./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:07:16,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:07:16,108 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:07:16,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:07:16,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:07:16,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:07:16,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:07:16,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:07:16,142 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:07:16,145 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:07:16,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:07:16,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:07:16,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:07:16,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:07:16,147 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:07:16,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:07:16,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:07:16,148 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:07:16,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:07:16,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:07:16,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:07:16,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:07:16,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:07:16,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:07:16,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:07:16,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:07:16,150 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:07:16,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:07:16,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:07:16,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:07:16,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:07:16,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:07:16,153 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:07:16,153 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:07:16,153 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:07:16,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:07:16,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:07:16,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:07:16,154 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:07:16,154 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:07:16,154 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:07:16,154 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:07:16,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:07:16,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:07:16,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:07:16,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:07:16,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:07:16,399 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:07:16,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2023-11-22 21:07:17,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:07:17,603 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:07:17,604 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2023-11-22 21:07:17,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0e29f43/861b82f873334b75a5a21e55c32049ca/FLAG719d71b1d [2023-11-22 21:07:17,622 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb0e29f43/861b82f873334b75a5a21e55c32049ca [2023-11-22 21:07:17,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:07:17,625 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:07:17,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:07:17,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:07:17,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:07:17,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613eb67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17, skipping insertion in model container [2023-11-22 21:07:17,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:07:17,759 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-22 21:07:17,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:07:17,779 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:07:17,789 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-22 21:07:17,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:07:17,811 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:07:17,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17 WrapperNode [2023-11-22 21:07:17,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:07:17,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:07:17,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:07:17,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:07:17,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,851 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-22 21:07:17,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:07:17,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:07:17,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:07:17,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:07:17,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,863 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:07:17,873 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:07:17,873 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:07:17,873 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:07:17,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (1/1) ... [2023-11-22 21:07:17,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:07:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:17,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:07:17,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:07:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:07:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:07:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:07:17,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:07:17,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:07:17,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:07:17,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:07:17,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-22 21:07:17,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-22 21:07:17,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:07:17,990 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:07:17,992 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:07:18,073 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:07:18,090 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:07:18,090 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-22 21:07:18,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:07:18 BoogieIcfgContainer [2023-11-22 21:07:18,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:07:18,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:07:18,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:07:18,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:07:18,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:07:17" (1/3) ... [2023-11-22 21:07:18,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e35d52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:07:18, skipping insertion in model container [2023-11-22 21:07:18,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:07:17" (2/3) ... [2023-11-22 21:07:18,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e35d52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:07:18, skipping insertion in model container [2023-11-22 21:07:18,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:07:18" (3/3) ... [2023-11-22 21:07:18,097 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2023-11-22 21:07:18,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:07:18,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:07:18,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:07:18,151 INFO L357 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, mHoare=true, 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;@658f438d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:07:18,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:07:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 21:07:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 21:07:18,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:18,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:07:18,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -670687716, now seen corresponding path program 1 times [2023-11-22 21:07:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:18,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413194406] [2023-11-22 21:07:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:18,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:18,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413194406] [2023-11-22 21:07:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413194406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:07:18,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 21:07:18,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 21:07:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223759852] [2023-11-22 21:07:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:07:18,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:07:18,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:07:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:07:18,472 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:07:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:18,506 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-11-22 21:07:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:07:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-22 21:07:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:18,513 INFO L225 Difference]: With dead ends: 40 [2023-11-22 21:07:18,513 INFO L226 Difference]: Without dead ends: 22 [2023-11-22 21:07:18,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 21:07:18,517 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:18,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:07:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-22 21:07:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2023-11-22 21:07:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-22 21:07:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-22 21:07:18,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2023-11-22 21:07:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:18,543 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-22 21:07:18,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:07:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-22 21:07:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-22 21:07:18,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:18,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:07:18,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 21:07:18,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:18,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1506992356, now seen corresponding path program 1 times [2023-11-22 21:07:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986952861] [2023-11-22 21:07:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986952861] [2023-11-22 21:07:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986952861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294680827] [2023-11-22 21:07:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:18,684 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) [2023-11-22 21:07:18,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:07:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:18,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 21:07:18,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:18,795 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 [2023-11-22 21:07:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:18,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:19,092 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 20 treesize of output 18 [2023-11-22 21:07:19,098 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 26 treesize of output 24 [2023-11-22 21:07:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294680827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:19,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 13 [2023-11-22 21:07:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144365230] [2023-11-22 