./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-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-wip.dd.update-z3-fca748b-m [2024-11-19 16:52:59,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 16:52:59,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 16:52:59,785 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 16:52:59,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 16:52:59,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 16:52:59,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 16:52:59,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 16:52:59,831 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 16:52:59,832 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 16:52:59,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 16:52:59,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 16:52:59,833 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 16:52:59,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 16:52:59,834 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 16:52:59,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 16:52:59,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 16:52:59,835 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 16:52:59,835 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 16:52:59,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 16:52:59,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 16:52:59,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 16:52:59,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 16:52:59,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 16:52:59,838 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 16:52:59,838 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 16:52:59,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 16:52:59,839 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 16:52:59,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 16:52:59,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 16:52:59,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 16:52:59,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 16:52:59,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:52:59,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 16:52:59,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 16:52:59,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 16:52:59,841 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 16:52:59,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 16:52:59,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 16:52:59,842 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 16:52:59,842 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 16:52:59,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 16:52:59,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-11-19 16:53:00,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 16:53:00,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 16:53:00,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 16:53:00,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 16:53:00,182 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 16:53:00,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-11-19 16:53:01,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 16:53:01,834 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 16:53:01,835 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-11-19 16:53:01,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0ca64b9/97ccf2d2d91f4c75bf11ab635cd7cc7c/FLAGe0a52f624 [2024-11-19 16:53:01,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0ca64b9/97ccf2d2d91f4c75bf11ab635cd7cc7c [2024-11-19 16:53:01,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 16:53:01,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 16:53:01,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 16:53:01,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 16:53:01,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 16:53:01,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:01" (1/1) ... [2024-11-19 16:53:01,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ace7cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:01, skipping insertion in model container [2024-11-19 16:53:01,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:01" (1/1) ... [2024-11-19 16:53:01,894 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 16:53:02,104 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] [2024-11-19 16:53:02,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:53:02,119 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 16:53:02,146 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] [2024-11-19 16:53:02,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:53:02,171 INFO L204 MainTranslator]: Completed translation [2024-11-19 16:53:02,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02 WrapperNode [2024-11-19 16:53:02,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 16:53:02,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 16:53:02,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 16:53:02,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 16:53:02,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,211 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-11-19 16:53:02,211 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 16:53:02,212 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 16:53:02,212 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 16:53:02,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 16:53:02,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,252 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 11, 7]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7]. The 5 writes are split as follows [0, 5, 0]. [2024-11-19 16:53:02,252 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,252 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,263 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,267 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 16:53:02,272 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 16:53:02,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 16:53:02,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 16:53:02,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (1/1) ... [2024-11-19 16:53:02,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:53:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:02,315 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) [2024-11-19 16:53:02,318 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 [2024-11-19 16:53:02,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 16:53:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 16:53:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 16:53:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 16:53:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 16:53:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 16:53:02,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 16:53:02,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 16:53:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-19 16:53:02,373 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-19 16:53:02,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 16:53:02,513 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 16:53:02,517 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 16:53:02,782 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-19 16:53:02,783 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 16:53:02,799 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 16:53:02,799 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 16:53:02,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:02 BoogieIcfgContainer [2024-11-19 16:53:02,800 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 16:53:02,801 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 16:53:02,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 16:53:02,805 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 16:53:02,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:01" (1/3) ... [2024-11-19 16:53:02,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639bb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:02, skipping insertion in model container [2024-11-19 16:53:02,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:02" (2/3) ... [2024-11-19 16:53:02,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639bb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:02, skipping insertion in model container [2024-11-19 16:53:02,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:02" (3/3) ... [2024-11-19 16:53:02,809 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-11-19 16:53:02,825 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 16:53:02,825 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 16:53:02,886 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 16:53:02,895 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;@4131a7f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 16:53:02,896 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 16:53:02,901 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) [2024-11-19 