./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.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 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 01:31:44,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 01:31:44,690 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 01:31:44,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 01:31:44,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 01:31:44,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 01:31:44,726 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 01:31:44,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 01:31:44,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 01:31:44,727 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 01:31:44,727 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 01:31:44,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 01:31:44,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 01:31:44,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 01:31:44,730 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 01:31:44,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 01:31:44,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 01:31:44,731 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 01:31:44,731 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 01:31:44,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 01:31:44,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 01:31:44,733 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 01:31:44,733 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 01:31:44,733 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 01:31:44,733 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 01:31:44,734 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 01:31:44,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 01:31:44,734 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 01:31:44,734 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 01:31:44,735 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 01:31:44,735 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 01:31:44,735 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 01:31:44,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:31:44,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 01:31:44,736 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 01:31:44,736 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 01:31:44,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 01:31:44,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 01:31:44,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 01:31:44,737 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 01:31:44,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 01:31:44,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 01:31:44,737 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf [2024-11-22 01:31:44,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 01:31:44,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 01:31:44,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 01:31:44,956 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 01:31:44,956 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 01:31:44,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2024-11-22 01:31:46,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 01:31:46,404 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 01:31:46,405 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2024-11-22 01:31:46,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5688c7a/442da7e4e6c64823981f80ee8c08671f/FLAG34cf8d634 [2024-11-22 01:31:46,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5688c7a/442da7e4e6c64823981f80ee8c08671f [2024-11-22 01:31:46,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 01:31:46,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 01:31:46,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 01:31:46,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 01:31:46,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 01:31:46,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,439 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f95ef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46, skipping insertion in model container [2024-11-22 01:31:46,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,457 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 01:31:46,599 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_unwindbound50.c[526,539] [2024-11-22 01:31:46,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:31:46,623 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 01:31:46,633 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_unwindbound50.c[526,539] [2024-11-22 01:31:46,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 01:31:46,651 INFO L204 MainTranslator]: Completed translation [2024-11-22 01:31:46,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46 WrapperNode [2024-11-22 01:31:46,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 01:31:46,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 01:31:46,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 01:31:46,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 01:31:46,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,677 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-11-22 01:31:46,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 01:31:46,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 01:31:46,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 01:31:46,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 01:31:46,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,705 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]. [2024-11-22 01:31:46,708 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 01:31:46,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 01:31:46,721 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 01:31:46,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 01:31:46,722 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (1/1) ... [2024-11-22 01:31:46,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 01:31:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:46,750 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) [2024-11-22 01:31:46,752 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 [2024-11-22 01:31:46,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 01:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 01:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 01:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 01:31:46,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 01:31:46,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 01:31:46,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 01:31:46,861 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 01:31:46,864 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 01:31:46,959 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-22 01:31:46,959 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 01:31:46,967 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 01:31:46,967 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-22 01:31:46,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:31:46 BoogieIcfgContainer [2024-11-22 01:31:46,968 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 01:31:46,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 01:31:46,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 01:31:46,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 01:31:46,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:31:46" (1/3) ... [2024-11-22 01:31:46,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e320f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:31:46, skipping insertion in model container [2024-11-22 01:31:46,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:31:46" (2/3) ... [2024-11-22 01:31:46,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e320f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:31:46, skipping insertion in model container [2024-11-22 01:31:46,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:31:46" (3/3) ... [2024-11-22 01:31:46,974 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound50.c [2024-11-22 01:31:46,985 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 01:31:46,985 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 01:31:47,031 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 01:31:47,037 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;@eae29f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 01:31:47,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 01:31:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2024-11-22 01:31:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-22 01:31:47,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,048 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:47,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2024-11-22 01:31:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736081465] [2024-11-22 01:31:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:31:47,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736081465] [2024-11-22 01:31:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736081465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:47,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:47,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 01:31:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328249118] [2024-11-22 01:31:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:47,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 01:31:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:47,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 01:31:47,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 01:31:47,179 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-22 01:31:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:47,193 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2024-11-22 01:31:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 01:31:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2024-11-22 01:31:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:47,199 INFO L225 Difference]: With dead ends: 50 [2024-11-22 01:31:47,199 INFO L226 Difference]: Without dead ends: 22 [2024-11-22 01:31:47,201 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 [2024-11-22 01:31:47,203 INFO L432 NwaCegarLoop]: 36 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, 36 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 [2024-11-22 01:31:47,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-22 01:31:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-22 