./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/s42if.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/s42if.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 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:07:22,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:07:22,665 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:07:22,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:07:22,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:07:22,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:07:22,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:07:22,723 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:07:22,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:07:22,724 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:07:22,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:07:22,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:07:22,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:07:22,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:07:22,728 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:07:22,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:07:22,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:07:22,729 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:07:22,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:07:22,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:07:22,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:07:22,735 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:07:22,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:07:22,735 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:07:22,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:07:22,735 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:07:22,736 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:07:22,736 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:07:22,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:07:22,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:07:22,736 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:07:22,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:07:22,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:07:22,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:07:22,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:07:22,737 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:07:22,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:07:22,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:07:22,738 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:07:22,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:07:22,740 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:07:22,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:07:22,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a [2024-10-12 15:07:23,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:07:23,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:07:23,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:07:23,054 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:07:23,054 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:07:23,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s42if.c [2024-10-12 15:07:24,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:07:24,644 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:07:24,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s42if.c [2024-10-12 15:07:24,651 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d08e943f/f774f5a5cf0e45ce8062ff630156842b/FLAGc753eea06 [2024-10-12 15:07:24,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d08e943f/f774f5a5cf0e45ce8062ff630156842b [2024-10-12 15:07:24,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:07:24,667 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:07:24,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:07:24,669 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:07:24,674 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:07:24,675 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:24,676 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10821670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24, skipping insertion in model container [2024-10-12 15:07:24,676 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:24,698 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:07:24,868 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/s42if.c[588,601] [2024-10-12 15:07:24,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:07:24,898 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:07:24,911 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/s42if.c[588,601] [2024-10-12 15:07:24,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:07:24,936 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:07:24,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24 WrapperNode [2024-10-12 15:07:24,937 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:07:24,938 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:07:24,938 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:07:24,938 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:07:24,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:24,959 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:24,989 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2024-10-12 15:07:24,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:07:24,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:07:24,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:07:24,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:07:25,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,027 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,057 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 15:07:25,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,091 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:07:25,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:07:25,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:07:25,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:07:25,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (1/1) ... [2024-10-12 15:07:25,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:07:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:25,164 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 15:07:25,167 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 15:07:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:07:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:07:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:07:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:07:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 15:07:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 15:07:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:07:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:07:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:07:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 15:07:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:07:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:07:25,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:07:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:07:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:07:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:07:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 15:07:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 15:07:25,313 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:07:25,317 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:07:25,508 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-12 15:07:25,508 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:07:25,536 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:07:25,537 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 15:07:25,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:07:25 BoogieIcfgContainer [2024-10-12 15:07:25,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:07:25,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:07:25,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:07:25,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:07:25,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:07:24" (1/3) ... [2024-10-12 15:07:25,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c2aa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:07:25, skipping insertion in model container [2024-10-12 15:07:25,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:07:24" (2/3) ... [2024-10-12 15:07:25,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c2aa5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:07:25, skipping insertion in model container [2024-10-12 15:07:25,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:07:25" (3/3) ... [2024-10-12 15:07:25,547 INFO L112 eAbstractionObserver]: Analyzing ICFG s42if.c [2024-10-12 15:07:25,563 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:07:25,563 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:07:25,618 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:07:25,625 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;@4911809f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:07:25,625 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:07:25,629 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 15:07:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:07:25,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:25,635 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:25,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:25,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash 845365045, now seen corresponding path program 1 times [2024-10-12 15:07:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316305368] [2024-10-12 15:07:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:25,827 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 15:07:25,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316305368] [2024-10-12 15:07:25,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316305368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:07:25,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:07:25,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:07:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808983202] [2024-10-12 15:07:25,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:07:25,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:07:25,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:07:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:07:25,856 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 15:07:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:25,883 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2024-10-12 15:07:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:07:25,889 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 15:07:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:25,897 INFO L225 Difference]: With dead ends: 37 [2024-10-12 15:07:25,898 INFO L226 Difference]: Without dead ends: 17 [2024-10-12 15:07:25,900 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 15:07:25,904 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 15:07:25,905 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 15:07:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-12 15:07:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-12 15:07:25,930 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 15:07:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-10-12 15:07:25,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2024-10-12 15:07:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:25,933 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-10-12 15:07:25,933 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 15:07:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-10-12 15:07:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:07:25,934 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:25,934 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:25,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:07:25,934 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:25,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 452010334, now seen corresponding path program 1 times [2024-10-12 15:07:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:25,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506206444] [2024-10-12 15:07:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:26,110 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 15:07:26,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506206444] [2024-10-12 15:07:26,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506206444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:07:26,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:07:26,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:07:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101384225] [2024-10-12 15:07:26,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:07:26,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:07:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:07:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:07:26,120 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 15:07:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:26,186 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2024-10-12 15:07:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:07:26,187 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 15:07:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:26,188 INFO L225 Difference]: With dead ends: 36 [2024-10-12 15:07:26,189 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 15:07:26,190 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 15:07:26,193 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 15:07:26,194 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 15:07:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 15:07:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2024-10-12 15:07:26,203 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 15:07:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 15:07:26,203 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-12 15:07:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:26,204 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 15:07:26,204 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 15:07:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 15:07:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:26,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:26,205 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 15:07:26,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:07:26,206 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:26,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash 678183220, now seen corresponding path program 1 times [2024-10-12 15:07:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:26,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816155644] [2024-10-12 15:07:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:26,863 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 15:07:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816155644] [2024-10-12 15:07:26,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816155644] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005846986] [2024-10-12 15:07:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:26,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:26,869 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 15:07:26,870 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 15:07:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:26,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 15:07:26,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:27,050 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 15:07:27,181 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 15:07:27,236 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 15:07:27,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:27,418 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 15:07:27,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005846986] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:27,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:27,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-12 15:07:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97798404] [2024-10-12 15:07:27,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:27,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 15:07:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 15:07:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-12 15:07:27,423 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 15:07:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:27,819 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2024-10-12 