,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:08:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:08:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 15:08:10,777 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:11,577 INFO L93 Difference]: Finished difference Result 303 states and 387 transitions. [2024-10-12 15:08:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:08:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-12 15:08:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:11,579 INFO L225 Difference]: With dead ends: 303 [2024-10-12 15:08:11,579 INFO L226 Difference]: Without dead ends: 271 [2024-10-12 15:08:11,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=2193, Unknown=0, NotChecked=0, Total=2550 [2024-10-12 15:08:11,580 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 229 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:11,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 71 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 15:08:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-10-12 15:08:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 241. [2024-10-12 15:08:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.2666666666666666) internal successors, (304), 240 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2024-10-12 15:08:11,649 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 54 [2024-10-12 15:08:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:11,650 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2024-10-12 15:08:11,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2024-10-12 15:08:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 15:08:11,651 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:11,651 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:11,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-12 15:08:11,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-12 15:08:11,855 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:11,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1291389509, now seen corresponding path program 17 times [2024-10-12 15:08:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959511934] [2024-10-12 15:08:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:12,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:12,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959511934] [2024-10-12 15:08:12,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959511934] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:12,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87835126] [2024-10-12 15:08:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:08:12,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:12,120 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:12,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-12 15:08:12,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-12 15:08:12,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:12,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 15:08:12,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:12,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:13,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87835126] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:13,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:13,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-12 15:08:13,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876045955] [2024-10-12 15:08:13,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:13,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:08:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:08:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:08:13,121 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:13,627 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2024-10-12 15:08:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:08:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-12 15:08:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:13,629 INFO L225 Difference]: With dead ends: 338 [2024-10-12 15:08:13,629 INFO L226 Difference]: Without dead ends: 312 [2024-10-12 15:08:13,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 15:08:13,629 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:13,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 29 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:08:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-10-12 15:08:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 209. [2024-10-12 15:08:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.2740384615384615) internal successors, (265), 208 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 265 transitions. [2024-10-12 15:08:13,692 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 265 transitions. Word has length 55 [2024-10-12 15:08:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:13,692 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 265 transitions. [2024-10-12 15:08:13,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 265 transitions. [2024-10-12 15:08:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 15:08:13,693 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:13,693 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:13,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-12 15:08:13,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-12 15:08:13,894 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:13,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash -300547941, now seen corresponding path program 18 times [2024-10-12 15:08:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:13,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770225285] [2024-10-12 15:08:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770225285] [2024-10-12 15:08:14,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770225285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:14,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28420418] [2024-10-12 15:08:14,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:08:14,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:14,079 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:14,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-12 15:08:14,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-12 15:08:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:14,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 15:08:14,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:14,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28420418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:14,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-12 15:08:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315903730] [2024-10-12 15:08:14,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:14,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:08:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:08:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:08:14,637 INFO L87 Difference]: Start difference. First operand 209 states and 265 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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) [2024-10-12 15:08:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:14,965 INFO L93 Difference]: Finished difference Result 313 states and 388 transitions. [2024-10-12 15:08:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 15:08:14,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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 57 [2024-10-12 15:08:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:14,967 INFO L225 Difference]: With dead ends: 313 [2024-10-12 15:08:14,967 INFO L226 Difference]: Without dead ends: 129 [2024-10-12 15:08:14,967 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 [2024-10-12 15:08:14,968 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 208 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:14,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 31 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:08:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-12 15:08:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2024-10-12 15:08:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2024-10-12 15:08:15,005 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 57 [2024-10-12 15:08:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:15,005 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2024-10-12 15:08:15,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 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) [2024-10-12 15:08:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2024-10-12 15:08:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 15:08:15,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:15,006 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:15,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-12 15:08:15,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:15,207 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:15,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1249919156, now seen corresponding path program 19 times [2024-10-12 15:08:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426988037] [2024-10-12 15:08:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:16,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426988037] [2024-10-12 15:08:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426988037] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980828994] [2024-10-12 15:08:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:08:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:16,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:16,446 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:16,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-12 15:08:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:16,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-12 15:08:16,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:16,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:08:16,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:16,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:16,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:17,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:17,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:17,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:17,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:17,866 INFO L311 TraceCheckSpWp]: Computing backward predicates...