01:31:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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) [2024-11-22 01:31:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-11-22 01:31:47,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-11-22 01:31:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:47,234 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-11-22 01:31:47,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-11-22 01:31:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-11-22 01:31:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-22 01:31:47,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,235 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 01:31:47,235 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:47,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2024-11-22 01:31:47,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:47,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356097228] [2024-11-22 01:31:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:31:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356097228] [2024-11-22 01:31:47,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356097228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:47,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:47,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:31:47,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643496603] [2024-11-22 01:31:47,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:47,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:31:47,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:31:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:31:47,348 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-11-22 01:31:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:47,393 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-11-22 01:31:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:31:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2024-11-22 01:31:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:47,395 INFO L225 Difference]: With dead ends: 36 [2024-11-22 01:31:47,395 INFO L226 Difference]: Without dead ends: 34 [2024-11-22 01:31:47,395 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 [2024-11-22 01:31:47,396 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:47,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-22 01:31:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2024-11-22 01:31:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-11-22 01:31:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-11-22 01:31:47,409 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-11-22 01:31:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:47,410 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-11-22 01:31:47,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-11-22 01:31:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-11-22 01:31:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 01:31:47,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,410 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 01:31:47,411 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:47,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2024-11-22 01:31:47,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:47,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498287414] [2024-11-22 01:31:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:31:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498287414] [2024-11-22 01:31:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498287414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:47,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:47,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 01:31:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615324979] [2024-11-22 01:31:47,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:47,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 01:31:47,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 01:31:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 01:31:47,491 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-22 01:31:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:47,513 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-11-22 01:31:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 01:31:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-11-22 01:31:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:47,514 INFO L225 Difference]: With dead ends: 42 [2024-11-22 01:31:47,514 INFO L226 Difference]: Without dead ends: 28 [2024-11-22 01:31:47,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 01:31:47,516 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:47,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-22 01:31:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-22 01:31:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2024-11-22 01:31:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-22 01:31:47,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-11-22 01:31:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:47,528 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-22 01:31:47,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-22 01:31:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-22 01:31:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 01:31:47,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,528 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 01:31:47,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:47,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2024-11-22 01:31:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:47,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198232088] [2024-11-22 01:31:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 01:31:47,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:47,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198232088] [2024-11-22 01:31:47,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198232088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:47,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:47,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:31:47,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998579296] [2024-11-22 01:31:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:47,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:31:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:31:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:31:47,659 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-22 01:31:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:47,700 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-22 01:31:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:31:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2024-11-22 01:31:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:47,701 INFO L225 Difference]: With dead ends: 42 [2024-11-22 01:31:47,701 INFO L226 Difference]: Without dead ends: 40 [2024-11-22 01:31:47,701 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 [2024-11-22 01:31:47,702 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:47,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-22 01:31:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-11-22 01:31:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-11-22 01:31:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-11-22 01:31:47,715 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2024-11-22 01:31:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:47,715 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-11-22 01:31:47,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-22 01:31:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-11-22 01:31:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-22 01:31:47,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,716 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 01:31:47,720 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:47,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2024-11-22 01:31:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:47,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175913630] [2024-11-22 01:31:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:31:47,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987387176] [2024-11-22 01:31:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:47,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:47,735 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) [2024-11-22 01:31:47,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 01:31:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:47,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 01:31:47,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 01:31:47,862 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 01:31:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175913630] [2024-11-22 01:31:47,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:31:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987387176] [2024-11-22 01:31:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987387176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:31:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876352184] [2024-11-22 01:31:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:47,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:31:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:31:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:31:47,866 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-22 01:31:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:47,928 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2024-11-22 01:31:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:31:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2024-11-22 01:31:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:47,929 INFO L225 Difference]: With dead ends: 61 [2024-11-22 01:31:47,929 INFO L226 Difference]: Without dead ends: 46 [2024-11-22 01:31:47,930 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 [2024-11-22 01:31:47,930 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:47,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-22 01:31:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-22 01:31:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 01:31:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2024-11-22 01:31:47,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2024-11-22 01:31:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:47,939 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2024-11-22 01:31:47,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-22 01:31:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2024-11-22 