15:07:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 15:07:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 19 [2024-10-12 15:07:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:27,821 INFO L225 Difference]: With dead ends: 44 [2024-10-12 15:07:27,821 INFO L226 Difference]: Without dead ends: 40 [2024-10-12 15:07:27,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:07:27,822 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:27,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 27 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:07:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-12 15:07:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-10-12 15:07:27,830 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 15:07:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-12 15:07:27,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-10-12 15:07:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:27,833 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-12 15:07:27,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 15:07:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-12 15:07:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:27,835 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:27,835 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 15:07:27,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:28,035 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 15:07:28,036 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:28,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash 735441522, now seen corresponding path program 1 times [2024-10-12 15:07:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793343604] [2024-10-12 15:07:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:28,278 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 15:07:28,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:28,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793343604] [2024-10-12 15:07:28,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793343604] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:28,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557837759] [2024-10-12 15:07:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:28,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:28,281 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 15:07:28,283 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 15:07:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:28,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:28,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:28,408 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 15:07:28,442 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 15:07:28,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:28,509 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 15:07:28,520 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:28,520 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 15:07:28,532 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 15:07:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557837759] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:28,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:28,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-10-12 15:07:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020580292] [2024-10-12 15:07:28,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:28,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:28,535 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 15:07:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:28,722 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2024-10-12 15:07:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:07:28,723 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 15:07:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:28,724 INFO L225 Difference]: With dead ends: 83 [2024-10-12 15:07:28,724 INFO L226 Difference]: Without dead ends: 71 [2024-10-12 15:07:28,725 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 15:07:28,727 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:28,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 78 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-12 15:07:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2024-10-12 15:07:28,744 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 15:07:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2024-10-12 15:07:28,745 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 19 [2024-10-12 15:07:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:28,745 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2024-10-12 15:07:28,747 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 15:07:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2024-10-12 15:07:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 15:07:28,748 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:28,748 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 15:07:28,766 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 15:07:28,949 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 15:07:28,949 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:28,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1436506100, now seen corresponding path program 1 times [2024-10-12 15:07:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221615371] [2024-10-12 15:07:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:29,121 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 15:07:29,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221615371] [2024-10-12 15:07:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221615371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56317383] [2024-10-12 15:07:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:29,124 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 15:07:29,125 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 15:07:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:29,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 15:07:29,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:29,208 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 15:07:29,237 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 15:07:29,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:29,264 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 15:07:29,267 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 15:07:29,277 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 15:07:29,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56317383] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:29,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:29,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-12 15:07:29,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860314528] [2024-10-12 15:07:29,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:29,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 15:07:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:29,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 15:07:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-12 15:07:29,280 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 15:07:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:29,379 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2024-10-12 15:07:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:07:29,379 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 15:07:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:29,380 INFO L225 Difference]: With dead ends: 75 [2024-10-12 15:07:29,380 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 15:07:29,381 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 15:07:29,381 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:29,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 61 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 15:07:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2024-10-12 15:07:29,392 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 15:07:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2024-10-12 15:07:29,394 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2024-10-12 15:07:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:29,394 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2024-10-12 15:07:29,394 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 15:07:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2024-10-12 15:07:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 15:07:29,395 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:29,395 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 15:07:29,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:29,595 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 15:07:29,596 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:29,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1950697993, now seen corresponding path program 2 times [2024-10-12 15:07:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:29,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027987998] [2024-10-12 15:07:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:29,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:29,671 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 15:07:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027987998] [2024-10-12 15:07:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027987998] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208420492] [2024-10-12 15:07:29,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:29,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:29,674 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 15:07:29,676 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 15:07:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:29,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:07:29,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:29,802 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 15:07:29,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:29,851 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 15:07:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208420492] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:07:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664258288] [2024-10-12 15:07:29,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:29,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:07:29,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:07:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:07:29,854 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 15:07:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:30,044 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2024-10-12 15:07:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:07:30,045 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 15:07:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:30,045 INFO L225 Difference]: With dead ends: 82 [2024-10-12 15:07:30,045 INFO L226 Difference]: Without dead ends: 72 [2024-10-12 15:07:30,046 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 15:07:30,047 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:30,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-12 15:07:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2024-10-12 15:07:30,055 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 15:07:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2024-10-12 15:07:30,056 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2024-10-12 15:07:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:30,056 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2024-10-12 15:07:30,056 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 15:07:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2024-10-12 15:07:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:07:30,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:30,057 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 15:07:30,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:30,257 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 15:07:30,258 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:30,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1769185541, now seen corresponding path program 3 times [2024-10-12 15:07:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387103483] [2024-10-12 15:07:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:30,331 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 15:07:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387103483] [2024-10-12 15:07:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387103483] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95016666] [2024-10-12 15:07:30,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:30,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:30,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:30,334 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 15:07:30,336 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 15:07:30,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:07:30,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:30,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:07:30,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:30,461 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 15:07:30,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:30,505 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 15:07:30,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95016666] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:30,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-12 15:07:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177364844] [2024-10-12 15:07:30,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:30,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:07:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:07:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:07:30,510 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 15:07:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:30,615 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-10-12 15:07:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:07:30,615 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 15:07:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:30,616 INFO L225 Difference]: With dead ends: 74 [2024-10-12 15:07:30,618 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 15:07:30,619 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 15:07:30,619 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:30,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 15:07:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2024-10-12 15:07:30,627 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 15:07:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-12 15:07:30,627 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-10-12 15:07:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:30,628 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-12 15:07:30,628 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 15:07:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-12 15:07:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:30,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:30,628 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 15:07:30,646 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 15:07:30,829 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 15:07:30,830 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:30,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1237862050, now seen corresponding path program 4 times [2024-10-12 15:07:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:30,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607986058] [2024-10-12 15:07:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:31,283 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 15:07:31,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:31,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607986058] [2024-10-12 15:07:31,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607986058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:31,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369979182] [2024-10-12 15:07:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:07:31,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:31,286 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 15:07:31,287 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 15:07:31,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:07:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:31,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-12 15:07:31,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:31,367 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 15:07:31,556 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 