16:53:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 16:53:02,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:02,910 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] [2024-11-19 16:53:02,911 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:02,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1833527262, now seen corresponding path program 1 times [2024-11-19 16:53:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764711292] [2024-11-19 16:53:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 16:53:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-19 16:53:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:53:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 16:53:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764711292] [2024-11-19 16:53:03,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764711292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:53:03,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:53:03,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 16:53:03,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450512846] [2024-11-19 16:53:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:53:03,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 16:53:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 16:53:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 16:53:03,209 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) [2024-11-19 16:53:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:03,228 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-11-19 16:53:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 16:53:03,231 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 [2024-11-19 16:53:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:03,238 INFO L225 Difference]: With dead ends: 63 [2024-11-19 16:53:03,238 INFO L226 Difference]: Without dead ends: 29 [2024-11-19 16:53:03,241 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 [2024-11-19 16:53:03,243 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:03,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:53:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-19 16:53:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-19 16:53:03,273 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) [2024-11-19 16:53:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-19 16:53:03,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2024-11-19 16:53:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:03,276 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-19 16:53:03,276 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) [2024-11-19 16:53:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-19 16:53:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 16:53:03,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:03,279 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] [2024-11-19 16:53:03,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 16:53:03,279 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:03,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2011293254, now seen corresponding path program 1 times [2024-11-19 16:53:03,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:03,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938425079] [2024-11-19 16:53:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:03,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 16:53:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-19 16:53:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:53:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 16:53:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938425079] [2024-11-19 16:53:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938425079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:53:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:53:03,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 16:53:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961869860] [2024-11-19 16:53:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:53:03,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 16:53:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 16:53:03,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 16:53:03,532 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2024-11-19 16:53:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:03,580 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2024-11-19 16:53:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 16:53:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2024-11-19 16:53:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:03,582 INFO L225 Difference]: With dead ends: 55 [2024-11-19 16:53:03,582 INFO L226 Difference]: Without dead ends: 31 [2024-11-19 16:53:03,583 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 [2024-11-19 16:53:03,584 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 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 [2024-11-19 16:53:03,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:53:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-19 16:53:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-19 16:53:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2024-11-19 16:53:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-19 16:53:03,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 30 [2024-11-19 16:53:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:03,595 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-19 16:53:03,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2024-11-19 16:53:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-19 16:53:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 16:53:03,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:03,598 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, 1, 1] [2024-11-19 16:53:03,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 16:53:03,599 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:03,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1289163608, now seen corresponding path program 1 times [2024-11-19 16:53:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:03,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273270894] [2024-11-19 16:53:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,730 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-19 16:53:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-19 16:53:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-19 16:53:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 16:53:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273270894] [2024-11-19 16:53:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273270894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:03,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583102907] [2024-11-19 16:53:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:03,787 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) [2024-11-19 16:53:03,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 16:53:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:03,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 16:53:03,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 16:53:03,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 16:53:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583102907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:53:04,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:53:04,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-19 16:53:04,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395098166] [2024-11-19 16:53:04,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:04,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 16:53:04,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 16:53:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-19 16:53:04,061 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2024-11-19 16:53:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:04,179 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2024-11-19 16:53:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 16:53:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 32 [2024-11-19 16:53:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:04,182 INFO L225 Difference]: With dead ends: 64 [2024-11-19 16:53:04,182 INFO L226 Difference]: Without dead ends: 40 [2024-11-19 16:53:04,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-19 16:53:04,184 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:04,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 88 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:53:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-19 16:53:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-11-19 16:53:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2024-11-19 16:53:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-19 16:53:04,195 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 32 [2024-11-19 16:53:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:04,196 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-19 16:53:04,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2024-11-19 16:53:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-19 16:53:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 