01:31:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-22 01:31:47,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:47,940 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:47,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 01:31:48,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:48,141 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:48,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2024-11-22 01:31:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023639463] [2024-11-22 01:31:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:48,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:31:48,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690259343] [2024-11-22 01:31:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:48,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:48,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:48,171 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) [2024-11-22 01:31:48,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 01:31:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:48,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 01:31:48,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 01:31:48,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 01:31:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023639463] [2024-11-22 01:31:48,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:31:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690259343] [2024-11-22 01:31:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690259343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:48,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:31:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-22 01:31:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354478280] [2024-11-22 01:31:48,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:48,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:31:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:31:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:31:48,515 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-22 01:31:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:48,604 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-11-22 01:31:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 01:31:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 [2024-11-22 01:31:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:48,605 INFO L225 Difference]: With dead ends: 60 [2024-11-22 01:31:48,605 INFO L226 Difference]: Without dead ends: 57 [2024-11-22 01:31:48,605 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 [2024-11-22 01:31:48,606 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:48,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:31:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-22 01:31:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-22 01:31:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 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) [2024-11-22 01:31:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2024-11-22 01:31:48,625 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 26 [2024-11-22 01:31:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:48,625 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2024-11-22 01:31:48,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2024-11-22 01:31:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2024-11-22 01:31:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-22 01:31:48,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:48,627 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:48,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 01:31:48,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 01:31:48,828 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:48,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2024-11-22 01:31:48,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:48,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18618515] [2024-11-22 01:31:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:31:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18618515] [2024-11-22 01:31:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18618515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:31:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185802915] [2024-11-22 01:31:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:48,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:48,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:48,939 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) [2024-11-22 01:31:48,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 01:31:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:48,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 01:31:48,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 01:31:49,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 01:31:49,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185802915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:49,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:31:49,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-22 01:31:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042716300] [2024-11-22 01:31:49,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:49,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 01:31:49,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 01:31:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-22 01:31:49,098 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-22 01:31:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:49,227 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2024-11-22 01:31:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 01:31:49,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 33 [2024-11-22 01:31:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:49,230 INFO L225 Difference]: With dead ends: 155 [2024-11-22 01:31:49,230 INFO L226 Difference]: Without dead ends: 130 [2024-11-22 01:31:49,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-22 01:31:49,231 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:49,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:31:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-22 01:31:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-11-22 01:31:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 83 states have internal predecessors, (95), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-22 01:31:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2024-11-22 01:31:49,248 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2024-11-22 01:31:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:49,248 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2024-11-22 01:31:49,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-22 01:31:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2024-11-22 01:31:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-22 01:31:49,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:49,249 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:49,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 01:31:49,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:49,450 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:49,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2024-11-22 01:31:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:49,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131676252] [2024-11-22 01:31:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:31:49,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570700935] [2024-11-22 01:31:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:49,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:49,465 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) [2024-11-22 01:31:49,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 01:31:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:49,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 01:31:49,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-22 01:31:49,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-22 01:31:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131676252] [2024-11-22 01:31:49,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:31:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570700935] [2024-11-22 01:31:49,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570700935] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 01:31:49,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:31:49,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-22 01:31:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314955907] [2024-11-22 01:31:49,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:49,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:31:49,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:31:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-22 01:31:49,645 INFO L87 Difference]: Start difference. First operand 123 states and 146 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, (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) [2024-11-22 01:31:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:50,503 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2024-11-22 01:31:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:31:50,504 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, (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 [2024-11-22 01:31:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:50,505 INFO L225 Difference]: With dead ends: 146 [2024-11-22 01:31:50,505 INFO L226 Difference]: Without dead ends: 140 [2024-11-22 01:31:50,506 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 [2024-11-22 01:31:50,506 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:50,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-22 01:31:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-22 01:31:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2024-11-22 01:31:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-22 01:31:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2024-11-22 01:31:50,524 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 36 [2024-11-22 01:31:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:50,525 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2024-11-22 01:31:50,525 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, (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) [2024-11-22 01:31:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2024-11-22 01:31:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-22 01:31:50,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:50,526 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] [2024-11-22 