./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.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 174cfd8cb6426614b32355f584844d4fc6265ba8fd3c3cda6c788ade64de4fc0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 21:28:12,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 21:28:12,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 21:28:12,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 21:28:12,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 21:28:12,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 21:28:12,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 21:28:12,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 21:28:12,855 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 21:28:12,855 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 21:28:12,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 21:28:12,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 21:28:12,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 21:28:12,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 21:28:12,858 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 21:28:12,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 21:28:12,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 21:28:12,859 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 21:28:12,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 21:28:12,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 21:28:12,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 21:28:12,865 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 21:28:12,865 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 21:28:12,865 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 21:28:12,865 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 21:28:12,865 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 21:28:12,866 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 21:28:12,866 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 21:28:12,866 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 21:28:12,866 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 21:28:12,866 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 21:28:12,867 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 21:28:12,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:28:12,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 21:28:12,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 21:28:12,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 21:28:12,868 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 21:28:12,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 21:28:12,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 21:28:12,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 21:28:12,870 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 21:28:12,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 21:28:12,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 174cfd8cb6426614b32355f584844d4fc6265ba8fd3c3cda6c788ade64de4fc0 [2024-11-19 21:28:13,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 21:28:13,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 21:28:13,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 21:28:13,155 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 21:28:13,155 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 21:28:13,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2024-11-19 21:28:14,527 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 21:28:14,691 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 21:28:14,691 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2024-11-19 21:28:14,698 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8438619/91bdd514372a49f9aa667cb684b5c7f6/FLAG61930be58 [2024-11-19 21:28:14,709 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8438619/91bdd514372a49f9aa667cb684b5c7f6 [2024-11-19 21:28:14,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 21:28:14,714 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 21:28:14,715 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 21:28:14,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 21:28:14,721 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 21:28:14,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:28:14" (1/1) ... [2024-11-19 21:28:14,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414ba4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:14, skipping insertion in model container [2024-11-19 21:28:14,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:28:14" (1/1) ... [2024-11-19 21:28:14,747 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 21:28:14,927 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c[526,539] [2024-11-19 21:28:14,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:28:14,958 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 21:28:14,973 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c[526,539] [2024-11-19 21:28:14,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:28:15,001 INFO L204 MainTranslator]: Completed translation [2024-11-19 21:28:15,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15 WrapperNode [2024-11-19 21:28:15,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 21:28:15,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 21:28:15,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 21:28:15,004 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 21:28:15,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,038 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-19 21:28:15,039 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 21:28:15,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 21:28:15,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 21:28:15,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 21:28:15,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,051 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,064 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-11-19 21:28:15,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 21:28:15,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 21:28:15,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 21:28:15,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 21:28:15,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (1/1) ... [2024-11-19 21:28:15,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:28:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:15,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 21:28:15,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 21:28:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 21:28:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 21:28:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 21:28:15,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 21:28:15,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 21:28:15,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 21:28:15,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 21:28:15,244 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 21:28:15,248 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 21:28:15,432 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-19 21:28:15,432 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 21:28:15,447 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 21:28:15,448 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 21:28:15,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:28:15 BoogieIcfgContainer [2024-11-19 21:28:15,448 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 21:28:15,450 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 21:28:15,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 21:28:15,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 21:28:15,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:28:14" (1/3) ... [2024-11-19 21:28:15,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abebb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:28:15, skipping insertion in model container [2024-11-19 21:28:15,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:28:15" (2/3) ... [2024-11-19 21:28:15,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abebb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:28:15, skipping insertion in model container [2024-11-19 21:28:15,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:28:15" (3/3) ... [2024-11-19 21:28:15,459 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.c [2024-11-19 21:28:15,491 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 21:28:15,495 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 21:28:15,600 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 21:28:15,606 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;@30e7fd0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 21:28:15,607 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 21:28:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-19 21:28:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 21:28:15,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:15,620 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:15,621 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:15,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2024-11-19 21:28:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:15,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609441437] [2024-11-19 21:28:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:28:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:15,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609441437] [2024-11-19 21:28:15,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609441437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:15,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:28:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 21:28:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275674221] [2024-11-19 21:28:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:15,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 21:28:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 21:28:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:28:15,795 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:28:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:15,810 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2024-11-19 21:28:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 21:28:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 21:28:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:15,816 INFO L225 Difference]: With dead ends: 49 [2024-11-19 21:28:15,816 INFO L226 Difference]: Without dead ends: 22 [2024-11-19 21:28:15,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:28:15,821 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:15,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:28:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-19 21:28:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-19 21:28:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:28:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-11-19 21:28:15,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2024-11-19 21:28:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:15,851 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-11-19 21:28:15,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:28:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-11-19 21:28:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 21:28:15,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:15,852 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:15,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 