21:07:19,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:19,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:07:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:19,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:07:19,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:07:19,124 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:07:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:19,322 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2023-11-22 21:07:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:07:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-22 21:07:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:19,323 INFO L225 Difference]: With dead ends: 49 [2023-11-22 21:07:19,323 INFO L226 Difference]: Without dead ends: 33 [2023-11-22 21:07:19,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:07:19,338 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:19,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 86 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:07:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-22 21:07:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-11-22 21:07:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:07:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-22 21:07:19,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2023-11-22 21:07:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:19,344 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-22 21:07:19,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 21:07:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-22 21:07:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 21:07:19,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:19,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:07:19,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:07:19,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:19,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:19,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1863960477, now seen corresponding path program 1 times [2023-11-22 21:07:19,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:19,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304279071] [2023-11-22 21:07:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:19,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:07:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 21:07:19,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:19,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304279071] [2023-11-22 21:07:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304279071] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745726456] [2023-11-22 21:07:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:19,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:19,704 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) [2023-11-22 21:07:19,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:07:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:19,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 21:07:19,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:19,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 21:07:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:19,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:20,066 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 23 treesize of output 21 [2023-11-22 21:07:20,068 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 30 treesize of output 26 [2023-11-22 21:07:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 21:07:20,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745726456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:20,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:20,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 19 [2023-11-22 21:07:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299190141] [2023-11-22 21:07:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-22 21:07:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-22 21:07:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-22 21:07:20,106 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:07:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:20,468 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2023-11-22 21:07:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-22 21:07:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-11-22 21:07:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:20,470 INFO L225 Difference]: With dead ends: 73 [2023-11-22 21:07:20,470 INFO L226 Difference]: Without dead ends: 48 [2023-11-22 21:07:20,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:07:20,471 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:20,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 123 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:07:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-22 21:07:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-11-22 21:07:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-22 21:07:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-22 21:07:20,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2023-11-22 21:07:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:20,478 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-22 21:07:20,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:07:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-22 21:07:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 21:07:20,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:20,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:07:20,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:07:20,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 21:07:20,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:20,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1166430656, now seen corresponding path program 1 times [2023-11-22 21:07:20,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:20,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601578126] [2023-11-22 21:07:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:20,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-22 21:07:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:20,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:07:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:07:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:20,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601578126] [2023-11-22 21:07:20,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601578126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:20,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255491237] [2023-11-22 21:07:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:20,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:20,817 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) [2023-11-22 21:07:20,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:07:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:20,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 21:07:20,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:20,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 21:07:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:07:21,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:21,222 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 22 treesize of output 20 [2023-11-22 21:07:21,224 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 28 treesize of output 24 [2023-11-22 21:07:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-22 21:07:21,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255491237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:21,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:21,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 13] total 23 [2023-11-22 21:07:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880286277] [2023-11-22 21:07:21,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 21:07:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 21:07:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-22 21:07:21,287 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 21:07:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:22,140 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2023-11-22 21:07:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-22 21:07:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-11-22 21:07:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:22,143 INFO L225 Difference]: With dead ends: 105 [2023-11-22 21:07:22,143 INFO L226 Difference]: Without dead ends: 72 [2023-11-22 21:07:22,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 21:07:22,145 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:22,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 149 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 21:07:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-22 21:07:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2023-11-22 21:07:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-22 21:07:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-11-22 21:07:22,170 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 30 [2023-11-22 21:07:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:22,170 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-11-22 21:07:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-22 21:07:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-11-22 21:07:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-22 21:07:22,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:22,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:07:22,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:07:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:22,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:22,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash -891463103, now seen corresponding path program 2 times [2023-11-22 21:07:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:22,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778795479] [2023-11-22 21:07:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-22 21:07:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:22,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:07:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:07:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-22 21:07:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778795479] [2023-11-22 21:07:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778795479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56037966] [2023-11-22 21:07:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:07:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:22,501 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) [2023-11-22 21:07:22,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:07:22,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:07:22,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:07:22,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-22 21:07:22,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:22,572 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 [2023-11-22 21:07:22,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-22 21:07:22,608 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 [2023-11-22 21:07:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:07:23,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:25,331 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 184 treesize of output 176 [2023-11-22 21:07:25,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 21:07:25,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1138 treesize of output 1106 [2023-11-22 21:07:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 21:07:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56037966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:25,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 24] total 47 [2023-11-22 21:07:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658461045] [2023-11-22 21:07:25,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-22 21:07:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-22 21:07:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2023-11-22 21:07:25,583 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 47 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 45 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-22 