16:53:04,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:04,199 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-19 16:53:04,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 16:53:04,402 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 [2024-11-19 16:53:04,403 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:04,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -741098063, now seen corresponding path program 1 times [2024-11-19 16:53:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488245931] [2024-11-19 16:53:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:04,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:04,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:53:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:04,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-19 16:53:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:53:04,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:04,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488245931] [2024-11-19 16:53:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488245931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715426063] [2024-11-19 16:53:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:04,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:04,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:04,617 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) [2024-11-19 16:53:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 16:53:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:04,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 16:53:04,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 16:53:04,779 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 16:53:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715426063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:53:04,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:53:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-19 16:53:04,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295688721] [2024-11-19 16:53:04,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:53:04,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 16:53:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:04,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 16:53:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 16:53:04,786 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-11-19 16:53:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:04,830 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-19 16:53:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 16:53:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 46 [2024-11-19 16:53:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:04,832 INFO L225 Difference]: With dead ends: 53 [2024-11-19 16:53:04,832 INFO L226 Difference]: Without dead ends: 35 [2024-11-19 16:53:04,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 16:53:04,834 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 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 [2024-11-19 16:53:04,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:53:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-19 16:53:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-11-19 16:53:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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) [2024-11-19 16:53:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-19 16:53:04,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 46 [2024-11-19 16:53:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:04,847 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-19 16:53:04,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2024-11-19 16:53:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-19 16:53:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 16:53:04,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:04,849 INFO L215 NwaCegarLoop]: trace histogram [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, 1] [2024-11-19 16:53:04,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 16:53:05,049 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 [2024-11-19 16:53:05,050 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:05,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -84841073, now seen corresponding path program 1 times [2024-11-19 16:53:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:05,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088313372] [2024-11-19 16:53:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:05,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:06,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:06,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:53:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:07,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-19 16:53:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 16:53:07,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088313372] [2024-11-19 16:53:07,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088313372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:07,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180895706] [2024-11-19 16:53:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:07,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:07,449 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) [2024-11-19 16:53:07,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 16:53:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:07,614 WARN L253 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-19 16:53:07,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:07,723 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 [2024-11-19 16:53:08,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:08,162 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 40 [2024-11-19 16:53:08,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:08,935 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 [2024-11-19 16:53:09,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:09,155 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 [2024-11-19 16:53:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 16:53:09,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:13,217 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 127 treesize of output 113 [2024-11-19 16:53:13,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:13,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 83 [2024-11-19 16:53:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 16:53:13,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180895706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:53:13,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:53:13,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 30] total 77 [2024-11-19 16:53:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288843885] [2024-11-19 16:53:13,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:13,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-19 16:53:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-19 16:53:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=5376, Unknown=0, NotChecked=0, Total=5852 [2024-11-19 16:53:13,422 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 77 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 67 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:53:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:29,560 INFO L93 Difference]: Finished difference Result 478 states and 697 transitions. [2024-11-19 16:53:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2024-11-19 16:53:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 67 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2024-11-19 16:53:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:29,571 INFO L225 Difference]: With dead ends: 478 [2024-11-19 16:53:29,575 INFO L226 Difference]: Without dead ends: 470 [2024-11-19 16:53:29,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19339 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=5038, Invalid=52322, Unknown=0, NotChecked=0, Total=57360 [2024-11-19 16:53:29,597 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 742 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 6075 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 6351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 6075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:29,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 677 Invalid, 6351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 6075 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-19 16:53:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-19 16:53:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 214. [2024-11-19 16:53:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 188 states have (on average 1.3936170212765957) internal successors, (262), 199 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 12 states have return successors, (46), 11 states have call predecessors, (46), 13 states have call successors, (46) [2024-11-19 16:53:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 321 transitions. [2024-11-19 16:53:29,674 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 321 