21:28:15,852 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:15,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2024-11-19 21:28:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:15,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441500378] [2024-11-19 21:28:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:28:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:16,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441500378] [2024-11-19 21:28:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441500378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:16,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:28:16,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:28:16,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462827660] [2024-11-19 21:28:16,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:16,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:16,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:16,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:28:16,005 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:28:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:16,076 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-19 21:28:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 21:28:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:16,078 INFO L225 Difference]: With dead ends: 35 [2024-11-19 21:28:16,078 INFO L226 Difference]: Without dead ends: 33 [2024-11-19 21:28:16,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:28:16,079 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:16,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:28:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-19 21:28:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2024-11-19 21:28:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:28:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-19 21:28:16,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-19 21:28:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:16,095 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-19 21:28:16,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:28:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-19 21:28:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-19 21:28:16,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:16,097 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:16,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 21:28:16,098 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:16,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2024-11-19 21:28:16,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:16,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336999727] [2024-11-19 21:28:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:16,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 21:28:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:28:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336999727] [2024-11-19 21:28:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336999727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:16,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:28:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:28:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654906814] [2024-11-19 21:28:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:16,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:28:16,258 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:28:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:16,329 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-19 21:28:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:16,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-19 21:28:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:16,332 INFO L225 Difference]: With dead ends: 39 [2024-11-19 21:28:16,333 INFO L226 Difference]: Without dead ends: 37 [2024-11-19 21:28:16,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:28:16,335 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:16,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:28:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-19 21:28:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-11-19 21:28:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 21:28:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-11-19 21:28:16,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2024-11-19 21:28:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:16,347 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-11-19 21:28:16,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 21:28:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-11-19 21:28:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-19 21:28:16,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:16,349 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:16,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 21:28:16,349 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:16,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2024-11-19 21:28:16,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52281240] [2024-11-19 21:28:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:16,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:16,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229078494] [2024-11-19 21:28:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:16,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:16,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:16,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 21:28:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:16,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 21:28:16,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:28:16,575 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:28:16,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:16,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52281240] [2024-11-19 21:28:16,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:16,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229078494] [2024-11-19 21:28:16,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229078494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:16,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:28:16,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:28:16,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679857209] [2024-11-19 21:28:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:16,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:16,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:28:16,581 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:28:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:16,667 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2024-11-19 21:28:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-19 21:28:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:16,669 INFO L225 Difference]: With dead ends: 56 [2024-11-19 21:28:16,671 INFO L226 Difference]: Without dead ends: 43 [2024-11-19 21:28:16,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:28:16,672 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:16,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:28:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-19 21:28:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-19 21:28:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 21:28:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-19 21:28:16,691 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 19 [2024-11-19 21:28:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:16,691 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-19 21:28:16,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 21:28:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-19 21:28:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 21:28:16,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:16,692 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:16,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 21:28:16,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:16,898 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:16,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2024-11-19 21:28:16,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:16,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704504587] [2024-11-19 21:28:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354315715] [2024-11-19 21:28:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:16,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:16,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:16,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 21:28:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:16,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:28:16,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:28:17,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:28:17,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704504587] [2024-11-19 21:28:17,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354315715] [2024-11-19 21:28:17,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354315715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:17,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:28:17,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-19 21:28:17,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804723153] [2024-11-19 21:28:17,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:17,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:28:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:28:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:28:17,254 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 21:28:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:17,404 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-11-19 21:28:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 21:28:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-19 21:28:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:17,405 INFO L225 Difference]: With dead ends: 56 [2024-11-19 21:28:17,406 INFO L226 Difference]: Without dead ends: 54 [2024-11-19 21:28:17,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-19 21:28:17,407 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:17,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:28:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-19 21:28:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-19 21:28:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-19 21:28:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-19 21:28:17,417 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 26 [2024-11-19 21:28:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:17,417 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-19 21:28:17,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 21:28:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-19 21:28:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 21:28:17,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:17,419 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:17,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 21:28:17,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:17,624 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:17,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2024-11-19 21:28:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:17,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949949275] [2024-11-19 