21:07:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:29,705 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2023-11-22 21:07:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 21:07:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 45 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2023-11-22 21:07:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:29,707 INFO L225 Difference]: With dead ends: 146 [2023-11-22 21:07:29,707 INFO L226 Difference]: Without dead ends: 88 [2023-11-22 21:07:29,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=987, Invalid=4563, Unknown=0, NotChecked=0, Total=5550 [2023-11-22 21:07:29,709 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:29,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 173 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 21:07:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-22 21:07:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2023-11-22 21:07:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-22 21:07:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-11-22 21:07:29,725 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 40 [2023-11-22 21:07:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:29,725 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-11-22 21:07:29,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 45 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-22 21:07:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-11-22 21:07:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-22 21:07:29,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:29,729 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-22 21:07:29,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-22 21:07:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:29,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1960854428, now seen corresponding path program 3 times [2023-11-22 21:07:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041140942] [2023-11-22 21:07:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:30,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:07:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-22 21:07:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:30,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:07:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-22 21:07:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 21:07:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041140942] [2023-11-22 21:07:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041140942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801437348] [2023-11-22 21:07:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:07:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:30,098 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) [2023-11-22 21:07:30,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:07:30,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-22 21:07:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:07:30,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-22 21:07:30,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-22 21:07:30,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 21:07:30,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801437348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:30,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:30,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2023-11-22 21:07:30,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738524878] [2023-11-22 21:07:30,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-22 21:07:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-22 21:07:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-11-22 21:07:30,376 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 21:07:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:30,681 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2023-11-22 21:07:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:07:30,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-11-22 21:07:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:30,683 INFO L225 Difference]: With dead ends: 198 [2023-11-22 21:07:30,683 INFO L226 Difference]: Without dead ends: 137 [2023-11-22 21:07:30,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2023-11-22 21:07:30,684 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:30,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 165 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 21:07:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-22 21:07:30,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2023-11-22 21:07:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 70 states have internal predecessors, (75), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-22 21:07:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-11-22 21:07:30,705 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 50 [2023-11-22 21:07:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:30,706 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-11-22 21:07:30,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-22 21:07:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-11-22 21:07:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 21:07:30,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:30,707 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-22 21:07:30,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:07:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:30,912 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:30,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash 488361172, now seen corresponding path program 4 times [2023-11-22 21:07:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122604553] [2023-11-22 21:07:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:31,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:07:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-22 21:07:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:31,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-22 21:07:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-22 21:07:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-22 21:07:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122604553] [2023-11-22 21:07:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122604553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563741178] [2023-11-22 21:07:31,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:07:31,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:31,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:31,211 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) [2023-11-22 21:07:31,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:07:31,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:07:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:07:31,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-22 21:07:31,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:07:31,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 21:07:31,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-22 21:07:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 21:07:31,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:07:33,177 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 195 treesize of output 191 [2023-11-22 21:07:33,307 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 209846254 treesize of output 209584110 [2023-11-22 21:07:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 107 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-22 21:07:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563741178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:07:36,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:07:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 24] total 54 [2023-11-22 21:07:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895254049] [2023-11-22 21:07:36,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:07:36,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-22 21:07:36,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:07:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-22 21:07:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 21:07:36,129 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 54 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 52 states have internal predecessors, (95), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-22 21:07:38,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 21:07:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:07:56,992 INFO L93 Difference]: Finished difference Result 283 states and 349 transitions. [2023-11-22 21:07:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-22 21:07:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 52 states have internal predecessors, (95), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 57 [2023-11-22 21:07:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:07:56,994 INFO L225 Difference]: With dead ends: 283 [2023-11-22 21:07:56,994 INFO L226 Difference]: Without dead ends: 212 [2023-11-22 21:07:56,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3558 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1699, Invalid=11411, Unknown=0, NotChecked=0, Total=13110 [2023-11-22 21:07:56,998 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 585 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-22 21:07:56,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 638 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1934 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2023-11-22 21:07:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-22 21:07:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 129. [2023-11-22 21:07:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 105 states have internal predecessors, (111), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-22 21:07:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2023-11-22 21:07:57,043 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 57 [2023-11-22 21:07:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:07:57,044 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2023-11-22 21:07:57,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.8269230769230769) internal successors, (95), 52 states have internal predecessors, (95), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-22 21:07:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2023-11-22 21:07:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-22 21:07:57,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:07:57,049 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-22 21:07:57,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 21:07:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:57,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:07:57,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:07:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -938938595, now seen corresponding path program 5 times [2023-11-22 21:07:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:07:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901472962] [2023-11-22 21:07:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:07:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:07:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:07:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-22 21:07:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-22 21:07:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-22 21:07:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-22 21:07:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:07:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:07:57,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:07:57,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901472962] [2023-11-22 21:07:57,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901472962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:07:57,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716413991] [2023-11-22 21:07:57,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:07:57,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:07:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:07:57,587 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) [2023-11-22 21:07:57,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15