01:31:50,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 01:31:50,726 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 [2024-11-22 01:31:50,727 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:50,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1776130969, now seen corresponding path program 1 times [2024-11-22 01:31:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37743807] [2024-11-22 01:31:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-22 01:31:50,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:50,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37743807] [2024-11-22 01:31:50,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37743807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 01:31:50,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 01:31:50,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 01:31:50,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061421432] [2024-11-22 01:31:50,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 01:31:50,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 01:31:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 01:31:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 01:31:50,829 INFO L87 Difference]: Start difference. First operand 132 states and 155 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) [2024-11-22 01:31:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:50,897 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2024-11-22 01:31:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 01:31:50,897 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 [2024-11-22 01:31:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:50,899 INFO L225 Difference]: With dead ends: 137 [2024-11-22 01:31:50,901 INFO L226 Difference]: Without dead ends: 118 [2024-11-22 01:31:50,902 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 [2024-11-22 01:31:50,902 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:50,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 01:31:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-22 01:31:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-22 01:31:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-22 01:31:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2024-11-22 01:31:50,923 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2024-11-22 01:31:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:50,925 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2024-11-22 01:31:50,925 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) [2024-11-22 01:31:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2024-11-22 01:31:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 01:31:50,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:50,928 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:50,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 01:31:50,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:50,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2024-11-22 01:31:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051934713] [2024-11-22 01:31:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-22 01:31:51,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:51,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051934713] [2024-11-22 01:31:51,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051934713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:31:51,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205584264] [2024-11-22 01:31:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:51,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:51,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:51,043 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) [2024-11-22 01:31:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 01:31:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:51,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 01:31:51,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-22 01:31:51,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-22 01:31:51,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205584264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:31:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-22 01:31:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936093261] [2024-11-22 01:31:51,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:51,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 01:31:51,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 01:31:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-22 01:31:51,178 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-22 01:31:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:51,302 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2024-11-22 01:31:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 01:31:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 49 [2024-11-22 01:31:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:51,304 INFO L225 Difference]: With dead ends: 241 [2024-11-22 01:31:51,304 INFO L226 Difference]: Without dead ends: 220 [2024-11-22 01:31:51,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:31:51,305 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:51,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 184 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:31:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-22 01:31:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2024-11-22 01:31:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-22 01:31:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2024-11-22 01:31:51,335 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2024-11-22 01:31:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:51,336 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2024-11-22 01:31:51,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-22 01:31:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2024-11-22 01:31:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 01:31:51,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:51,338 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:51,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 01:31:51,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 01:31:51,540 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:51,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2024-11-22 01:31:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:51,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451764825] [2024-11-22 01:31:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:51,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:31:51,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376749047] [2024-11-22 01:31:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:51,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:51,562 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) [2024-11-22 01:31:51,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 01:31:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:51,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 01:31:51,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-22 01:31:51,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-22 01:31:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451764825] [2024-11-22 01:31:52,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:31:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376749047] [2024-11-22 01:31:52,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376749047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:52,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:31:52,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-22 01:31:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790125911] [2024-11-22 01:31:52,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:52,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 01:31:52,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 01:31:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:31:52,644 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2024-11-22 01:31:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:53,148 INFO L93 Difference]: Finished difference Result 359 states and 460 transitions. [2024-11-22 01:31:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 01:31:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 58 [2024-11-22 01:31:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:53,151 INFO L225 Difference]: With dead ends: 359 [2024-11-22 01:31:53,151 INFO L226 Difference]: Without dead ends: 298 [2024-11-22 01:31:53,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-22 01:31:53,155 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:53,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 288 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:31:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-22 01:31:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 272. [2024-11-22 01:31:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 185 states have (on average 1.227027027027027) internal successors, (227), 192 states have internal predecessors, (227), 57 states have call successors, (57), 29 states have call predecessors, (57), 29 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-22 01:31:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 339 transitions. [2024-11-22 01:31:53,228 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 339 transitions. Word has length 58 [2024-11-22 01:31:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:53,228 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 339 transitions. [2024-11-22 01:31:53,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2024-11-22 01:31:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 339 transitions. [2024-11-22 01:31:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-22 01:31:53,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:53,230 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:53,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 01:31:53,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:53,430 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:53,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2024-11-22 01:31:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:53,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677370499] [2024-11-22 01:31:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 01:31:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749410417] [2024-11-22 01:31:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:53,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:53,461 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) [2024-11-22 01:31:53,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 