transitions. Word has length 48 [2024-11-19 16:53:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:29,676 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 321 transitions. [2024-11-19 16:53:29,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 67 states have internal predecessors, (109), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:53:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 321 transitions. [2024-11-19 16:53:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 16:53:29,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:29,682 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-19 16:53:29,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 16:53:29,884 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 [2024-11-19 16:53:29,884 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:29,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1705392919, now seen corresponding path program 1 times [2024-11-19 16:53:29,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:29,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676729229] [2024-11-19 16:53:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:29,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:30,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:30,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:53:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:30,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-19 16:53:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 16:53:30,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:30,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676729229] [2024-11-19 16:53:30,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676729229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:30,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364964671] [2024-11-19 16:53:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:30,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:30,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:30,672 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) [2024-11-19 16:53:30,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 16:53:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:30,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-19 16:53:30,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:30,769 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 8 treesize of output 1 [2024-11-19 16:53:30,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:30,856 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 [2024-11-19 16:53:30,947 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 [2024-11-19 16:53:30,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:53:30,988 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-19 16:53:30,988 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 [2024-11-19 16:53:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:53:31,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:31,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364964671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:31,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 16:53:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2024-11-19 16:53:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476714179] [2024-11-19 16:53:31,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:31,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 16:53:31,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 16:53:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-11-19 16:53:31,329 INFO L87 Difference]: Start difference. First operand 214 states and 321 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 16:53:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:32,101 INFO L93 Difference]: Finished difference Result 719 states and 1051 transitions. [2024-11-19 16:53:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 16:53:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2024-11-19 16:53:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:32,109 INFO L225 Difference]: With dead ends: 719 [2024-11-19 16:53:32,109 INFO L226 Difference]: Without dead ends: 618 [2024-11-19 16:53:32,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 16:53:32,112 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 136 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:32,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 544 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 16:53:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-19 16:53:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 417. [2024-11-19 16:53:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 373 states have (on average 1.3994638069705094) internal successors, (522), 389 states have internal predecessors, (522), 20 states have call successors, (20), 8 states have call predecessors, (20), 23 states have return successors, (79), 19 states have call predecessors, (79), 20 states have call successors, (79) [2024-11-19 16:53:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 621 transitions. [2024-11-19 16:53:32,179 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 621 transitions. Word has length 49 [2024-11-19 16:53:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:32,179 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 621 transitions. [2024-11-19 16:53:32,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 16:53:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 621 transitions. [2024-11-19 16:53:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 16:53:32,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:32,182 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-19 16:53:32,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 16:53:32,385 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 [2024-11-19 16:53:32,385 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:32,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1296174681, now seen corresponding path program 2 times [2024-11-19 16:53:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263860441] [2024-11-19 16:53:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:34,352 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:34,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:53:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:34,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 16:53:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 16:53:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:35,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263860441] [2024-11-19 16:53:35,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263860441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:35,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101201408] [2024-11-19 16:53:35,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:53:35,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:35,050 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) [2024-11-19 16:53:35,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 16:53:35,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:53:35,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:53:35,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-19 16:53:35,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:35,150 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 [2024-11-19 16:53:35,551 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 [2024-11-19 16:53:35,991 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 80 treesize of output 48 [2024-11-19 16:53:36,235 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 [2024-11-19 16:53:36,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 70 [2024-11-19 16:53:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 16:53:36,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:37,092 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 [2024-11-19 16:53:37,095 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 [2024-11-19 16:53:37,117 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 [2024-11-19 16:53:37,120 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 [2024-11-19 16:53:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:53:38,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101201408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:53:38,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:53:38,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 26] total 69 [2024-11-19 16:53:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033412393] [2024-11-19 16:53:38,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:38,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-19 16:53:38,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-19 16:53:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=4385, Unknown=0, NotChecked=0, Total=4692 [2024-11-19 16:53:38,427 INFO L87 Difference]: Start difference. First operand 417 states and 621 transitions. Second operand has 69 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 61 states have internal predecessors, (109), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:53:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:42,500 INFO L93 Difference]: Finished