15:07:31,653 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 15:07:31,708 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 15:07:31,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:32,188 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 15:07:32,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369979182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:32,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:32,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2024-10-12 15:07:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996047033] [2024-10-12 15:07:32,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:32,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 15:07:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 15:07:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 15:07:32,190 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 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 15:07:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:32,935 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2024-10-12 15:07:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:07:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 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 26 [2024-10-12 15:07:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:32,937 INFO L225 Difference]: With dead ends: 83 [2024-10-12 15:07:32,937 INFO L226 Difference]: Without dead ends: 74 [2024-10-12 15:07:32,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=1842, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 15:07:32,939 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:32,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 67 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:07:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-12 15:07:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2024-10-12 15:07:32,960 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 15:07:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-10-12 15:07:32,961 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 26 [2024-10-12 15:07:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:32,961 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-10-12 15:07:32,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 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 15:07:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-10-12 15:07:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:32,963 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:32,963 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 15:07:32,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:33,167 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 15:07:33,168 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:33,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1180603748, now seen corresponding path program 1 times [2024-10-12 15:07:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:33,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421120264] [2024-10-12 15:07:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:33,498 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 15:07:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421120264] [2024-10-12 15:07:33,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421120264] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:33,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527079819] [2024-10-12 15:07:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:33,500 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 15:07:33,501 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 15:07:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:33,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 15:07:33,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:33,622 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 15:07:33,668 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 15:07:33,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:33,732 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 15:07:33,738 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:33,738 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 15:07:33,763 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 15:07:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527079819] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:33,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:33,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2024-10-12 15:07:33,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940326828] [2024-10-12 15:07:33,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:33,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 15:07:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 15:07:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-12 15:07:33,765 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:33,995 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2024-10-12 15:07:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:07:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-12 15:07:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:33,997 INFO L225 Difference]: With dead ends: 102 [2024-10-12 15:07:33,997 INFO L226 Difference]: Without dead ends: 95 [2024-10-12 15:07:33,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:33,997 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:33,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 98 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-12 15:07:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2024-10-12 15:07:34,013 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 15:07:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-10-12 15:07:34,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 26 [2024-10-12 15:07:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:34,014 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-10-12 15:07:34,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-10-12 15:07:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 15:07:34,015 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:34,015 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 15:07:34,032 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 15:07:34,216 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 15:07:34,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:34,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2103246298, now seen corresponding path program 1 times [2024-10-12 15:07:34,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:34,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122966692] [2024-10-12 15:07:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:34,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:34,517 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 15:07:34,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122966692] [2024-10-12 15:07:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122966692] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592504158] [2024-10-12 15:07:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:34,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:34,519 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 15:07:34,520 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 15:07:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:34,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:34,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:34,618 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 15:07:34,643 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 15:07:34,663 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 15:07:34,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:34,706 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 15:07:34,708 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 15:07:34,727 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 15:07:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592504158] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:34,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-12 15:07:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297586864] [2024-10-12 15:07:34,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:34,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:34,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:34,729 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 15:07:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:34,836 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2024-10-12 15:07:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:07:34,836 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 15:07:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:34,838 INFO L225 Difference]: With dead ends: 109 [2024-10-12 15:07:34,838 INFO L226 Difference]: Without dead ends: 78 [2024-10-12 15:07:34,839 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 15:07:34,840 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:34,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-12 15:07:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2024-10-12 15:07:34,854 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 15:07:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-12 15:07:34,854 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2024-10-12 15:07:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:34,855 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-12 15:07:34,855 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 15:07:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-12 15:07:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 15:07:34,855 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:34,855 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 15:07:34,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:35,059 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 15:07:35,060 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:35,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash -939265221, now seen corresponding path program 5 times [2024-10-12 15:07:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:35,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465098471] [2024-10-12 15:07:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:35,168 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 15:07:35,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:35,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465098471] [2024-10-12 15:07:35,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465098471] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:35,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721370314] [2024-10-12 15:07:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:07:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:35,171 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 15:07:35,172 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 15:07:35,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-12 15:07:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:35,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:07:35,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:35,353 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 15:07:35,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:35,439 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 15:07:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721370314] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:35,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:35,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:07:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858258392] [2024-10-12 15:07:35,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:35,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:35,441 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 15:07:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:35,686 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2024-10-12 15:07:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:35,687 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 15:07:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:35,688 INFO L225 Difference]: With dead ends: 112 [2024-10-12 15:07:35,688 INFO L226 Difference]: Without dead ends: 97 [2024-10-12 15:07:35,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:35,689 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:35,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-12 15:07:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2024-10-12 15:07:35,700 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 15:07:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-10-12 15:07:35,701 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2024-10-12 15:07:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:35,701 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-10-12 15:07:35,701 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 15:07:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-10-12 15:07:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-12 15:07:35,702 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:35,702 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 15:07:35,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 15:07:35,902 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 15:07:35,902 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:35,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash 979910811, now seen corresponding path program 6 times [2024-10-12 15:07:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:35,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174939125] [2024-10-12 15:07:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:36,007 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 15:07:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174939125] [2024-10-12 15:07:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174939125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676275834] [2024-10-12 15:07:36,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:07:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:36,009 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 15:07:36,011 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 15:07:36,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-12 15:07:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:36,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:07:36,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:36,163 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 15:07:36,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:36,217 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 15:07:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676275834] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:36,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:07:36,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902412536] [2024-10-12 15:07:36,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:36,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:07:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:07:36,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:07:36,219 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 15:07:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:36,348 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2024-10-12 15:07:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:07:36,349 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 15:07:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:36,350 INFO L225 Difference]: With dead ends: 101 [2024-10-12 15:07:36,350 INFO L226 Difference]: Without dead ends: 48 [2024-10-12 15:07:36,350 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 15:07:36,351 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:36,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 25 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-12 15:07:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-10-12 15:07:36,361 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 15:07:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-10-12 15:07:36,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2024-10-12 15:07:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:36,362 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-10-12 15:07:36,362 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 15:07:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-10-12 15:07:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:36,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:36,363 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 15:07:36,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 15:07:36,567 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 15:07:36,568 