./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/xor5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:39:42,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:39:42,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:39:42,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:39:42,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:39:42,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:39:42,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:39:42,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:39:42,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:39:42,960 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:39:42,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:39:42,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:39:42,962 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:39:42,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:39:42,963 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:39:42,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:39:42,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:39:42,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:39:42,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:39:42,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:39:42,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:39:42,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:39:42,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:39:42,968 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:39:42,968 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:39:42,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:39:42,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:39:42,969 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:39:42,969 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:39:42,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:39:42,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:39:42,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:39:42,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:39:42,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:39:42,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:39:42,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:39:42,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:39:42,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:39:42,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:39:42,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:39:42,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:39:42,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:39:42,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-11-16 02:39:43,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:39:43,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:39:43,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:39:43,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:39:43,202 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:39:43,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor5.i [2024-11-16 02:39:44,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:39:44,562 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:39:44,563 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-11-16 02:39:44,570 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad0a18c4/730853db74a044039a5189b877af6c47/FLAG2edf84f3f [2024-11-16 02:39:44,981 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad0a18c4/730853db74a044039a5189b877af6c47 [2024-11-16 02:39:44,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:39:44,984 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:39:44,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:39:44,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:39:44,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:39:44,989 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:39:44" (1/1) ... [2024-11-16 02:39:44,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4472ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:44, skipping insertion in model container [2024-11-16 02:39:44,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:39:44" (1/1) ... [2024-11-16 02:39:45,005 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:39:45,159 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-16 02:39:45,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:39:45,167 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:39:45,183 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2024-11-16 02:39:45,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:39:45,196 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:39:45,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45 WrapperNode [2024-11-16 02:39:45,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:39:45,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:39:45,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:39:45,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:39:45,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,225 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-11-16 02:39:45,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:39:45,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:39:45,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:39:45,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:39:45,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,239 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,256 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-11-16 02:39:45,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,260 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,262 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:39:45,265 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:39:45,265 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:39:45,265 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:39:45,265 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (1/1) ... [2024-11-16 02:39:45,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:39:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:45,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:39:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:39:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:39:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:39:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:39:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:39:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:39:45,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:39:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:39:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-16 02:39:45,335 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-16 02:39:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 02:39:45,401 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:39:45,402 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:39:45,560 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-16 02:39:45,560 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:39:45,579 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:39:45,581 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:39:45,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:39:45 BoogieIcfgContainer [2024-11-16 02:39:45,581 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:39:45,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:39:45,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:39:45,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:39:45,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:39:44" (1/3) ... [2024-11-16 02:39:45,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a611338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:39:45, skipping insertion in model container [2024-11-16 02:39:45,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:39:45" (2/3) ... [2024-11-16 02:39:45,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a611338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:39:45, skipping insertion in model container [2024-11-16 02:39:45,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:39:45" (3/3) ... [2024-11-16 02:39:45,590 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-11-16 02:39:45,605 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:39:45,605 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:39:45,644 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:39:45,649 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;@6152bf7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:39:45,649 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:39:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:39:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-16 02:39:45,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:45,659 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:45,659 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:45,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 820086600, now seen corresponding path program 1 times [2024-11-16 02:39:45,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976234873] [2024-11-16 02:39:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:45,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:45,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-16 02:39:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:45,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-16 02:39:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:45,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-16 02:39:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 02:39:45,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:45,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976234873] [2024-11-16 02:39:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976234873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:39:45,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:39:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:39:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029362573] [2024-11-16 02:39:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:39:45,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:39:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:39:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:39:45,907 INFO L87 Difference]: Start difference. First operand has 34 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:39:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:45,922 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-11-16 02:39:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:39:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-11-16 02:39:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:45,928 INFO L225 Difference]: With dead ends: 63 [2024-11-16 02:39:45,928 INFO L226 Difference]: Without dead ends: 29 [2024-11-16 02:39:45,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:39:45,932 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:45,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:39:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-16 02:39:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-16 02:39:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:39:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-16 02:39:45,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2024-11-16 02:39:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:45,958 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-16 02:39:45,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:39:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-16 02:39:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 