difference Result 885 states and 1322 transitions. [2024-11-19 16:53:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-19 16:53:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 61 states have internal predecessors, (109), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2024-11-19 16:53:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:42,511 INFO L225 Difference]: With dead ends: 885 [2024-11-19 16:53:42,513 INFO L226 Difference]: Without dead ends: 706 [2024-11-19 16:53:42,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=908, Invalid=12432, Unknown=0, NotChecked=0, Total=13340 [2024-11-19 16:53:42,517 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 485 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 2746 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:42,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 774 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2746 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-19 16:53:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2024-11-19 16:53:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 475. [2024-11-19 16:53:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 425 states have (on average 1.3929411764705881) internal successors, (592), 444 states have internal predecessors, (592), 23 states have call successors, (23), 9 states have call predecessors, (23), 26 states have return successors, (87), 21 states have call predecessors, (87), 23 states have call successors, (87) [2024-11-19 16:53:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 702 transitions. [2024-11-19 16:53:42,594 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 702 transitions. Word has length 49 [2024-11-19 16:53:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:42,594 INFO L471 AbstractCegarLoop]: Abstraction has 475 states and 702 transitions. [2024-11-19 16:53:42,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 61 states have internal predecessors, (109), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:53:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 702 transitions. [2024-11-19 16:53:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 16:53:42,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:42,597 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:53:42,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 16:53:42,798 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 [2024-11-19 16:53:42,798 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:42,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2027171743, now seen corresponding path program 3 times [2024-11-19 16:53:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:42,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978808901] [2024-11-19 16:53:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:44,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:44,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:53:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:44,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 16:53:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 16:53:45,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978808901] [2024-11-19 16:53:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978808901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010994512] [2024-11-19 16:53:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:53:45,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:45,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:45,258 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) [2024-11-19 16:53:45,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 16:53:45,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 16:53:45,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:53:45,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-19 16:53:45,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:45,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:53:45,625 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 40 [2024-11-19 16:53:46,163 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 98 treesize of output 65 [2024-11-19 16:53:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:53:46,354 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-19 16:53:46,355 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 117 treesize of output 72 [2024-11-19 16:53:46,561 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 [2024-11-19 16:53:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 16:53:46,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010994512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:47,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 16:53:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 49 [2024-11-19 16:53:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668180352] [2024-11-19 16:53:47,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:47,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-19 16:53:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-19 16:53:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2886, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 16:53:47,742 INFO L87 Difference]: Start difference. First operand 475 states and 702 transitions. Second operand has 49 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 42 states have internal predecessors, (84), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 16:53:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:50,248 INFO L93 Difference]: Finished difference Result 922 states and 1416 transitions. [2024-11-19 16:53:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-19 16:53:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 42 states have internal predecessors, (84), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2024-11-19 16:53:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:50,254 INFO L225 Difference]: With dead ends: 922 [2024-11-19 16:53:50,254 INFO L226 Difference]: Without dead ends: 814 [2024-11-19 16:53:50,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=485, Invalid=6321, Unknown=0, NotChecked=0, Total=6806 [2024-11-19 16:53:50,257 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:50,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 356 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 16:53:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2024-11-19 16:53:50,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 566. [2024-11-19 16:53:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 500 states have (on average 1.382) internal successors, (691), 525 states have internal predecessors, (691), 34 states have call successors, (34), 9 states have call predecessors, (34), 31 states have return successors, (163), 31 states have call predecessors, (163), 34 states have call successors, (163) [2024-11-19 16:53:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 888 transitions. [2024-11-19 16:53:50,342 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 888 transitions. Word has length 50 [2024-11-19 16:53:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:50,342 INFO L471 AbstractCegarLoop]: Abstraction has 566 states and 888 transitions. [2024-11-19 16:53:50,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 42 states have internal predecessors, (84), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 16:53:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 888 transitions. [2024-11-19 16:53:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 16:53:50,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:50,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:53:50,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 16:53:50,550 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 [2024-11-19 16:53:50,551 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:50,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash -974395857, now seen corresponding path program 4 times [2024-11-19 16:53:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:50,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265587381] [2024-11-19 16:53:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:50,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:50,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:50,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:53:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:51,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-19 16:53:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 16:53:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265587381] [2024-11-19 16:53:51,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265587381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:51,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586877177] [2024-11-19 16:53:51,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 16:53:51,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:51,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:51,050 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) [2024-11-19 16:53:51,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 16:53:51,129 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 16:53:51,129 