21:28:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:17,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273648625] [2024-11-19 21:28:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:17,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:17,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:17,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 21:28:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:17,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 21:28:17,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 21:28:17,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 21:28:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949949275] [2024-11-19 21:28:17,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273648625] [2024-11-19 21:28:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273648625] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 21:28:17,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:28:17,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-19 21:28:17,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945079855] [2024-11-19 21:28:17,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:17,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:17,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:17,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:28:17,923 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:28:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:18,826 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-19 21:28:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:18,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-19 21:28:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:18,829 INFO L225 Difference]: With dead ends: 63 [2024-11-19 21:28:18,829 INFO L226 Difference]: Without dead ends: 61 [2024-11-19 21:28:18,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:28:18,830 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:18,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 21:28:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-19 21:28:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-19 21:28:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-19 21:28:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-11-19 21:28:18,845 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 36 [2024-11-19 21:28:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:18,845 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-11-19 21:28:18,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 21:28:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-11-19 21:28:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 21:28:18,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:18,847 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:18,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 21:28:19,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:19,048 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:19,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1438911711, now seen corresponding path program 1 times [2024-11-19 21:28:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360245218] [2024-11-19 21:28:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 21:28:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 21:28:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 21:28:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 21:28:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-19 21:28:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-19 21:28:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-19 21:28:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:19,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360245218] [2024-11-19 21:28:19,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360245218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:19,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:28:19,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 21:28:19,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466635412] [2024-11-19 21:28:19,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:19,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:28:19,229 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-19 21:28:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:19,276 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-11-19 21:28:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-11-19 21:28:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:19,280 INFO L225 Difference]: With dead ends: 68 [2024-11-19 21:28:19,280 INFO L226 Difference]: Without dead ends: 56 [2024-11-19 21:28:19,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:28:19,281 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:19,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:28:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-19 21:28:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-19 21:28:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-19 21:28:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-19 21:28:19,300 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2024-11-19 21:28:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:19,304 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-19 21:28:19,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-19 21:28:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-19 21:28:19,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 21:28:19,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:19,306 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:19,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 21:28:19,306 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:19,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2024-11-19 21:28:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951887313] [2024-11-19 21:28:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:19,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986761107] [2024-11-19 21:28:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:19,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:19,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 21:28:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:19,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 21:28:19,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-19 21:28:19,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-19 21:28:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951887313] [2024-11-19 21:28:20,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:20,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986761107] [2024-11-19 21:28:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986761107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:20,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:28:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-19 21:28:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263948792] [2024-11-19 21:28:20,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:20,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 21:28:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 21:28:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:28:20,915 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-19 21:28:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:21,473 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2024-11-19 21:28:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 21:28:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2024-11-19 21:28:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:21,475 INFO L225 Difference]: With dead ends: 131 [2024-11-19 21:28:21,476 INFO L226 Difference]: Without dead ends: 108 [2024-11-19 21:28:21,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-19 21:28:21,477 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:21,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 167 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:28:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-19 21:28:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-19 21:28:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.21875) internal successors, (78), 69 states have internal predecessors, (78), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-19 21:28:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2024-11-19 21:28:21,506 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 56 [2024-11-19 21:28:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:21,506 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2024-11-19 21:28:21,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-19 21:28:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2024-11-19 21:28:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-19 21:28:21,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:21,508 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:21,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 21:28:21,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:21,713 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:21,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2024-11-19 21:28:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:21,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368655698] [2024-11-19 21:28:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:21,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553507812] [2024-11-19 21:28:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:21,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:21,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:21,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 21:28:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:21,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 21:28:21,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-19 21:28:22,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-19 21:28:22,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:22,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368655698] [2024-11-19 21:28:22,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:22,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553507812] [2024-11-19 21:28:22,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553507812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:22,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:28:22,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-19 21:28:22,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020412399] [2024-11-19 21:28:22,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:22,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 21:28:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 21:28:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-19 21:28:22,620 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-19 21:28:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:23,037 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2024-11-19 21:28:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 21:28:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 67 [2024-11-19 21:28:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:23,039 INFO L225 Difference]: With dead ends: 161 [2024-11-19 21:28:23,039 INFO L226 Difference]: Without dead ends: 129 [2024-11-19 21:28:23,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-19 21:28:23,041 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:23,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 202 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:28:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-19 