02:39:45,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:45,960 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:45,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:39:45,960 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:45,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1604559304, now seen corresponding path program 1 times [2024-11-16 02:39:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493406917] [2024-11-16 02:39:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-16 02:39:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:39:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-16 02:39:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:39:46,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493406917] [2024-11-16 02:39:46,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493406917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:39:46,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:39:46,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 02:39:46,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851430186] [2024-11-16 02:39:46,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:39:46,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 02:39:46,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 02:39:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:39:46,144 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:39:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:46,172 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2024-11-16 02:39:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 02:39:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-16 02:39:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:46,174 INFO L225 Difference]: With dead ends: 55 [2024-11-16 02:39:46,174 INFO L226 Difference]: Without dead ends: 31 [2024-11-16 02:39:46,174 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 02:39:46,175 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:46,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:39:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-16 02:39:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-16 02:39:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:39:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-11-16 02:39:46,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 35 [2024-11-16 02:39:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:46,180 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-11-16 02:39:46,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-16 02:39:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-11-16 02:39:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 02:39:46,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:46,182 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:46,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:39:46,182 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:46,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1428047353, now seen corresponding path program 1 times [2024-11-16 02:39:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412734751] [2024-11-16 02:39:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:39:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 02:39:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-16 02:39:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 02:39:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412734751] [2024-11-16 02:39:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412734751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609333678] [2024-11-16 02:39:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:46,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:39:46,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:39:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 02:39:46,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:39:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:39:46,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:39:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:39:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609333678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:39:46,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:39:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-16 02:39:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56209075] [2024-11-16 02:39:46,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:39:46,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 02:39:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 02:39:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-16 02:39:46,500 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 02:39:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:46,602 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2024-11-16 02:39:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:39:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2024-11-16 02:39:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:46,604 INFO L225 Difference]: With dead ends: 64 [2024-11-16 02:39:46,604 INFO L226 Difference]: Without dead ends: 40 [2024-11-16 02:39:46,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-16 02:39:46,605 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:46,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 105 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:39:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-16 02:39:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-11-16 02:39:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:39:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-16 02:39:46,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 37 [2024-11-16 02:39:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:46,611 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-16 02:39:46,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 02:39:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-16 02:39:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 02:39:46,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:46,613 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:46,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 02:39:46,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:46,816 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:46,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1472428936, now seen corresponding path program 1 times [2024-11-16 02:39:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:46,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230180726] [2024-11-16 02:39:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:39:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 02:39:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-16 02:39:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 02:39:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:46,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230180726] [2024-11-16 02:39:46,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230180726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:46,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753642460] [2024-11-16 02:39:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:46,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:46,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:46,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:39:46,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:39:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:47,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 02:39:47,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:39:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 02:39:47,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 02:39:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753642460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:39:47,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 02:39:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-16 02:39:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811542652] [2024-11-16 02:39:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:39:47,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:39:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:39:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:39:47,125 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:39:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:47,159 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-16 02:39:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:39:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-16 02:39:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:47,160 INFO L225 Difference]: With dead ends: 56 [2024-11-16 02:39:47,160 INFO L226 Difference]: Without dead ends: 37 [2024-11-16 02:39:47,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-16 02:39:47,161 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:47,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:39:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-16 02:39:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-16 02:39:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:39:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-16 02:39:47,166 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 51 [2024-11-16 02:39:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:47,167 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-16 02:39:47,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 02:39:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-16 02:39:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 02:39:47,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:47,169 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:47,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:39:47,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:39:47,370 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:47,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1114921993, now seen corresponding path program 1 times [2024-11-16 02:39:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:47,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286956137] [2024-11-16 02:39:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:47,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:48,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:39:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:48,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 02:39:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:49,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-16 02:39:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:39:49,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:49,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286956137] [2024-11-16 02:39:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286956137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:49,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117088462] [2024-11-16 02:39:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:49,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:39:49,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:39:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:49,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-16 02:39:49,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:39:49,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:39:49,867 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 64 treesize of output 33 [2024-11-16 02:39:50,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:39:50,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-16 