./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 23:51:39,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 23:51:39,634 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 23:51:39,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 23:51:39,639 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 23:51:39,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 23:51:39,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 23:51:39,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 23:51:39,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 23:51:39,660 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 23:51:39,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 23:51:39,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 23:51:39,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 23:51:39,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 23:51:39,663 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 23:51:39,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 23:51:39,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 23:51:39,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 23:51:39,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 23:51:39,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 23:51:39,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 23:51:39,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 23:51:39,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 23:51:39,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 23:51:39,670 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 23:51:39,670 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 23:51:39,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 23:51:39,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 23:51:39,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 23:51:39,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 23:51:39,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 23:51:39,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 23:51:39,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:51:39,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 23:51:39,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 23:51:39,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 23:51:39,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 23:51:39,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 23:51:39,675 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 23:51:39,675 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 23:51:39,676 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 23:51:39,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 23:51:39,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8828f6ff39cd2bcfba4fe3d04f0119d60137bcad91eabef2e2b840cbd0802b98 [2024-10-23 23:51:39,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 23:51:39,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 23:51:39,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 23:51:39,981 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 23:51:39,981 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 23:51:39,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2024-10-23 23:51:41,369 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 23:51:41,543 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 23:51:41,543 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c [2024-10-23 23:51:41,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9771640fa/db52fecf515947a781c9df60af27d2c1/FLAG6f0b0b7a3 [2024-10-23 23:51:41,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9771640fa/db52fecf515947a781c9df60af27d2c1 [2024-10-23 23:51:41,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 23:51:41,573 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 23:51:41,575 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 23:51:41,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 23:51:41,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 23:51:41,581 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,582 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7920f8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41, skipping insertion in model container [2024-10-23 23:51:41,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,601 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 23:51:41,744 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2024-10-23 23:51:41,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:51:41,763 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 23:51:41,783 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-2.c[322,335] [2024-10-23 23:51:41,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:51:41,799 INFO L204 MainTranslator]: Completed translation [2024-10-23 23:51:41,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41 WrapperNode [2024-10-23 23:51:41,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 23:51:41,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 23:51:41,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 23:51:41,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 23:51:41,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,825 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2024-10-23 23:51:41,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 23:51:41,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 23:51:41,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 23:51:41,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 23:51:41,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,845 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-23 23:51:41,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,849 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,850 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 23:51:41,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 23:51:41,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 23:51:41,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 23:51:41,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (1/1) ... [2024-10-23 23:51:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:51:41,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:41,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 23:51:41,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 23:51:41,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 23:51:41,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 23:51:41,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 23:51:41,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 23:51:41,970 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 23:51:41,971 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 23:51:42,089 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-23 23:51:42,089 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 23:51:42,108 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 23:51:42,108 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-23 23:51:42,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:51:42 BoogieIcfgContainer [2024-10-23 23:51:42,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 23:51:42,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 23:51:42,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 23:51:42,114 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 23:51:42,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 11:51:41" (1/3) ... [2024-10-23 23:51:42,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7509b0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:51:42, skipping insertion in model container [2024-10-23 23:51:42,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:51:41" (2/3) ... [2024-10-23 23:51:42,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7509b0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:51:42, skipping insertion in model container [2024-10-23 23:51:42,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:51:42" (3/3) ... [2024-10-23 23:51:42,117 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2024-10-23 23:51:42,134 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 23:51:42,134 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 23:51:42,196 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 23:51:42,205 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;@5253b44b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 23:51:42,205 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 23:51:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-23 23:51:42,215 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:42,216 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-23 23:51:42,217 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:42,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 68636575, now seen corresponding path program 1 times [2024-10-23 23:51:42,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:42,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884663868] [2024-10-23 23:51:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:42,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884663868] [2024-10-23 23:51:42,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884663868] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:51:42,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:51:42,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 23:51:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996907009] [2024-10-23 23:51:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:51:42,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 23:51:42,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 23:51:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:51:42,528 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:42,552 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2024-10-23 23:51:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 23:51:42,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-23 23:51:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:42,562 INFO L225 Difference]: With dead ends: 22 [2024-10-23 23:51:42,562 INFO L226 Difference]: Without dead ends: 11 [2024-10-23 23:51:42,564 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 [2024-10-23 23:51:42,567 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:42,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:51:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-23 23:51:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2024-10-23 23:51:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2024-10-23 23:51:42,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2024-10-23 23:51:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:42,589 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2024-10-23 23:51:42,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2024-10-23 23:51:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-23 23:51:42,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:42,590 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:51:42,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 23:51:42,591 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:42,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1829337052, now seen corresponding path program 1 times [2024-10-23 23:51:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:42,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511590725] [2024-10-23 23:51:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511590725] [2024-10-23 23:51:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511590725] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:51:42,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:51:42,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 23:51:42,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271502261] [2024-10-23 23:51:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:51:42,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 23:51:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 23:51:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:51:42,664 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:42,673 