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:36,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2065802316, now seen corresponding path program 7 times [2024-10-12 15:07:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502350063] [2024-10-12 15:07:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:37,099 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 15:07:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502350063] [2024-10-12 15:07:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502350063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884549346] [2024-10-12 15:07:37,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:07:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:37,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:07:37,101 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 15:07:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:37,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-12 15:07:37,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:37,202 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 15:07:37,292 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 15:07:37,382 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 15:07:37,482 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 15:07:37,536 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 15:07:37,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:37,927 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 15:07:37,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884549346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:37,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:37,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2024-10-12 15:07:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769299058] [2024-10-12 15:07:37,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:37,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 15:07:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:37,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 15:07:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 15:07:37,929 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:39,130 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2024-10-12 15:07:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-12 15:07:39,131 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-12 15:07:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:39,131 INFO L225 Difference]: With dead ends: 119 [2024-10-12 15:07:39,131 INFO L226 Difference]: Without dead ends: 110 [2024-10-12 15:07:39,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2024-10-12 15:07:39,134 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:39,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 80 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:07:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-12 15:07:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2024-10-12 15:07:39,157 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 15:07:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2024-10-12 15:07:39,157 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 33 [2024-10-12 15:07:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:39,157 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2024-10-12 15:07:39,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2024-10-12 15:07:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:39,159 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:39,159 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 15:07:39,174 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 15:07:39,362 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 15:07:39,363 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:39,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2008544014, now seen corresponding path program 2 times [2024-10-12 15:07:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:39,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569518765] [2024-10-12 15:07:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:39,681 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 15:07:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569518765] [2024-10-12 15:07:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569518765] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795600240] [2024-10-12 15:07:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:39,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:39,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:39,684 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 15:07:39,685 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 15:07:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:39,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 15:07:39,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:39,859 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 15:07:39,914 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 15:07:39,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:39,981 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 15:07:39,984 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:07:39,984 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 15:07:40,029 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 15:07:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795600240] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:40,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 22 [2024-10-12 15:07:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711337402] [2024-10-12 15:07:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:40,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-12 15:07:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-12 15:07:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-10-12 15:07:40,031 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 15:07:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:40,306 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2024-10-12 15:07:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:40,307 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 15:07:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:40,308 INFO L225 Difference]: With dead ends: 133 [2024-10-12 15:07:40,308 INFO L226 Difference]: Without dead ends: 126 [2024-10-12 15:07:40,308 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 15:07:40,309 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:40,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-12 15:07:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2024-10-12 15:07:40,330 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 15:07:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2024-10-12 15:07:40,330 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 33 [2024-10-12 15:07:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:40,331 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2024-10-12 15:07:40,331 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 15:07:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2024-10-12 15:07:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-12 15:07:40,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:40,332 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 15:07:40,348 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 15:07:40,535 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 15:07:40,536 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:40,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash 698075380, now seen corresponding path program 2 times [2024-10-12 15:07:40,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:40,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685375550] [2024-10-12 15:07:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:40,868 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 15:07:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685375550] [2024-10-12 15:07:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685375550] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027470539] [2024-10-12 15:07:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:40,872 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 15:07:40,873 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 15:07:40,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:40,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 15:07:40,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:41,018 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 15:07:41,063 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 15:07:41,095 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 15:07:41,137 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 15:07:41,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:41,215 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 15:07:41,218 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 15:07:41,253 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 15:07:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027470539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:41,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:41,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2024-10-12 15:07:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304660048] [2024-10-12 15:07:41,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:41,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:07:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:07:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:07:41,255 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 15:07:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:41,640 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2024-10-12 15:07:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 15:07:41,641 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 15:07:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:41,642 INFO L225 Difference]: With dead ends: 158 [2024-10-12 15:07:41,642 INFO L226 Difference]: Without dead ends: 109 [2024-10-12 15:07:41,643 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 15:07:41,644 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:41,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-12 15:07:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2024-10-12 15:07:41,660 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 15:07:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2024-10-12 15:07:41,660 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2024-10-12 15:07:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:41,661 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2024-10-12 15:07:41,661 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 15:07:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2024-10-12 15:07:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-12 15:07:41,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:41,662 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 15:07:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:41,865 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 15:07:41,866 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:41,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash -437010633, now seen corresponding path program 8 times [2024-10-12 15:07:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993183512] [2024-10-12 15:07:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:42,013 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 15:07:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:42,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993183512] [2024-10-12 15:07:42,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993183512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:42,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148655142] [2024-10-12 15:07:42,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:07:42,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:42,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:42,017 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 15:07:42,018 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 15:07:42,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:07:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:42,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:07:42,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:42,201 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 15:07:42,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:42,278 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 15:07:42,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148655142] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:42,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:42,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:07:42,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82544426] [2024-10-12 15:07:42,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:42,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:07:42,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:42,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:07:42,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:07:42,279 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 15:07:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:42,676 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2024-10-12 15:07:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 15:07:42,677 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 15:07:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:42,678 INFO L225 Difference]: With dead ends: 149 [2024-10-12 15:07:42,678 INFO L226 Difference]: Without dead ends: 131 [2024-10-12 15:07:42,679 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 15:07:42,679 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:42,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:07:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-12 15:07:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2024-10-12 15:07:42,698 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 15:07:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2024-10-12 15:07:42,699 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 34 [2024-10-12 15:07:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:42,700 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2024-10-12 15:07:42,700 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 15:07:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2024-10-12 15:07:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-12 15:07:42,701 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:42,701 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 15:07:42,718 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 15:07:42,901 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 15:07:42,902 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:42,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1808627333, now seen corresponding path program 9 times [2024-10-12 15:07:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:42,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011103529] [2024-10-12 15:07:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:43,025 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 15:07:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011103529] [2024-10-12 15:07:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011103529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471630916] [2024-10-12 15:07:43,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:43,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:43,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:43,028 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 15:07:43,029 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 15:07:43,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 15:07:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:43,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:07:43,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:43,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:07:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471630916] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:43,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:07:43,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085715476] [2024-10-12 15:07:43,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:43,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:07:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:07:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:07:43,323 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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 15:07:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:43,466 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2024-10-12 