02:39:50,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:39:50,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-11-16 02:39:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 02:39:51,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:39:53,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117088462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:53,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:39:53,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 51 [2024-11-16 02:39:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650861428] [2024-11-16 02:39:53,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:39:53,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-16 02:39:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-16 02:39:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=4357, Unknown=0, NotChecked=0, Total=4692 [2024-11-16 02:39:53,116 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 51 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 44 states have internal predecessors, (81), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 02:39:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:55,147 INFO L93 Difference]: Finished difference Result 181 states and 242 transitions. [2024-11-16 02:39:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-16 02:39:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 44 states have internal predecessors, (81), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2024-11-16 02:39:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:55,150 INFO L225 Difference]: With dead ends: 181 [2024-11-16 02:39:55,150 INFO L226 Difference]: Without dead ends: 177 [2024-11-16 02:39:55,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=716, Invalid=8214, Unknown=0, NotChecked=0, Total=8930 [2024-11-16 02:39:55,154 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:55,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 666 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-16 02:39:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-16 02:39:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 103. [2024-11-16 02:39:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 92 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-16 02:39:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2024-11-16 02:39:55,177 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 53 [2024-11-16 02:39:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:55,179 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2024-11-16 02:39:55,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 44 states have internal predecessors, (81), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 02:39:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2024-11-16 02:39:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-16 02:39:55,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:55,182 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:55,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 02:39:55,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:55,382 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:55,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash -537997216, now seen corresponding path program 1 times [2024-11-16 02:39:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:55,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998832414] [2024-11-16 02:39:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:55,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:55,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:39:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:55,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 02:39:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:55,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-16 02:39:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 02:39:55,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:55,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998832414] [2024-11-16 02:39:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998832414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:55,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464894310] [2024-11-16 02:39:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:55,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:39:55,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:39:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:55,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-16 02:39:55,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:39:56,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:39:56,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-16 02:39:56,140 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 19 treesize of output 18 [2024-11-16 02:39:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:39:56,170 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-16 02:39:56,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2024-11-16 02:39:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:39:56,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:39:56,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464894310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:56,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:39:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2024-11-16 02:39:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469781705] [2024-11-16 02:39:56,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:39:56,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 02:39:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:39:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 02:39:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:39:56,404 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-16 02:39:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:39:56,820 INFO L93 Difference]: Finished difference Result 379 states and 506 transitions. [2024-11-16 02:39:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 02:39:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-16 02:39:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:39:56,823 INFO L225 Difference]: With dead ends: 379 [2024-11-16 02:39:56,823 INFO L226 Difference]: Without dead ends: 339 [2024-11-16 02:39:56,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 02:39:56,824 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 151 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:39:56,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 463 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:39:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-16 02:39:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 228. [2024-11-16 02:39:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 203 states have (on average 1.3201970443349753) internal successors, (268), 208 states have internal predecessors, (268), 12 states have call successors, (12), 8 states have call predecessors, (12), 12 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-16 02:39:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 302 transitions. [2024-11-16 02:39:56,855 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 302 transitions. Word has length 54 [2024-11-16 02:39:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:39:56,857 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 302 transitions. [2024-11-16 02:39:56,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-16 02:39:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 302 transitions. [2024-11-16 02:39:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-16 02:39:56,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:39:56,860 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:39:56,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:39:57,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:57,060 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:39:57,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:39:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash 749762708, now seen corresponding path program 2 times [2024-11-16 02:39:57,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:39:57,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967313289] [2024-11-16 02:39:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:39:57,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:39:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:58,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:39:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:58,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 02:39:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:58,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 02:39:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:39:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:39:58,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:39:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967313289] [2024-11-16 02:39:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967313289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:39:58,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253581680] [2024-11-16 02:39:58,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:39:58,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:39:58,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:39:58,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:39:58,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:39:58,990 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:39:58,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:39:58,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-16 02:39:58,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:39:59,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:39:59,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:39:59,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2024-11-16 02:39:59,777 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:39:59,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 60 [2024-11-16 02:39:59,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:40:00,200 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 124 treesize of output 76 [2024-11-16 02:40:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 02:40:00,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:40:00,708 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 45 treesize of output 41 [2024-11-16 02:40:00,712 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 56 treesize of output 48 [2024-11-16 02:40:00,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-11-16 02:40:00,737 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 52 treesize of output 44 [2024-11-16 02:40:01,852 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 15 treesize of output 13 [2024-11-16 02:40:01,854 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 20 treesize of output 18 [2024-11-16 02:40:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 02:40:01,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253581680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:40:01,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:40:01,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 26] total 72 [2024-11-16 02:40:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797817926] [2024-11-16 02:40:01,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:40:01,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-16 02:40:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:40:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-16 