01:31:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:53,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 01:31:53,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-22 01:31:53,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-22 01:31:54,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:54,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677370499] [2024-11-22 01:31:54,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:31:54,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749410417] [2024-11-22 01:31:54,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749410417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:54,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:31:54,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-11-22 01:31:54,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212897318] [2024-11-22 01:31:54,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:54,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 01:31:54,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 01:31:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-22 01:31:54,166 INFO L87 Difference]: Start difference. First operand 272 states and 339 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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) [2024-11-22 01:31:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:54,548 INFO L93 Difference]: Finished difference Result 337 states and 420 transitions. [2024-11-22 01:31:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 01:31:54,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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 69 [2024-11-22 01:31:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:54,550 INFO L225 Difference]: With dead ends: 337 [2024-11-22 01:31:54,550 INFO L226 Difference]: Without dead ends: 269 [2024-11-22 01:31:54,550 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-22 01:31:54,551 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:54,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 275 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:31:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-22 01:31:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 243. [2024-11-22 01:31:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 166 states have (on average 1.180722891566265) internal successors, (196), 171 states have internal predecessors, (196), 47 states have call successors, (47), 30 states have call predecessors, (47), 29 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-22 01:31:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2024-11-22 01:31:54,588 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 69 [2024-11-22 01:31:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:54,588 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2024-11-22 01:31:54,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 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) [2024-11-22 01:31:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2024-11-22 01:31:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-22 01:31:54,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:54,589 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:31:54,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 01:31:54,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:54,794 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:54,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:54,794 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2024-11-22 01:31:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:54,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437633437] [2024-11-22 01:31:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:31:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:31:55,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437633437] [2024-11-22 01:31:55,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437633437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:31:55,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787742704] [2024-11-22 01:31:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:31:55,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:55,014 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) [2024-11-22 01:31:55,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 01:31:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:31:55,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 01:31:55,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:31:55,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:31:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-22 01:31:55,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787742704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:31:55,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:31:55,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-22 01:31:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277544232] [2024-11-22 01:31:55,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:31:55,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 01:31:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:31:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 01:31:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 01:31:55,498 INFO L87 Difference]: Start difference. First operand 243 states and 288 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 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) [2024-11-22 01:31:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:31:55,700 INFO L93 Difference]: Finished difference Result 281 states and 329 transitions. [2024-11-22 01:31:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 01:31:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 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 74 [2024-11-22 01:31:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:31:55,702 INFO L225 Difference]: With dead ends: 281 [2024-11-22 01:31:55,702 INFO L226 Difference]: Without dead ends: 215 [2024-11-22 01:31:55,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-22 01:31:55,703 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:31:55,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 334 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:31:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-22 01:31:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2024-11-22 01:31:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-22 01:31:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2024-11-22 01:31:55,741 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2024-11-22 01:31:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:31:55,741 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2024-11-22 01:31:55,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 12 states have internal predecessors, (51), 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) [2024-11-22 01:31:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2024-11-22 01:31:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-22 01:31:55,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:31:55,742 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-22 01:31:55,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 01:31:55,943 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,SelfDestructingSolverStorable12 [2024-11-22 01:31:55,944 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:31:55,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:31:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2024-11-22 01:31:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:31:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355638318] [2024-11-22 01:31:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:31:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:31:55,982 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:31:55,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:31:55,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017257920] [2024-11-22 01:31:55,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:31:55,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:31:55,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:31:55,985 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) [2024-11-22 01:31:55,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 01:31:56,036 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:31:56,036 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:31:56,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-22 01:31:56,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:31:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-22 01:31:56,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-22 01:32:10,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355638318] [2024-11-22 01:32:10,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:32:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017257920] [2024-11-22 01:32:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017257920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:32:10,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:32:10,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-22 01:32:10,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777669547] [2024-11-22 01:32:10,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:10,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 01:32:10,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 01:32:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-22 01:32:10,960 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-22 01:32:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:19,172 INFO L93 Difference]: Finished difference Result 319 states and 404 transitions. [2024-11-22 01:32:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 01:32:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 90 [2024-11-22 01:32:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:19,178 INFO L225 Difference]: With dead ends: 319 [2024-11-22 01:32:19,178 INFO L226 Difference]: Without dead ends: 283 [2024-11-22 01:32:19,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-11-22 01:32:19,179 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 77 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:19,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 579 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-22 01:32:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-22 01:32:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 245. [2024-11-22 01:32:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 167 states have (on average 1.1736526946107784) internal successors, (196), 171 states have internal predecessors, (196), 49 states have call successors, (49), 