15:07:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:07:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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 36 [2024-10-12 15:07:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:43,467 INFO L225 Difference]: With dead ends: 133 [2024-10-12 15:07:43,467 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 15:07:43,467 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 15:07:43,468 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:43,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 15:07:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-10-12 15:07:43,476 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 15:07:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-12 15:07:43,476 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 36 [2024-10-12 15:07:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:43,476 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-12 15:07:43,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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 15:07:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-12 15:07:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:43,477 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:43,477 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 15:07:43,494 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 15:07:43,681 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 15:07:43,682 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:43,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 524550494, now seen corresponding path program 10 times [2024-10-12 15:07:43,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:43,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513816138] [2024-10-12 15:07:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:43,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:44,304 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 15:07:44,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513816138] [2024-10-12 15:07:44,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513816138] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066199575] [2024-10-12 15:07:44,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:07:44,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:44,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:44,307 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 15:07:44,309 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 15:07:44,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:07:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:44,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-12 15:07:44,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:44,428 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 15:07:44,785 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 15:07:44,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:07:44,969 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 15:07:45,110 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 15:07:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:45,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:07:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066199575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:46,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:46,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2024-10-12 15:07:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021315623] [2024-10-12 15:07:46,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:46,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-12 15:07:46,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-12 15:07:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2920, Unknown=0, NotChecked=0, Total=3192 [2024-10-12 15:07:46,152 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 15:07:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:49,224 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2024-10-12 15:07:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-10-12 15:07:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 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 15:07:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:49,225 INFO L225 Difference]: With dead ends: 176 [2024-10-12 15:07:49,225 INFO L226 Difference]: Without dead ends: 166 [2024-10-12 15:07:49,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1038, Invalid=10304, Unknown=0, NotChecked=0, Total=11342 [2024-10-12 15:07:49,228 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:49,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 123 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-12 15:07:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-12 15:07:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2024-10-12 15:07:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2644628099173554) internal successors, (153), 121 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 15:07:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2024-10-12 15:07:49,252 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 40 [2024-10-12 15:07:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:49,252 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2024-10-12 15:07:49,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 57 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 15:07:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2024-10-12 15:07:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:49,253 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:49,253 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 15:07:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:49,456 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 15:07:49,457 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:49,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 581808796, now seen corresponding path program 3 times [2024-10-12 15:07:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65838625] [2024-10-12 15:07:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:49,961 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 15:07:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:49,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65838625] [2024-10-12 15:07:49,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65838625] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:49,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459210407] [2024-10-12 15:07:49,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:49,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:49,963 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 15:07:49,964 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 15:07:50,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:07:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:50,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:07:50,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:50,072 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 15:07:50,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:07:50,170 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 15:07:50,278 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 15:07:50,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:50,502 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 15:07:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459210407] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:50,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2024-10-12 15:07:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434854757] [2024-10-12 15:07:50,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:50,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-12 15:07:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-12 15:07:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2024-10-12 15:07:50,505 INFO L87 Difference]: Start difference. First operand 122 states and 153 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 15:07:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:51,862 INFO L93 Difference]: Finished difference Result 243 states and 314 transitions. [2024-10-12 15:07:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-12 15:07:51,865 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 15:07:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:51,866 INFO L225 Difference]: With dead ends: 243 [2024-10-12 15:07:51,866 INFO L226 Difference]: Without dead ends: 236 [2024-10-12 15:07:51,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=4665, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 15:07:51,868 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:51,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 89 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:07:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-12 15:07:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 181. [2024-10-12 15:07:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2944444444444445) internal successors, (233), 180 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 15:07:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 233 transitions. [2024-10-12 15:07:51,902 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 233 transitions. Word has length 40 [2024-10-12 15:07:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:51,902 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 233 transitions. [2024-10-12 15:07:51,902 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 15:07:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 233 transitions. [2024-10-12 15:07:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 15:07:51,903 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:51,903 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 15:07:51,917 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 15:07:52,103 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 15:07:52,104 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:52,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -235839654, now seen corresponding path program 3 times [2024-10-12 15:07:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:52,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590340213] [2024-10-12 15:07:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:52,513 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 15:07:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590340213] [2024-10-12 15:07:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590340213] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741745484] [2024-10-12 15:07:52,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:07:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:52,516 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 15:07:52,518 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 15:07:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 15:07:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:52,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 15:07:52,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:52,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-12 15:07:52,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-12 15:07:52,775 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 29 treesize of output 13 [2024-10-12 15:07:52,812 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2024-10-12 15:07:52,812 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 17 [2024-10-12 15:07:52,883 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-12 15:07:52,884 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 29 treesize of output 18 [2024-10-12 15:07:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:52,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:53,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-12 15:07:53,232 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 18 treesize of output 12 [2024-10-12 15:07:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-12 15:07:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741745484] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:53,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:53,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 36 [2024-10-12 15:07:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042046282] [2024-10-12 15:07:53,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:53,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:07:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:07:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 15:07:53,313 INFO L87 Difference]: Start difference. First operand 181 states and 233 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:07:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:54,113 INFO L93 Difference]: Finished difference Result 194 states and 248 transitions. [2024-10-12 15:07:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 15:07:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 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 15:07:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:54,114 INFO L225 Difference]: With dead ends: 194 [2024-10-12 15:07:54,114 INFO L226 Difference]: Without dead ends: 75 [2024-10-12 15:07:54,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=578, Invalid=2962, Unknown=0, NotChecked=0, Total=3540 [2024-10-12 15:07:54,116 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:54,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 66 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:07:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-12 15:07:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2024-10-12 15:07:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 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 15:07:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-10-12 15:07:54,127 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 40 [2024-10-12 15:07:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:54,128 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-10-12 15:07:54,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:07:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-10-12 15:07:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-12 15:07:54,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:54,128 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:07:54,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-12 15:07:54,329 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 15:07:54,329 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:54,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1994181509, now seen corresponding path program 11 times [2024-10-12 15:07:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:54,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596287231] [2024-10-12 15:07:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596287231] [2024-10-12 15:07:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596287231] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376888606] [2024-10-12 15:07:54,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:07:54,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:54,479 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 15:07:54,483 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 15:07:54,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-12 15:07:54,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:54,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 15:07:54,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:54,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376888606] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:54,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-12 15:07:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694245359] [2024-10-12 15:07:54,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:54,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 15:07:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 15:07:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:54,927 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:55,267 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2024-10-12 15:07:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 15:07:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-12 15:07:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:55,268 INFO L225 Difference]: With dead ends: 121 [2024-10-12 15:07:55,268 INFO L226 Difference]: Without dead ends: 100 [2024-10-12 15:07:55,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-10-12 15:07:55,269 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:55,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:07:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-12 15:07:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2024-10-12 15:07:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-10-12 