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2024-10-23 23:51:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 23:51:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-23 23:51:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:42,675 INFO L225 Difference]: With dead ends: 17 [2024-10-23 23:51:42,675 INFO L226 Difference]: Without dead ends: 10 [2024-10-23 23:51:42,675 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 [2024-10-23 23:51:42,676 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:42,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:51:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-10-23 23:51:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-10-23 23:51:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-10-23 23:51:42,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2024-10-23 23:51:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:42,680 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-10-23 23:51:42,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-10-23 23:51:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-23 23:51:42,681 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:42,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:51:42,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 23:51:42,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:42,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:42,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1803577202, now seen corresponding path program 1 times [2024-10-23 23:51:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947928761] [2024-10-23 23:51:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:42,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:42,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947928761] [2024-10-23 23:51:42,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947928761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699333962] [2024-10-23 23:51:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:42,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:42,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:42,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 23:51:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:42,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 23:51:42,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:42,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:42,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699333962] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:42,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:42,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-23 23:51:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353724308] [2024-10-23 23:51:42,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:42,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 23:51:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 23:51:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-23 23:51:42,950 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:42,998 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-10-23 23:51:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:51:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-23 23:51:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:42,999 INFO L225 Difference]: With dead ends: 21 [2024-10-23 23:51:42,999 INFO L226 Difference]: Without dead ends: 13 [2024-10-23 23:51:43,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-10-23 23:51:43,001 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:43,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:51:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-23 23:51:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-23 23:51:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-10-23 23:51:43,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2024-10-23 23:51:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:43,011 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-10-23 23:51:43,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-10-23 23:51:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-23 23:51:43,012 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:43,012 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:51:43,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-23 23:51:43,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:43,213 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:43,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1444604836, now seen corresponding path program 2 times [2024-10-23 23:51:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542728768] [2024-10-23 23:51:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:43,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:51:43,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:43,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542728768] [2024-10-23 23:51:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542728768] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:43,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787200989] [2024-10-23 23:51:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 23:51:43,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:43,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:43,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:43,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 23:51:43,459 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 23:51:43,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:51:43,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 23:51:43,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:51:43,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:51:43,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787200989] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:43,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2024-10-23 23:51:43,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715782773] [2024-10-23 23:51:43,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:43,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-23 23:51:43,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-23 23:51:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-23 23:51:43,695 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:44,122 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-10-23 23:51:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 23:51:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-23 23:51:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:44,123 INFO L225 Difference]: With dead ends: 49 [2024-10-23 23:51:44,123 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 23:51:44,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2024-10-23 23:51:44,127 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:44,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:51:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 23:51:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-23 23:51:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-10-23 23:51:44,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2024-10-23 23:51:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:44,144 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-10-23 23:51:44,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-10-23 23:51:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-23 23:51:44,146 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:44,146 INFO L215 NwaCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-23 23:51:44,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 23:51:44,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-23 23:51:44,352 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:44,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2139814053, now seen corresponding path program 3 times [2024-10-23 23:51:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882289598] [2024-10-23 23:51:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-10-23 23:51:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882289598] [2024-10-23 23:51:44,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882289598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480662411] [2024-10-23 23:51:44,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 23:51:44,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:44,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:44,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 23:51:44,667 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-23 23:51:44,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:51:44,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-23 23:51:44,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-23 23:51:44,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-23 23:51:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480662411] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:44,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:44,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-10-23 23:51:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834698246] [2024-10-23 23:51:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:44,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-23 23:51:44,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-23 23:51:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-10-23 23:51:44,820 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:44,952 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2024-10-23 23:51:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 23:51:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-23 23:51:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:44,955 INFO L225 Difference]: With dead ends: 88 [2024-10-23 23:51:44,955 INFO L226 Difference]: Without dead ends: 58 [2024-10-23 23:51:44,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2024-10-23 23:51:44,956 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:44,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:51:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-23 23:51:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-23 23:51:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-10-23 23:51:44,976 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 37 [2024-10-23 23:51:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:44,976 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-10-23 23:51:44,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-10-23 23:51:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-23 23:51:44,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:44,977 INFO L215 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-23 23:51:44,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 23:51:45,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:45,178 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:45,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 934366687, now seen corresponding path program 4 times [2024-10-23 23:51:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538622462] [2024-10-23 23:51:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-23 23:51:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538622462] [2024-10-23 23:51:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538622462] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755420920] [2024-10-23 23:51:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 23:51:45,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:45,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:45,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:45,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 23:51:45,485 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 23:51:45,485 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:51:45,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-23 23:51:45,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-23 23:51:45,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 30 proven. 