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:53:51,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 16:53:51,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:51,153 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 8 treesize of output 1 [2024-11-19 16:53:51,241 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 26 treesize of output 11 [2024-11-19 16:53:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 16:53:51,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 16:53:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586877177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:53:51,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:53:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2024-11-19 16:53:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108303696] [2024-11-19 16:53:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:51,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 16:53:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 16:53:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-11-19 16:53:51,557 INFO L87 Difference]: Start difference. First operand 566 states and 888 transitions. Second operand has 29 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:53:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:53:53,458 INFO L93 Difference]: Finished difference Result 1467 states and 2199 transitions. [2024-11-19 16:53:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-19 16:53:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 50 [2024-11-19 16:53:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:53:53,467 INFO L225 Difference]: With dead ends: 1467 [2024-11-19 16:53:53,467 INFO L226 Difference]: Without dead ends: 919 [2024-11-19 16:53:53,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=645, Invalid=4325, Unknown=0, NotChecked=0, Total=4970 [2024-11-19 16:53:53,473 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 303 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-19 16:53:53,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 753 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-19 16:53:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2024-11-19 16:53:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 661. [2024-11-19 16:53:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 587 states have (on average 1.373083475298126) internal successors, (806), 616 states have internal predecessors, (806), 35 states have call successors, (35), 15 states have call predecessors, (35), 38 states have return successors, (112), 29 states have call predecessors, (112), 35 states have call successors, (112) [2024-11-19 16:53:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 953 transitions. [2024-11-19 16:53:53,578 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 953 transitions. Word has length 50 [2024-11-19 16:53:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:53:53,578 INFO L471 AbstractCegarLoop]: Abstraction has 661 states and 953 transitions. [2024-11-19 16:53:53,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:53:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 953 transitions. [2024-11-19 16:53:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 16:53:53,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:53:53,581 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-19 16:53:53,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 16:53:53,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:53,785 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:53:53,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:53:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1770713250, now seen corresponding path program 1 times [2024-11-19 16:53:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:53:53,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829102726] [2024-11-19 16:53:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:53,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:53:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:54,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:53:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:54,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:53:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:54,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-19 16:53:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:53:54,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:53:54,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829102726] [2024-11-19 16:53:54,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829102726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:53:54,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209243910] [2024-11-19 16:53:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:53:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:53:54,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:53:54,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:53:54,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 16:53:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:53:54,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 16:53:54,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:53:54,740 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 [2024-11-19 16:53:54,904 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 26 treesize of output 11 [2024-11-19 16:53:55,000 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 7 treesize of output 3 [2024-11-19 16:53:55,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 16:53:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 16:53:55,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:53:55,370 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 17 treesize of output 15 [2024-11-19 16:53:55,371 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 16 [2024-11-19 16:53:55,658 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 17 treesize of output 15 [2024-11-19 16:53:55,660 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 22 treesize of output 18 [2024-11-19 16:53:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:53:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209243910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:53:55,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:53:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 18] total 54 [2024-11-19 16:53:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220320204] [2024-11-19 16:53:55,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:53:55,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-19 16:53:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:53:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-19 16:53:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 16:53:55,717 INFO L87 Difference]: Start difference. First operand 661 states and 953 transitions. Second operand has 54 states, 50 states have (on average 2.44) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:54:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:54:00,443 INFO L93 Difference]: Finished difference Result 1268 states and 1772 transitions. [2024-11-19 16:54:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-19 16:54:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 50 states have (on average 2.44) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2024-11-19 16:54:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:54:00,449 INFO L225 Difference]: With dead ends: 1268 [2024-11-19 16:54:00,449 INFO L226 Difference]: Without dead ends: 959 [2024-11-19 16:54:00,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7805 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2916, Invalid=21264, Unknown=0, NotChecked=0, Total=24180 [2024-11-19 16:54:00,453 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 969 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-19 16:54:00,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 1279 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-19 16:54:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-19 16:54:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 688. [2024-11-19 16:54:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 609 states have (on average 1.3628899835796386) internal successors, (830), 639 states have internal predecessors, (830), 36 states have call successors, (36), 18 states have call predecessors, (36), 42 states have return successors, (101), 30 states have call predecessors, (101), 36 states have call successors, (101) [2024-11-19 16:54:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 967 transitions. [2024-11-19 16:54:00,555 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 967 transitions. Word has length 51 [2024-11-19 16:54:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:54:00,556 INFO L471 AbstractCegarLoop]: Abstraction has 688 states and 967 transitions. [2024-11-19 16:54:00,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 50 states have (on average 2.44) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-19 16:54:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 967 transitions. [2024-11-19 16:54:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 16:54:00,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:54:00,559 