21:28:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2024-11-19 21:28:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 68 states have internal predecessors, (74), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-19 21:28:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2024-11-19 21:28:23,070 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 67 [2024-11-19 21:28:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:23,070 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2024-11-19 21:28:23,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-19 21:28:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2024-11-19 21:28:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-19 21:28:23,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:23,072 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:23,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 21:28:23,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:23,273 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:23,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:23,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1947386788, now seen corresponding path program 1 times [2024-11-19 21:28:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:23,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712117176] [2024-11-19 21:28:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 21:28:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 21:28:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 21:28:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 21:28:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-19 21:28:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 21:28:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-19 21:28:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-19 21:28:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:28:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,504 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-11-19 21:28:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-19 21:28:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:28:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712117176] [2024-11-19 21:28:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712117176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:28:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980370917] [2024-11-19 21:28:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:23,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:23,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:23,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 21:28:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:23,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 21:28:23,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-19 21:28:23,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 21:28:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980370917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:28:23,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 21:28:23,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-19 21:28:23,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531216177] [2024-11-19 21:28:23,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:28:23,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 21:28:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 21:28:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-19 21:28:23,711 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-19 21:28:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:23,804 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2024-11-19 21:28:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:28:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2024-11-19 21:28:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:23,807 INFO L225 Difference]: With dead ends: 140 [2024-11-19 21:28:23,808 INFO L226 Difference]: Without dead ends: 96 [2024-11-19 21:28:23,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:28:23,811 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:23,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:28:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-19 21:28:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2024-11-19 21:28:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-19 21:28:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2024-11-19 21:28:23,843 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 72 [2024-11-19 21:28:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:23,843 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2024-11-19 21:28:23,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-19 21:28:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2024-11-19 21:28:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-19 21:28:23,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:23,845 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:23,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 21:28:24,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:24,046 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:24,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2024-11-19 21:28:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:24,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729340215] [2024-11-19 21:28:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:24,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 21:28:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 21:28:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 21:28:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 21:28:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-19 21:28:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 21:28:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-19 21:28:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-19 21:28:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-19 21:28:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-11-19 21:28:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-11-19 21:28:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:28:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729340215] [2024-11-19 21:28:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729340215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:28:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736107291] [2024-11-19 21:28:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:24,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:24,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 21:28:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:24,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 21:28:24,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:28:24,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-19 21:28:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736107291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:25,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:28:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-19 21:28:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301706583] [2024-11-19 21:28:25,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:25,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:28:25,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:28:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:28:25,103 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-19 21:28:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:25,298 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-11-19 21:28:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 21:28:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 72 [2024-11-19 21:28:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:25,300 INFO L225 Difference]: With dead ends: 110 [2024-11-19 21:28:25,300 INFO L226 Difference]: Without dead ends: 79 [2024-11-19 21:28:25,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-19 21:28:25,302 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:25,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 219 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:28:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-19 21:28:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-19 21:28:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-19 21:28:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2024-11-19 21:28:25,324 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 72 [2024-11-19 21:28:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:25,324 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2024-11-19 21:28:25,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-19 21:28:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2024-11-19 21:28:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-19 21:28:25,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:25,326 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:25,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 21:28:25,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:25,531 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:25,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2024-11-19 21:28:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460041311] [2024-11-19 21:28:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:25,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094631700] [2024-11-19 21:28:25,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:28:25,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:25,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:25,570 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:25,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 21:28:25,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:28:25,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:28:25,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 21:28:25,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-19 21:28:26,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-19 21:28:35,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:35,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460041311] [2024-11-19 21:28:35,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:35,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094631700] [2024-11-19 21:28:35,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094631700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:35,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:28:35,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-19 21:28:35,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782573396] [2024-11-19 21:28:35,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:35,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:28:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:28:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:28:35,763 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-19 21:28:41,725 WARN L286 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 21:28:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:45,953 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2024-11-19 21:28:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 21:28:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 86 [2024-11-19 21:28:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:45,956 INFO L225 Difference]: With dead ends: 157 [2024-11-19 21:28:45,956 INFO L226 Difference]: Without dead ends: 138 [2024-11-19 21:28:45,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:28:45,957 