752 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-10-23 23:51:45,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755420920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:45,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:45,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 22 [2024-10-23 23:51:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229480678] [2024-10-23 23:51:45,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:45,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-23 23:51:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-23 23:51:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2024-10-23 23:51:45,982 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:46,281 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2024-10-23 23:51:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 23:51:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-23 23:51:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:46,283 INFO L225 Difference]: With dead ends: 140 [2024-10-23 23:51:46,283 INFO L226 Difference]: Without dead ends: 136 [2024-10-23 23:51:46,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2024-10-23 23:51:46,285 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:46,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:51:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-23 23:51:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-10-23 23:51:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2024-10-23 23:51:46,317 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 57 [2024-10-23 23:51:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:46,318 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2024-10-23 23:51:46,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2024-10-23 23:51:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-23 23:51:46,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:46,325 INFO L215 NwaCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1] [2024-10-23 23:51:46,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-23 23:51:46,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:46,530 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:46,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1891032895, now seen corresponding path program 5 times [2024-10-23 23:51:46,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026269781] [2024-10-23 23:51:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2024-10-23 23:51:47,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:47,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026269781] [2024-10-23 23:51:47,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026269781] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:47,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130274552] [2024-10-23 23:51:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 23:51:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:47,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:47,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 23:51:47,593 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2024-10-23 23:51:47,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:51:47,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-23 23:51:47,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2024-10-23 23:51:47,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2024-10-23 23:51:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130274552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:48,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:48,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 4] total 16 [2024-10-23 23:51:48,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677052955] [2024-10-23 23:51:48,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:48,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-23 23:51:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-23 23:51:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-23 23:51:48,128 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:48,280 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2024-10-23 23:51:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 23:51:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-10-23 23:51:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:48,282 INFO L225 Difference]: With dead ends: 180 [2024-10-23 23:51:48,283 INFO L226 Difference]: Without dead ends: 174 [2024-10-23 23:51:48,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-23 23:51:48,284 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:48,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 219 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:51:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-23 23:51:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2024-10-23 23:51:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0810810810810811) internal successors, (160), 148 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2024-10-23 23:51:48,311 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 135 [2024-10-23 23:51:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:48,311 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2024-10-23 23:51:48,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2024-10-23 23:51:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-10-23 23:51:48,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:48,313 INFO L215 NwaCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1] [2024-10-23 23:51:48,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 23:51:48,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:48,518 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:48,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash -670622852, now seen corresponding path program 6 times [2024-10-23 23:51:48,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:48,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393886837] [2024-10-23 23:51:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:48,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-10-23 23:51:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:49,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393886837] [2024-10-23 23:51:49,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393886837] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:49,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769236662] [2024-10-23 23:51:49,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 23:51:49,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:49,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:49,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:49,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 23:51:50,094 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2024-10-23 23:51:50,094 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:51:50,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-23 23:51:50,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-10-23 23:51:50,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2024-10-23 23:51:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769236662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:50,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-10-23 23:51:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754063423] [2024-10-23 23:51:50,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:50,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-23 23:51:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-23 23:51:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2024-10-23 23:51:50,896 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:51:54,484 INFO L93 Difference]: Finished difference Result 335 states and 366 transitions. [2024-10-23 23:51:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 23:51:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-10-23 23:51:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:51:54,487 INFO L225 Difference]: With dead ends: 335 [2024-10-23 23:51:54,487 INFO L226 Difference]: Without dead ends: 331 [2024-10-23 23:51:54,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=516, Invalid=890, Unknown=0, NotChecked=0, Total=1406 [2024-10-23 23:51:54,488 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 23:51:54,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 346 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 23:51:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-10-23 23:51:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2024-10-23 23:51:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0787878787878789) internal successors, (356), 330 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 356 transitions. [2024-10-23 23:51:54,540 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 356 transitions. Word has length 148 [2024-10-23 23:51:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:51:54,540 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 356 transitions. [2024-10-23 23:51:54,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 26 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 23:51:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 356 transitions. [2024-10-23 23:51:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2024-10-23 23:51:54,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:51:54,545 INFO L215 NwaCegarLoop]: trace histogram [250, 25, 25, 25, 1, 1, 1, 1, 1] [2024-10-23 23:51:54,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 23:51:54,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:54,746 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:51:54,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:51:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash -551640676, now seen corresponding path program 7 times [2024-10-23 23:51:54,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:51:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146582628] [2024-10-23 23:51:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:51:54,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:51:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-10-23 23:51:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:51:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146582628] [2024-10-23 23:51:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146582628] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:51:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376520240] [2024-10-23 23:51:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 23:51:56,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:51:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:51:56,536 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:51:56,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 23:51:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:51:56,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-23 23:51:56,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:51:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-10-23 23:51:57,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:51:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38300 backedges. 0 proven. 36925 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2024-10-23 23:51:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376520240] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:51:58,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:51:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2024-10-23 23:51:58,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247717390] [2024-10-23 23:51:58,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:51:58,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-23 23:51:58,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:51:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-23 23:51:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2135, Unknown=0, NotChecked=0, Total=2970 [2024-10-23 23:51:58,597 INFO L87 Difference]: Start difference. First operand 331 states and 356 transitions. Second operand has 55 states, 55 states have (on average 3.8) internal successors, (209), 54 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)