15:07:55,289 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 41 [2024-10-12 15:07:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:55,289 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-10-12 15:07:55,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-10-12 15:07:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-12 15:07:55,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:55,290 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 15:07:55,304 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 15:07:55,490 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 15:07:55,491 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:55,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -963184485, now seen corresponding path program 12 times [2024-10-12 15:07:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:55,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723926337] [2024-10-12 15:07:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:55,680 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 15:07:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:55,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723926337] [2024-10-12 15:07:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723926337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344409478] [2024-10-12 15:07:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:07:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:55,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:55,683 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 15:07:55,684 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 15:07:55,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-12 15:07:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:07:55,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-12 15:07:55,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:55,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-12 15:07:56,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344409478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:56,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:56,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-12 15:07:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696310942] [2024-10-12 15:07:56,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:56,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 15:07:56,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 15:07:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:07:56,027 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:56,158 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2024-10-12 15:07:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:07:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-12 15:07:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:56,159 INFO L225 Difference]: With dead ends: 107 [2024-10-12 15:07:56,160 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 15:07:56,160 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 15:07:56,160 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:56,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 32 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:07:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 15:07:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-10-12 15:07:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 15:07:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2024-10-12 15:07:56,171 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 43 [2024-10-12 15:07:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:56,171 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2024-10-12 15:07:56,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2024-10-12 15:07:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-12 15:07:56,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:56,171 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 15:07:56,184 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 15:07:56,372 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 15:07:56,372 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:07:56,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:07:56,372 INFO L85 PathProgramCache]: Analyzing trace with hash 810092084, now seen corresponding path program 13 times [2024-10-12 15:07:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:07:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568250341] [2024-10-12 15:07:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:07:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:07:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:57,213 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 15:07:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:07:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568250341] [2024-10-12 15:07:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568250341] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:07:57,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437442287] [2024-10-12 15:07:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:07:57,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:07:57,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:07:57,218 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 15:07:57,221 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 15:07:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:07:57,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-12 15:07:57,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:07:57,341 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 15:07:57,455 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 15:07:57,537 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 15:07:57,629 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 15:07:57,761 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 15:07:57,891 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 15:07:57,945 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 15:07:57,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:07:58,695 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 15:07:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437442287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:07:58,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:07:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 51 [2024-10-12 15:07:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262193995] [2024-10-12 15:07:58,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:07:58,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-12 15:07:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:07:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-12 15:07:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2024-10-12 15:07:58,698 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:07:59,824 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2024-10-12 15:07:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-12 15:07:59,824 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-12 15:07:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:07:59,825 INFO L225 Difference]: With dead ends: 94 [2024-10-12 15:07:59,825 INFO L226 Difference]: Without dead ends: 90 [2024-10-12 15:07:59,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=328, Invalid=4228, Unknown=0, NotChecked=0, Total=4556 [2024-10-12 15:07:59,826 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 15:07:59,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 124 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 15:07:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-12 15:07:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2024-10-12 15:07:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0875) internal successors, (87), 80 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 15:07:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2024-10-12 15:07:59,844 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 47 [2024-10-12 15:07:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:07:59,844 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2024-10-12 15:07:59,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:07:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2024-10-12 15:07:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-12 15:07:59,845 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:07:59,845 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 15:07:59,857 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 15:08:00,045 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 15:08:00,045 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:00,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:00,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1576831095, now seen corresponding path program 14 times [2024-10-12 15:08:00,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:00,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827915791] [2024-10-12 15:08:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:00,245 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 15:08:00,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827915791] [2024-10-12 15:08:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827915791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938623577] [2024-10-12 15:08:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:08:00,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:00,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:00,247 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 15:08:00,249 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 15:08:00,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:08:00,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:00,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 15:08:00,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:00,502 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 15:08:00,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:00,593 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 15:08:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938623577] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:00,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:00,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-12 15:08:00,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062207109] [2024-10-12 15:08:00,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:00,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 15:08:00,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 15:08:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-12 15:08:00,595 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:00,958 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2024-10-12 15:08:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-12 15:08:00,958 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 15:08:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:00,959 INFO L225 Difference]: With dead ends: 137 [2024-10-12 15:08:00,959 INFO L226 Difference]: Without dead ends: 116 [2024-10-12 15:08:00,959 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 15:08:00,960 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:00,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 37 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:08:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-12 15:08:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2024-10-12 15:08:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 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 15:08:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2024-10-12 15:08:00,977 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 48 [2024-10-12 15:08:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:00,977 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2024-10-12 15:08:00,977 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 15:08:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2024-10-12 15:08:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-12 15:08:00,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:00,978 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 15:08:00,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-12 15:08:01,178 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 15:08:01,179 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:01,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1571077125, now seen corresponding path program 15 times [2024-10-12 15:08:01,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:01,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241754181] [2024-10-12 15:08:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:01,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:01,399 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 15:08:01,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:01,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241754181] [2024-10-12 15:08:01,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241754181] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133233991] [2024-10-12 15:08:01,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:08:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:01,402 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 15:08:01,403 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 15:08:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-12 15:08:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:01,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 15:08:01,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:01,797 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 15:08:01,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-12 15:08:01,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133233991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:01,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18] total 28 [2024-10-12 15:08:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905352622] [2024-10-12 15:08:01,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:01,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-12 15:08:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-12 15:08:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2024-10-12 15:08:01,959 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:02,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:02,192 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2024-10-12 15:08:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 15:08:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-12 15:08:02,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:02,193 INFO L225 Difference]: With dead ends: 123 [2024-10-12 15:08:02,193 INFO L226 Difference]: Without dead ends: 62 [2024-10-12 15:08:02,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 15:08:02,194 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:02,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 31 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:08:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-12 15:08:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-10-12 15:08:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 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 15:08:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-10-12 15:08:02,206 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 50 [2024-10-12 15:08:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:02,206 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-10-12 15:08:02,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-10-12 15:08:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 15:08:02,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:02,207 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 15:08:02,220 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 15:08:02,407 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 15:08:02,408 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:02,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1755186850, now seen corresponding path program 16 times [2024-10-12 15:08:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:02,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023951267] [2024-10-12 15:08:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:03,565 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 15:08:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023951267] [2024-10-12 15:08:03,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023951267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:03,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596286189] [2024-10-12 15:08:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:08:03,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:03,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:03,568 