./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:44:36,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:44:36,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:44:36,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:44:36,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:44:36,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:44:36,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:44:36,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:44:36,259 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:44:36,260 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:44:36,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:44:36,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:44:36,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:44:36,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:44:36,263 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:44:36,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:44:36,265 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:44:36,265 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:44:36,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:44:36,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:44:36,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:44:36,266 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:44:36,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:44:36,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:44:36,269 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:44:36,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:44:36,270 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:44:36,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:44:36,270 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:44:36,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:44:36,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:44:36,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:44:36,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:44:36,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:44:36,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:44:36,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:44:36,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:44:36,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2024-11-16 06:44:36,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:44:36,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:44:36,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:44:36,511 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:44:36,511 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:44:36,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-16 06:44:37,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:44:37,995 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:44:37,995 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-16 06:44:38,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44eca6db9/d4fd39a61d3e4ee2aa7dd994d2f4c7cc/FLAGfef68756f [2024-11-16 06:44:38,411 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44eca6db9/d4fd39a61d3e4ee2aa7dd994d2f4c7cc [2024-11-16 06:44:38,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:44:38,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:44:38,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:44:38,415 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:44:38,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:44:38,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea8fdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38, skipping insertion in model container [2024-11-16 06:44:38,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:44:38,646 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-16 06:44:38,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:44:38,678 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:44:38,688 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-16 06:44:38,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:44:38,707 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:44:38,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38 WrapperNode [2024-11-16 06:44:38,708 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:44:38,709 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:44:38,709 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:44:38,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:44:38,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,719 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,733 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2024-11-16 06:44:38,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:44:38,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:44:38,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:44:38,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:44:38,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,750 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-16 06:44:38,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,753 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,754 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:44:38,756 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:44:38,756 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:44:38,756 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:44:38,757 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (1/1) ... [2024-11-16 06:44:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:44:38,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:44:38,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 06:44:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 06:44:38,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:44:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 06:44:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 06:44:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 06:44:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 06:44:38,901 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:44:38,902 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:44:39,013 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-16 06:44:39,014 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:44:39,026 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:44:39,026 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:44:39,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:44:39 BoogieIcfgContainer [2024-11-16 06:44:39,028 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:44:39,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:44:39,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:44:39,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:44:39,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:44:38" (1/3) ... [2024-11-16 06:44:39,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7553cff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:44:39, skipping insertion in model container [2024-11-16 06:44:39,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:44:38" (2/3) ... [2024-11-16 06:44:39,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7553cff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:44:39, skipping insertion in model container [2024-11-16 06:44:39,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:44:39" (3/3) ... [2024-11-16 06:44:39,036 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-11-16 06:44:39,053 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:44:39,053 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:44:39,102 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:44:39,108 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@18b8f204, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:44:39,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:44:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2024-11-16 06:44:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-16 06:44:39,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:39,117 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:39,121 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:39,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1825996784, now seen corresponding path program 1 times [2024-11-16 06:44:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:39,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523615423] [2024-11-16 06:44:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:39,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523615423] [2024-11-16 06:44:39,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523615423] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:44:39,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:44:39,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 06:44:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062180944] [2024-11-16 06:44:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:44:39,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 06:44:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 06:44:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:44:39,303 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-11-16 06:44:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:44:39,328 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2024-11-16 06:44:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 06:44:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 12 [2024-11-16 06:44:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:44:39,340 INFO L225 Difference]: With dead ends: 45 [2024-11-16 06:44:39,340 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 06:44:39,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:44:39,351 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:44:39,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:44:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 06:44:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-16 06:44:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2024-11-16 06:44:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-16 06:44:39,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2024-11-16 06:44:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:44:39,438 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-16 06:44:39,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-11-16 06:44:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-16 06:44:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 06:44:39,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:39,442 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:39,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:44:39,444 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:39,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash -296747962, now seen corresponding path program 1 times [2024-11-16 06:44:39,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:39,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907946783] [2024-11-16 06:44:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:39,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:39,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907946783] [2024-11-16 06:44:39,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907946783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:44:39,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:44:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 06:44:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695671479] [2024-11-16 06:44:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:44:39,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 06:44:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 06:44:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:44:39,624 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-16 06:44:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:44:39,659 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-16 06:44:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 06:44:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2024-11-16 06:44:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:44:39,663 INFO L225 Difference]: With dead ends: 44 [2024-11-16 06:44:39,663 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 06:44:39,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:44:39,664 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:44:39,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:44:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 06:44:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-11-16 06:44:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-11-16 06:44:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-16 06:44:39,673 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2024-11-16 06:44:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:44:39,674 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-16 06:44:39,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-16 06:44:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-16 06:44:39,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-16 06:44:39,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:39,675 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:39,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 