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:45,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-19 21:28:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-19 21:28:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2024-11-19 21:28:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 38 states have call successors, (38), 13 states have call predecessors, (38), 13 states have return successors, (37), 32 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-19 21:28:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2024-11-19 21:28:46,001 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 86 [2024-11-19 21:28:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:46,002 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2024-11-19 21:28:46,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-19 21:28:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2024-11-19 21:28:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-19 21:28:46,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:46,003 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:46,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 21:28:46,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 21:28:46,204 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:46,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1231859808, now seen corresponding path program 1 times [2024-11-19 21:28:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:46,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921775449] [2024-11-19 21:28:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:28:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626237186] [2024-11-19 21:28:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:46,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:46,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:46,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 21:28:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:46,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 21:28:46,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-19 21:28:46,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-19 21:28:50,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:50,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921775449] [2024-11-19 21:28:50,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 21:28:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626237186] [2024-11-19 21:28:50,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626237186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:50,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:28:50,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-11-19 21:28:50,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094567738] [2024-11-19 21:28:50,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:50,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 21:28:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 21:28:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:28:50,046 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-19 21:28:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:55,485 INFO L93 Difference]: Finished difference Result 195 states and 264 transitions. [2024-11-19 21:28:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 21:28:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2024-11-19 21:28:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:55,489 INFO L225 Difference]: With dead ends: 195 [2024-11-19 21:28:55,489 INFO L226 Difference]: Without dead ends: 193 [2024-11-19 21:28:55,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2024-11-19 21:28:55,492 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:55,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 214 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 21:28:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-19 21:28:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 177. [2024-11-19 21:28:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 115 states have internal predecessors, (130), 54 states have call successors, (54), 15 states have call predecessors, (54), 15 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-19 21:28:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2024-11-19 21:28:55,575 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 97 [2024-11-19 21:28:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:28:55,575 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2024-11-19 21:28:55,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-19 21:28:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2024-11-19 21:28:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-19 21:28:55,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:28:55,578 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:28:55,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 21:28:55,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 21:28:55,781 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:28:55,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:28:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash -930866627, now seen corresponding path program 1 times [2024-11-19 21:28:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:28:55,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182603093] [2024-11-19 21:28:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:55,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:28:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-19 21:28:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 21:28:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 21:28:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 21:28:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-19 21:28:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-19 21:28:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-19 21:28:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-19 21:28:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-19 21:28:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-19 21:28:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-19 21:28:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-11-19 21:28:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-19 21:28:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-11-19 21:28:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-11-19 21:28:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-19 21:28:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-19 21:28:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:28:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182603093] [2024-11-19 21:28:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182603093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:28:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936916719] [2024-11-19 21:28:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:28:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:28:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:28:56,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:28:56,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 21:28:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:28:56,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-19 21:28:56,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:28:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-19 21:28:56,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:28:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-19 21:28:58,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936916719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:28:58,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:28:58,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 30 [2024-11-19 21:28:58,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435743466] [2024-11-19 21:28:58,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:28:58,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 21:28:58,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:28:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 21:28:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-11-19 21:28:58,301 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-11-19 21:28:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:28:59,936 INFO L93 Difference]: Finished difference Result 258 states and 359 transitions. [2024-11-19 21:28:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 21:28:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) Word has length 102 [2024-11-19 21:28:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:28:59,938 INFO L225 Difference]: With dead ends: 258 [2024-11-19 21:28:59,938 INFO L226 Difference]: Without dead ends: 242 [2024-11-19 21:28:59,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2024-11-19 21:28:59,939 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 21:28:59,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 414 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 21:28:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-19 21:29:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 222. [2024-11-19 21:29:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 142 states have internal predecessors, (154), 71 states have call successors, (71), 18 states have call predecessors, (71), 18 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-19 21:29:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 294 transitions. [2024-11-19 21:29:00,045 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 294 transitions. Word has length 102 [2024-11-19 21:29:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:29:00,046 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 294 transitions. [2024-11-19 21:29:00,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 17 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 17 states have call predecessors, (47), 17 states have call successors, (47) [2024-11-19 21:29:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 294 transitions. [2024-11-19 21:29:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-19 21:29:00,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:29:00,048 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:29:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 21:29:00,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 21:29:00,251 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:29:00,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:29:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 1 times [2024-11-19 21:29:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:29:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746847463] [2024-11-19 21:29:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:29:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:29:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 21:29:00,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802484642] [2024-11-19 21:29:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:29:00,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:29:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:29:00,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:29:00,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 21:29:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:29:00,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-19 21:29:00,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:29:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-19 21:29:00,841 INFO L311 TraceCheckSpWp]: Computing backward predicates...