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 15:08:03,569 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 15:08:03,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:08:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:03,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-12 15:08:03,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:03,725 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 15:08:03,844 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 15:08:03,920 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 15:08:04,013 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 15:08:04,127 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 15:08:04,259 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 15:08:04,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:04,536 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 15:08:04,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:05,573 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 15:08:05,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596286189] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:05,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:05,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 60 [2024-10-12 15:08:05,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267026009] [2024-10-12 15:08:05,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:05,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-12 15:08:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-12 15:08:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3339, Unknown=0, NotChecked=0, Total=3540 [2024-10-12 15:08:05,575 INFO L87 Difference]: Start difference. First operand 55 states and 59 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 15:08:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:07,158 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-10-12 15:08:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-12 15:08:07,159 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 15:08:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:07,159 INFO L225 Difference]: With dead ends: 107 [2024-10-12 15:08:07,160 INFO L226 Difference]: Without dead ends: 103 [2024-10-12 15:08:07,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=392, Invalid=5928, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 15:08:07,161 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:07,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 147 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-12 15:08:07,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-12 15:08:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2024-10-12 15:08:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 15:08:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-10-12 15:08:07,181 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 54 [2024-10-12 15:08:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:07,181 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-10-12 15:08:07,182 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 15:08:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-10-12 15:08:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 15:08:07,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:07,182 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 15:08:07,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-12 15:08:07,383 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 15:08:07,383 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:07,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1075128480, now seen corresponding path program 4 times [2024-10-12 15:08:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:07,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863743116] [2024-10-12 15:08:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:07,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:08,071 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 15:08:08,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:08,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863743116] [2024-10-12 15:08:08,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863743116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:08,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597167639] [2024-10-12 15:08:08,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:08:08,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:08,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:08,073 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 15:08:08,074 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 15:08:08,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:08:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:08,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-12 15:08:08,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:08,229 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 15:08:08,279 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-12 15:08:08,279 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 15:08:08,375 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 15:08:08,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:08,601 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 15:08:08,607 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-12 15:08:08,607 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 15:08:08,645 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 15:08:08,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597167639] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:08,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:08,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 17] total 36 [2024-10-12 15:08:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966939815] [2024-10-12 15:08:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:08,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:08:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:08:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 15:08:08,647 INFO L87 Difference]: Start difference. First operand 91 states and 98 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 15:08:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:09,373 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2024-10-12 15:08:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 15:08:09,374 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 15:08:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:09,374 INFO L225 Difference]: With dead ends: 104 [2024-10-12 15:08:09,374 INFO L226 Difference]: Without dead ends: 95 [2024-10-12 15:08:09,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=448, Invalid=2858, Unknown=0, NotChecked=0, Total=3306 [2024-10-12 15:08:09,375 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:09,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:08:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-12 15:08:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-10-12 15:08:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 15:08:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2024-10-12 15:08:09,400 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 54 [2024-10-12 15:08:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:09,401 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2024-10-12 15:08:09,401 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 15:08:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2024-10-12 15:08:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-12 15:08:09,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:09,401 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 15:08:09,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-12 15:08:09,602 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 15:08:09,602 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:09,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1291389509, now seen corresponding path program 17 times [2024-10-12 15:08:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:09,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922067265] [2024-10-12 15:08:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:09,852 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 15:08:09,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922067265] [2024-10-12 15:08:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922067265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302471198] [2024-10-12 15:08:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:08:09,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:09,855 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 15:08:09,856 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 15:08:10,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-12 15:08:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:10,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 15:08:10,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:11,024 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 15:08:11,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:11,158 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 15:08:11,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302471198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:11,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:11,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-12 15:08:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756660059] [2024-10-12 15:08:11,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:11,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:08:11,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:08:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:08:11,160 INFO L87 Difference]: Start difference. First operand 94 states and 100 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 15:08:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:11,580 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2024-10-12 15:08:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 15:08:11,580 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 15:08:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:11,581 INFO L225 Difference]: With dead ends: 156 [2024-10-12 15:08:11,581 INFO L226 Difference]: Without dead ends: 132 [2024-10-12 15:08:11,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 15:08:11,582 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:11,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 41 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:08:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-12 15:08:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 63. [2024-10-12 15:08:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 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 15:08:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-10-12 15:08:11,604 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 55 [2024-10-12 15:08:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:11,604 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-10-12 15:08:11,604 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 15:08:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-10-12 15:08:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 15:08:11,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:11,605 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 15:08:11,623 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 15:08:11,805 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 15:08:11,805 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:11,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash -300547941, now seen corresponding path program 18 times [2024-10-12 15:08:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:11,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176472050] [2024-10-12 15:08:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:12,030 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 15:08:12,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176472050] [2024-10-12 15:08:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176472050] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:12,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424045322] [2024-10-12 15:08:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:08:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:12,032 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 15:08:12,034 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 15:08:12,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-12 15:08:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:12,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 15:08:12,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:12,576 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 15:08:12,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:12,694 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 15:08:12,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424045322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:12,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:12,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-10-12 15:08:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715359299] [2024-10-12 15:08:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:12,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:08:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:08:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:08:12,696 INFO L87 Difference]: Start difference. First operand 63 states and 68 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 15:08:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:12,919 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2024-10-12 15:08:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 15:08:12,920 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 15:08:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:12,920 INFO L225 Difference]: With dead ends: 139 [2024-10-12 15:08:12,920 INFO L226 Difference]: Without dead ends: 69 [2024-10-12 15:08:12,921 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 15:08:12,921 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:12,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 34 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:08:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-12 15:08:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-10-12 15:08:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-10-12 15:08:12,937 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2024-10-12 15:08:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:12,937 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-10-12 15:08:12,937 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 15:08:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-10-12 15:08:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 15:08:12,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:12,938 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 15:08:12,956 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 15:08:13,138 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 15:08:13,139 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:13,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1249919156, now seen corresponding path program 19 times [2024-10-12 15:08:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606367631] [2024-10-12 15:08:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:14,386 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 15:08:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606367631] [2024-10-12 15:08:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606367631] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655228279] [2024-10-12 15:08:14,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:08:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:14,389 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 15:08:14,390 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 15:08:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:14,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-12 15:08:14,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:14,539 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 15:08:14,655 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 15:08:14,741 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 15:08:14,855 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 15:08:14,972 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 15:08:15,111 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 15:08:15,271 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 15:08:15,454 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 15:08:15,523 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 