02:40:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=4761, Unknown=0, NotChecked=0, Total=5112 [2024-11-16 02:40:01,928 INFO L87 Difference]: Start difference. First operand 228 states and 302 transitions. Second operand has 72 states, 66 states have (on average 1.878787878787879) internal successors, (124), 61 states have internal predecessors, (124), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-16 02:40:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:40:07,758 INFO L93 Difference]: Finished difference Result 678 states and 940 transitions. [2024-11-16 02:40:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-16 02:40:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 66 states have (on average 1.878787878787879) internal successors, (124), 61 states have internal predecessors, (124), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 54 [2024-11-16 02:40:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:40:07,761 INFO L225 Difference]: With dead ends: 678 [2024-11-16 02:40:07,761 INFO L226 Difference]: Without dead ends: 566 [2024-11-16 02:40:07,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5729 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1508, Invalid=19954, Unknown=0, NotChecked=0, Total=21462 [2024-11-16 02:40:07,778 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 512 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 4461 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 4638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:40:07,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1364 Invalid, 4638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4461 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-16 02:40:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-11-16 02:40:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 294. [2024-11-16 02:40:07,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 263 states have (on average 1.3307984790874525) internal successors, (350), 272 states have internal predecessors, (350), 15 states have call successors, (15), 9 states have call predecessors, (15), 15 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) [2024-11-16 02:40:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 393 transitions. [2024-11-16 02:40:07,817 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 393 transitions. Word has length 54 [2024-11-16 02:40:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:40:07,819 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 393 transitions. [2024-11-16 02:40:07,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 66 states have (on average 1.878787878787879) internal successors, (124), 61 states have internal predecessors, (124), 9 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-16 02:40:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 393 transitions. [2024-11-16 02:40:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-16 02:40:07,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:40:07,822 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:40:07,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:40:08,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:40:08,023 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:40:08,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:40:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1206039854, now seen corresponding path program 3 times [2024-11-16 02:40:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:40:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457859159] [2024-11-16 02:40:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:40:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:40:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:40:08,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:40:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:40:08,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-16 02:40:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:40:08,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 02:40:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:40:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 02:40:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:40:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457859159] [2024-11-16 02:40:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457859159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:40:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727393551] [2024-11-16 02:40:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:40:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:40:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:40:08,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:40:08,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:40:08,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 02:40:08,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:40:08,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-16 02:40:08,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:40:08,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2024-11-16 02:40:08,532 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 24 treesize of output 19 [2024-11-16 02:40:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:40:08,578 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-16 02:40:08,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-11-16 02:40:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:40:08,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:40:20,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727393551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:40:20,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 02:40:20,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2024-11-16 02:40:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354063769] [2024-11-16 02:40:20,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 02:40:20,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 02:40:20,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:40:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 02:40:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=592, Unknown=3, NotChecked=0, Total=702 [2024-11-16 02:40:20,809 INFO L87 Difference]: Start difference. First operand 294 states and 393 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-16 02:40:24,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:28,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:32,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:36,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:41,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:45,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:50,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:54,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:40:58,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:41:02,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:41:06,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:41:10,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:41:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:41:10,998 INFO L93 Difference]: Finished difference Result 532 states and 713 transitions. [2024-11-16 02:41:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 02:41:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2024-11-16 02:41:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:41:11,001 INFO L225 Difference]: With dead ends: 532 [2024-11-16 02:41:11,001 INFO L226 Difference]: Without dead ends: 500 [2024-11-16 02:41:11,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=215, Invalid=1188, Unknown=3, NotChecked=0, Total=1406 [2024-11-16 02:41:11,003 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 111 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 12 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:41:11,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 610 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 835 Invalid, 15 Unknown, 0 Unchecked, 50.0s Time] [2024-11-16 02:41:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-11-16 02:41:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 370. [2024-11-16 02:41:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 333 states have (on average 1.3363363363363363) internal successors, (445), 344 states have internal predecessors, (445), 17 states have call successors, (17), 13 states have call predecessors, (17), 19 states have return successors, (27), 12 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-16 02:41:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 489 transitions. [2024-11-16 02:41:11,034 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 489 transitions. Word has length 54 [2024-11-16 02:41:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:41:11,034 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 489 transitions. [2024-11-16 02:41:11,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-16 02:41:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 489 transitions. [2024-11-16 02:41:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-16 02:41:11,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:41:11,036 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:41:11,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:41:11,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:41:11,240 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:41:11,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:41:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -509153428, now seen corresponding path program 1 times [2024-11-16 02:41:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:41:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982828536] [2024-11-16 02:41:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:41:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:41:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:41:11,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-16 02:41:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:41:11,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-16 02:41:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:41:11,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:41:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:41:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-16 02:41:11,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:41:11,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982828536] [2024-11-16 02:41:11,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982828536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:41:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494021292] [2024-11-16 02:41:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:41:11,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:41:11,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:41:11,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:41:11,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:41:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:41:11,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-16 02:41:11,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:41:11,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2024-11-16 02:41:11,737 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 24 treesize of output 19 [2024-11-16 02:41:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:41:11,778 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-16 02:41:11,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-11-16 02:41:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:41:11,878 INFO L311 TraceCheckSpWp]: Computing backward predicates...