06:44:39,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:39,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash 263816359, now seen corresponding path program 1 times [2024-11-16 06:44:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:39,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378086228] [2024-11-16 06:44:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:39,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:39,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378086228] [2024-11-16 06:44:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378086228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:44:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382139234] [2024-11-16 06:44:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:39,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:44:39,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:44:39,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 06:44:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:39,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 06:44:39,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:44:39,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 06:44:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:39,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:44:40,233 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 [2024-11-16 06:44:40,237 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 [2024-11-16 06:44:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382139234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:44:40,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:44:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-11-16 06:44:40,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368474035] [2024-11-16 06:44:40,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:44:40,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 06:44:40,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 06:44:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-16 06:44:40,265 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-11-16 06:44:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:44:40,441 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-16 06:44:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 06:44:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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 15 [2024-11-16 06:44:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:44:40,443 INFO L225 Difference]: With dead ends: 60 [2024-11-16 06:44:40,443 INFO L226 Difference]: Without dead ends: 41 [2024-11-16 06:44:40,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-16 06:44:40,444 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:44:40,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:44:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-16 06:44:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-11-16 06:44:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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) [2024-11-16 06:44:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-16 06:44:40,461 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 15 [2024-11-16 06:44:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:44:40,462 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-16 06:44:40,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-11-16 06:44:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-16 06:44:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 06:44:40,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:40,463 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:40,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 06:44:40,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:40,663 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:40,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1929875072, now seen corresponding path program 1 times [2024-11-16 06:44:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734562415] [2024-11-16 06:44:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:40,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-16 06:44:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 06:44:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734562415] [2024-11-16 06:44:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734562415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:44:40,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160681733] [2024-11-16 06:44:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:40,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:44:40,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:44:40,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 06:44:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:40,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 06:44:40,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:44:40,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 06:44:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:41,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:44:45,429 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 [2024-11-16 06:44:45,432 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 [2024-11-16 06:44:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:44:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160681733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:44:45,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:44:45,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-11-16 06:44:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359380852] [2024-11-16 06:44:45,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:44:45,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 06:44:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 06:44:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2024-11-16 06:44:45,490 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2024-11-16 06:44:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:44:46,035 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-16 06:44:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 06:44:46,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 27 [2024-11-16 06:44:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:44:46,037 INFO L225 Difference]: With dead ends: 88 [2024-11-16 06:44:46,037 INFO L226 Difference]: Without dead ends: 59 [2024-11-16 06:44:46,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2024-11-16 06:44:46,038 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 06:44:46,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 181 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 06:44:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-16 06:44:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-11-16 06:44:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-16 06:44:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-16 06:44:46,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2024-11-16 06:44:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:44:46,046 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-16 06:44:46,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2024-11-16 06:44:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-16 06:44:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 06:44:46,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:46,048 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:46,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 06:44:46,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 06:44:46,251 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:46,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1331861913, now seen corresponding path program 1 times [2024-11-16 06:44:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:46,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305728092] [2024-11-16 06:44:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:46,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 06:44:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:46,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-16 06:44:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 06:44:46,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:46,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305728092] [2024-11-16 06:44:46,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305728092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:44:46,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723767554] [2024-11-16 06:44:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:46,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:44:46,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:44:46,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 06:44:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:46,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-16 06:44:46,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:44:46,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 06:44:46,490 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 21 treesize of output 20 [2024-11-16 06:44:46,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:44:46,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-16 06:44:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:44:46,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:44:48,220 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 100 treesize of output 96 [2024-11-16 06:44:48,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:44:48,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 526 treesize of output 516 [2024-11-16 06:44:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 06:44:48,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723767554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:44:48,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:44:48,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 18] total 33 [2024-11-16 06:44:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655073952] [2024-11-16 06:44:48,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:44:48,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 06:44:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 06:44:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 06:44:48,355 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 06:44:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:44:50,548 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2024-11-16 06:44:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 06:44:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2024-11-16 06:44:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:44:50,550 INFO L225 Difference]: With dead ends: 136 [2024-11-16 06:44:50,550 INFO L226 Difference]: Without dead ends: 98 [2024-11-16 06:44:50,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2024-11-16 06:44:50,554 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 06:44:50,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 222 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 06:44:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-16 06:44:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2024-11-16 06:44:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 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) [2024-11-16 06:44:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-16 06:44:50,566 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 39 [2024-11-16 06:44:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:44:50,566 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-16 06:44:50,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 32 states have internal predecessors, (80), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 06:44:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-16 06:44:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-16 06:44:50,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:44:50,575 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:44:50,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 06:44:50,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:50,777 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:44:50,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:44:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1617112306, now seen corresponding path program 2 times [2024-11-16 06:44:50,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:44:50,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672284424] [2024-11-16 06:44:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:44:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:44:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:50,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-16 06:44:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:50,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-16 06:44:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:50,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-16 06:44:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:44:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-16 