15:08:15,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:17,045 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 15:08:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655228279] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:17,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:17,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 69 [2024-10-12 15:08:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581287742] [2024-10-12 15:08:17,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:17,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-12 15:08:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-12 15:08:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4459, Unknown=0, NotChecked=0, Total=4692 [2024-10-12 15:08:17,048 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:19,271 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2024-10-12 15:08:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-12 15:08:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-10-12 15:08:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:19,272 INFO L225 Difference]: With dead ends: 120 [2024-10-12 15:08:19,272 INFO L226 Difference]: Without dead ends: 116 [2024-10-12 15:08:19,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=455, Invalid=7917, Unknown=0, NotChecked=0, Total=8372 [2024-10-12 15:08:19,274 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:19,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-12 15:08:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-12 15:08:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2024-10-12 15:08:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 103 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2024-10-12 15:08:19,300 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 61 [2024-10-12 15:08:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:19,301 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2024-10-12 15:08:19,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 69 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2024-10-12 15:08:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 15:08:19,301 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:19,301 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:19,314 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 15:08:19,502 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 15:08:19,502 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:19,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1929977526, now seen corresponding path program 5 times [2024-10-12 15:08:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237847541] [2024-10-12 15:08:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 138 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 15:08:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237847541] [2024-10-12 15:08:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237847541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178882230] [2024-10-12 15:08:21,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:08:21,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:21,101 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 15:08:21,102 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 15:08:23,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-12 15:08:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:23,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-12 15:08:23,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:24,181 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 15:08:24,298 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-12 15:08:24,298 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 36 treesize of output 27 [2024-10-12 15:08:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 15:08:26,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:27,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2024-10-12 15:08:27,282 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-12 15:08:27,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 29 [2024-10-12 15:08:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 31 proven. 107 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-12 15:08:27,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178882230] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:27,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:27,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20, 20] total 66 [2024-10-12 15:08:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154617265] [2024-10-12 15:08:27,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:27,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-12 15:08:27,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-12 15:08:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=4008, Unknown=0, NotChecked=0, Total=4290 [2024-10-12 15:08:27,308 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:30,103 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2024-10-12 15:08:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-12 15:08:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-10-12 15:08:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:30,104 INFO L225 Difference]: With dead ends: 119 [2024-10-12 15:08:30,105 INFO L226 Difference]: Without dead ends: 110 [2024-10-12 15:08:30,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=870, Invalid=10259, Unknown=1, NotChecked=0, Total=11130 [2024-10-12 15:08:30,106 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:30,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 197 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 15:08:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-12 15:08:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2024-10-12 15:08:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 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 15:08:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2024-10-12 15:08:30,136 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 61 [2024-10-12 15:08:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:30,136 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2024-10-12 15:08:30,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:08:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2024-10-12 15:08:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-12 15:08:30,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:30,137 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:30,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-12 15:08:30,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:30,338 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:30,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash -212528713, now seen corresponding path program 20 times [2024-10-12 15:08:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584704441] [2024-10-12 15:08:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584704441] [2024-10-12 15:08:30,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584704441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822302913] [2024-10-12 15:08:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:08:30,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:30,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:30,635 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:30,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-12 15:08:30,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:08:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:30,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 15:08:30,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:30,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:31,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822302913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:31,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:31,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-10-12 15:08:31,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529416109] [2024-10-12 15:08:31,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:31,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 15:08:31,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 15:08:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-10-12 15:08:31,123 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:08:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:31,629 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2024-10-12 15:08:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-12 15:08:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 62 [2024-10-12 15:08:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:31,630 INFO L225 Difference]: With dead ends: 175 [2024-10-12 15:08:31,630 INFO L226 Difference]: Without dead ends: 148 [2024-10-12 15:08:31,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2024-10-12 15:08:31,631 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:31,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 30 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:08:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-12 15:08:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 70. [2024-10-12 15:08:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:08:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2024-10-12 15:08:31,650 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 62 [2024-10-12 15:08:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:31,651 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2024-10-12 15:08:31,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:08:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2024-10-12 15:08:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-12 15:08:31,652 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:31,652 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:31,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-12 15:08:31,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-12 15:08:31,852 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:31,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 514158981, now seen corresponding path program 21 times [2024-10-12 15:08:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2168404] [2024-10-12 15:08:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-10-12 15:08:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:32,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2168404] [2024-10-12 15:08:32,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2168404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:32,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478894019] [2024-10-12 15:08:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:08:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:32,128 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-12 15:08:32,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-12 15:08:32,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:32,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 15:08:32,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:32,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 63 proven. 76 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 15:08:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478894019] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:33,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 23] total 36 [2024-10-12 15:08:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573049603] [2024-10-12 15:08:33,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:33,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-12 15:08:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-12 15:08:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2024-10-12 15:08:33,171 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 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 15:08:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:08:33,609 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2024-10-12 15:08:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-12 15:08:33,609 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 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) Word has length 64 [2024-10-12 15:08:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:08:33,610 INFO L225 Difference]: With dead ends: 155 [2024-10-12 15:08:33,610 INFO L226 Difference]: Without dead ends: 76 [2024-10-12 15:08:33,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 95 SyntacticMatches, 16 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=710, Invalid=2596, Unknown=0, NotChecked=0, Total=3306 [2024-10-12 15:08:33,611 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 234 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:08:33,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 31 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:08:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-12 15:08:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-10-12 15:08:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:08:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-10-12 15:08:33,631 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 64 [2024-10-12 15:08:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:08:33,632 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-10-12 15:08:33,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 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 15:08:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-10-12 15:08:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-12 15:08:33,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:08:33,632 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:08:33,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-12 15:08:33,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:33,833 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:08:33,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:08:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1155375454, now seen corresponding path program 22 times [2024-10-12 15:08:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:08:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896727146] [2024-10-12 15:08:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:08:33,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:08:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:08:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 15:08:35,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:08:35,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896727146] [2024-10-12 15:08:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896727146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:08:35,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626366368] [2024-10-12 15:08:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:08:35,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:08:35,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:08:35,531 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:08:35,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-12 15:08:35,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:08:35,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:08:35,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-12 15:08:35,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:08:35,872 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 15:08:36,545 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 15:08:36,686 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 15:08:36,821 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 15:08:36,966 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 15:08:37,140 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 15:08:37,337 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 15:08:37,549 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 15:08:37,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 15:08:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 15:08:37,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:08:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-10-12 15:08:40,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626366368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:08:40,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:08:40,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 29] total 89 [2024-10-12 15:08:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043961212] [2024-10-12 15:08:40,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:08:40,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-10-12 15:08:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:08:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-10-12 15:08:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=7477, Unknown=0, NotChecked=0, Total=7832 [2024-10-12 15:08:40,176 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)