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2024-11-19 16:54:00,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 16:54:00,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 16:54:00,760 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:54:00,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:54:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -496326839, now seen corresponding path program 5 times [2024-11-19 16:54:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:54:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946867795] [2024-11-19 16:54:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:54:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:54:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:00,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-19 16:54:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:00,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 16:54:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:00,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-19 16:54:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:54:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:54:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946867795] [2024-11-19 16:54:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946867795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:54:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065428632] [2024-11-19 16:54:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 16:54:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:54:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:54:00,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:54:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 16:54:00,978 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-19 16:54:00,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:54:00,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 16:54:00,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:54:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 16:54:01,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:54:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:54:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065428632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:54:01,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:54:01,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-11-19 16:54:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474066163] [2024-11-19 16:54:01,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:54:01,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 16:54:01,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:54:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 16:54:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-19 16:54:01,115 INFO L87 Difference]: Start difference. First operand 688 states and 967 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 16:54:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:54:01,369 INFO L93 Difference]: Finished difference Result 1497 states and 2094 transitions. [2024-11-19 16:54:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 16:54:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-11-19 16:54:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:54:01,379 INFO L225 Difference]: With dead ends: 1497 [2024-11-19 16:54:01,379 INFO L226 Difference]: Without dead ends: 1244 [2024-11-19 16:54:01,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-19 16:54:01,381 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 128 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:54:01,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 355 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:54:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-11-19 16:54:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 851. [2024-11-19 16:54:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 758 states have (on average 1.3509234828496042) internal successors, (1024), 794 states have internal predecessors, (1024), 40 states have call successors, (40), 22 states have call predecessors, (40), 52 states have return successors, (123), 34 states have call predecessors, (123), 40 states have call successors, (123) [2024-11-19 16:54:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1187 transitions. [2024-11-19 16:54:01,507 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1187 transitions. Word has length 51 [2024-11-19 16:54:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:54:01,508 INFO L471 AbstractCegarLoop]: Abstraction has 851 states and 1187 transitions. [2024-11-19 16:54:01,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 16:54:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1187 transitions. [2024-11-19 16:54:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 16:54:01,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:54:01,512 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2024-11-19 16:54:01,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 16:54:01,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:54:01,716 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:54:01,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:54:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 971760938, now seen corresponding path program 2 times [2024-11-19 16:54:01,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:54:01,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624990319] [2024-11-19 16:54:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:54:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:54:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:01,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:54:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:01,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 16:54:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:01,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-19 16:54:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:54:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:54:01,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624990319] [2024-11-19 16:54:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624990319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:54:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609390557] [2024-11-19 16:54:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:54:01,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:54:01,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:54:01,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:54:01,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 16:54:01,901 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:54:01,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:54:01,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 16:54:01,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:54:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 16:54:01,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:54:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 16:54:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609390557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:54:02,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:54:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-11-19 16:54:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722608136] [2024-11-19 16:54:02,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:54:02,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 16:54:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:54:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 16:54:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-19 16:54:02,047 INFO L87 Difference]: Start difference. First operand 851 states and 1187 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 16:54:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:54:02,234 INFO L93 Difference]: Finished difference Result 995 states and 1364 transitions. [2024-11-19 16:54:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 16:54:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2024-11-19 16:54:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:54:02,239 INFO L225 Difference]: With dead ends: 995 [2024-11-19 16:54:02,239 INFO L226 Difference]: Without dead ends: 407 [2024-11-19 16:54:02,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-19 16:54:02,242 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 72 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:54:02,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 321 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:54:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-19 16:54:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 370. [2024-11-19 16:54:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 325 states have (on average 1.2861538461538462) internal successors, (418), 340 states have internal predecessors, (418), 23 states have call successors, (23), 10 states have call predecessors, (23), 21 states have return successors, (65), 19 states have call predecessors, (65), 23 states have call successors, (65) [2024-11-19 