06:44:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:44:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672284424] [2024-11-16 06:44:50,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672284424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:44:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558832408] [2024-11-16 06:44:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:44:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:44:50,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:44:50,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:44:50,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 06:44:50,933 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:44:50,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:44:50,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 06:44:50,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:44:50,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 06:44:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:44:51,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:44:59,564 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 [2024-11-16 06:44:59,567 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 [2024-11-16 06:44:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:44:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558832408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:44:59,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:44:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 27 [2024-11-16 06:44:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534106528] [2024-11-16 06:44:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:44:59,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 06:44:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:44:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 06:44:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=585, Unknown=2, NotChecked=0, Total=702 [2024-11-16 06:44:59,692 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 06:45:03,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 06:45:10,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:45:10,426 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2024-11-16 06:45:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-16 06:45:10,427 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 51 [2024-11-16 06:45:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:45:10,432 INFO L225 Difference]: With dead ends: 175 [2024-11-16 06:45:10,432 INFO L226 Difference]: Without dead ends: 108 [2024-11-16 06:45:10,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=387, Invalid=1681, Unknown=2, NotChecked=0, Total=2070 [2024-11-16 06:45:10,434 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-16 06:45:10,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 357 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2024-11-16 06:45:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-16 06:45:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2024-11-16 06:45:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.082191780821918) internal successors, (79), 74 states have internal predecessors, (79), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 06:45:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2024-11-16 06:45:10,474 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 51 [2024-11-16 06:45:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:45:10,474 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2024-11-16 06:45:10,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 06:45:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2024-11-16 06:45:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-16 06:45:10,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:45:10,479 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:45:10,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 06:45:10,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:45:10,680 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:45:10,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:45:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2055906421, now seen corresponding path program 3 times [2024-11-16 06:45:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:45:10,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230113664] [2024-11-16 06:45:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:45:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:45:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:10,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-16 06:45:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:10,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-16 06:45:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:10,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-16 06:45:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:10,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-16 06:45:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-16 06:45:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:45:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230113664] [2024-11-16 06:45:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230113664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:45:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769908878] [2024-11-16 06:45:10,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 06:45:10,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:45:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:45:10,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:45:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 06:45:11,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-16 06:45:11,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:45:11,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-16 06:45:11,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:45:11,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 06:45:11,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-16 06:45:11,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:45:11,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-16 06:45:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:45:11,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:45:33,166 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 154 treesize of output 148 [2024-11-16 06:45:33,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:45:33,200 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 2121 treesize of output 2073 [2024-11-16 06:45:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 74 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 06:45:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769908878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:45:33,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:45:33,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 21, 26] total 48 [2024-11-16 06:45:33,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139205224] [2024-11-16 06:45:33,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:45:33,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-16 06:45:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:45:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-16 06:45:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1921, Unknown=4, NotChecked=0, Total=2256 [2024-11-16 06:45:33,798 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-16 06:45:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:45:54,185 INFO L93 Difference]: Finished difference Result 220 states and 249 transitions. [2024-11-16 06:45:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-16 06:45:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 63 [2024-11-16 06:45:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:45:54,194 INFO L225 Difference]: With dead ends: 220 [2024-11-16 06:45:54,197 INFO L226 Difference]: Without dead ends: 146 [2024-11-16 06:45:54,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=1009, Invalid=4839, Unknown=4, NotChecked=0, Total=5852 [2024-11-16 06:45:54,199 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-16 06:45:54,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 514 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-16 06:45:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-16 06:45:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 135. [2024-11-16 06:45:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 113 states have internal predecessors, (122), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-16 06:45:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2024-11-16 06:45:54,251 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 63 [2024-11-16 06:45:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:45:54,252 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2024-11-16 06:45:54,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.6904761904761907) internal successors, (113), 46 states have internal predecessors, (113), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-16 06:45:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2024-11-16 06:45:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-16 06:45:54,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:45:54,255 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:45:54,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 06:45:54,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:45:54,455 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:45:54,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:45:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1892439396, now seen corresponding path program 4 times [2024-11-16 06:45:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:45:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80786668] [2024-11-16 06:45:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:45:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:45:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 06:45:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-16 06:45:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-16 06:45:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-16 06:45:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-16 06:45:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:45:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-16 06:45:54,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:45:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80786668] [2024-11-16 06:45:54,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80786668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:45:54,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028022544] [2024-11-16 06:45:54,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 06:45:54,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:45:54,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:45:54,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 06:45:54,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 06:45:54,828 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 06:45:54,828 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:45:54,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-16 06:45:54,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:45:54,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-16 06:45:54,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-16 06:45:54,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:45:54,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-16 06:45:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 18 proven. 117 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 06:45:55,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:45:59,674 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 153 treesize of output 147 [2024-11-16 06:45:59,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:45:59,683 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 1454 treesize of output 1422 [2024-11-16 06:46:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 29 proven. 109 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-16 06:46:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028022544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:46:00,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:46:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23, 28] total 52 [2024-11-16 06:46:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919928773] [2024-11-16 06:46:00,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:46:00,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-16 06:46:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:46:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-16 06:46:00,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2024-11-16 06:46:00,239 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 52 states, 46 states have (on average 2.760869565217391) internal successors, (127), 50 states have internal predecessors, (127), 13 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-16 06:46:17,154 WARN L286 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 106 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)