16:54:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 506 transitions. [2024-11-19 16:54:02,303 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 506 transitions. Word has length 52 [2024-11-19 16:54:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:54:02,303 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 506 transitions. [2024-11-19 16:54:02,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 16:54:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 506 transitions. [2024-11-19 16:54:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 16:54:02,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:54:02,305 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-19 16:54:02,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 16:54:02,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 16:54:02,506 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:54:02,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:54:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1054569149, now seen corresponding path program 6 times [2024-11-19 16:54:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:54:02,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638586699] [2024-11-19 16:54:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:54:02,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:54:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:02,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:54:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:02,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-19 16:54:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:02,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-19 16:54:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 16:54:02,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:54:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638586699] [2024-11-19 16:54:02,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638586699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:54:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182558697] [2024-11-19 16:54:02,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 16:54:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:54:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:54:02,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:54:02,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 16:54:02,726 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 16:54:02,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:54:02,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 16:54:02,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:54:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 16:54:02,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:54:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 16:54:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182558697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:54:02,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:54:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-19 16:54:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766017806] [2024-11-19 16:54:02,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:54:02,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 16:54:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:54:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 16:54:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-19 16:54:02,892 INFO L87 Difference]: Start difference. First operand 370 states and 506 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-19 16:54:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:54:03,120 INFO L93 Difference]: Finished difference Result 568 states and 754 transitions. [2024-11-19 16:54:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 16:54:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-11-19 16:54:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:54:03,123 INFO L225 Difference]: With dead ends: 568 [2024-11-19 16:54:03,123 INFO L226 Difference]: Without dead ends: 511 [2024-11-19 16:54:03,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-19 16:54:03,124 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 93 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:54:03,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 473 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:54:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-11-19 16:54:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 407. [2024-11-19 16:54:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 359 states have (on average 1.298050139275766) internal successors, (466), 378 states have internal predecessors, (466), 24 states have call successors, (24), 11 states have call predecessors, (24), 23 states have return successors, (62), 17 states have call predecessors, (62), 24 states have call successors, (62) [2024-11-19 16:54:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 552 transitions. [2024-11-19 16:54:03,187 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 552 transitions. Word has length 53 [2024-11-19 16:54:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:54:03,188 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 552 transitions. [2024-11-19 16:54:03,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-19 16:54:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 552 transitions. [2024-11-19 16:54:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 16:54:03,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:54:03,189 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:54:03,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 16:54:03,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 16:54:03,391 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:54:03,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:54:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2067276553, now seen corresponding path program 1 times [2024-11-19 16:54:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:54:03,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364048159] [2024-11-19 16:54:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:54:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:54:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:03,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-19 16:54:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:03,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 16:54:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:03,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-19 16:54:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:54:03,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:54:03,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364048159] [2024-11-19 16:54:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364048159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:54:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872779866] [2024-11-19 16:54:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:54:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:54:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:54:03,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:54:03,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 16:54:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:54:03,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 16:54:03,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:54:03,924 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 [2024-11-19 16:54:04,045 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 [2024-11-19 16:54:04,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-19 16:54:04,122 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 15 treesize of output 1 [2024-11-19 16:54:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 16:54:04,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:54:04,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-19 16:54:04,334 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 22 treesize of output 18 [2024-11-19 16:54:04,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-19 16:54:04,603 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 16 [2024-11-19 16:54:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:54:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872779866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:54:04,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:54:04,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 18] total 45 [2024-11-19 16:54:04,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300064294] [2024-11-19 16:54:04,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:54:04,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 16:54:04,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:54:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 16:54:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 16:54:04,660 INFO L87 Difference]: Start difference. First operand 407 states and 552 transitions. Second operand has 45 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-19 16:54:08,685 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] [2024-11-19 16:54:12,715 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]