28 states have call predecessors, (49), 28 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-22 01:32:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 293 transitions. [2024-11-22 01:32:19,254 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 293 transitions. Word has length 90 [2024-11-22 01:32:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:19,254 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 293 transitions. [2024-11-22 01:32:19,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-22 01:32:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 293 transitions. [2024-11-22 01:32:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-22 01:32:19,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:19,255 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-22 01:32:19,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 01:32:19,455 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,SelfDestructingSolverStorable13 [2024-11-22 01:32:19,456 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:19,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1147408146, now seen corresponding path program 3 times [2024-11-22 01:32:19,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229229498] [2024-11-22 01:32:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:32:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:19,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-22 01:32:19,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:32:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602922964] [2024-11-22 01:32:19,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 01:32:19,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:19,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:19,506 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) [2024-11-22 01:32:19,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 01:32:19,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 01:32:19,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:32:19,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 01:32:19,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-22 01:32:19,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229229498] [2024-11-22 01:32:20,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:32:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602922964] [2024-11-22 01:32:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602922964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:32:20,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 01:32:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-22 01:32:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465315291] [2024-11-22 01:32:20,438 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:20,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 01:32:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 01:32:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-22 01:32:20,439 INFO L87 Difference]: Start difference. First operand 245 states and 293 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-22 01:32:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:20,602 INFO L93 Difference]: Finished difference Result 268 states and 314 transitions. [2024-11-22 01:32:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 01:32:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 95 [2024-11-22 01:32:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:20,604 INFO L225 Difference]: With dead ends: 268 [2024-11-22 01:32:20,605 INFO L226 Difference]: Without dead ends: 266 [2024-11-22 01:32:20,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-22 01:32:20,605 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:20,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:32:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-22 01:32:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 261. [2024-11-22 01:32:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 183 states have internal predecessors, (208), 49 states have call successors, (49), 32 states have call predecessors, (49), 32 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-22 01:32:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 305 transitions. [2024-11-22 01:32:20,669 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 305 transitions. Word has length 95 [2024-11-22 01:32:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:20,670 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 305 transitions. [2024-11-22 01:32:20,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-22 01:32:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 305 transitions. [2024-11-22 01:32:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-22 01:32:20,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:20,672 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:32:20,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 01:32:20,872 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,SelfDestructingSolverStorable14 [2024-11-22 01:32:20,873 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:20,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2024-11-22 01:32:20,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:20,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211352804] [2024-11-22 01:32:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:32:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:32:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-22 01:32:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211352804] [2024-11-22 01:32:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211352804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:32:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493460898] [2024-11-22 01:32:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:32:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:21,013 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) [2024-11-22 01:32:21,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 01:32:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:32:21,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 01:32:21,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-22 01:32:21,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-22 01:32:21,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493460898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:32:21,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:32:21,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-22 01:32:21,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479987770] [2024-11-22 01:32:21,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:21,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 01:32:21,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 01:32:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-11-22 01:32:21,246 INFO L87 Difference]: Start difference. First operand 261 states and 305 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-22 01:32:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:21,584 INFO L93 Difference]: Finished difference Result 720 states and 884 transitions. [2024-11-22 01:32:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 01:32:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 96 [2024-11-22 01:32:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:21,590 INFO L225 Difference]: With dead ends: 720 [2024-11-22 01:32:21,590 INFO L226 Difference]: Without dead ends: 650 [2024-11-22 01:32:21,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-11-22 01:32:21,591 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:21,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 189 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 01:32:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2024-11-22 01:32:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 562. [2024-11-22 01:32:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 376 states have (on average 1.2074468085106382) internal successors, (454), 394 states have internal predecessors, (454), 116 states have call successors, (116), 69 states have call predecessors, (116), 69 states have return successors, (112), 98 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-22 01:32:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 682 transitions. [2024-11-22 01:32:21,737 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 682 transitions. Word has length 96 [2024-11-22 01:32:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:21,741 INFO L471 AbstractCegarLoop]: Abstraction has 562 states and 682 transitions. [2024-11-22 01:32:21,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-22 01:32:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 682 transitions. [2024-11-22 01:32:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-22 01:32:21,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:21,742 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:32:21,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 01:32:21,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 01:32:21,943 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:21,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2024-11-22 01:32:21,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:21,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322794963] [2024-11-22 01:32:21,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:32:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:21,994 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:32:21,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:32:21,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143409530] [2024-11-22 01:32:21,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:32:21,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:22,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:32:22,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 01:32:22,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:32:22,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:32:22,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-22 01:32:22,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-22 01:32:22,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-22 01:32:25,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:25,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322794963] [2024-11-22 01:32:25,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 01:32:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143409530] [2024-11-22 01:32:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143409530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:32:25,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 01:32:25,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-22 01:32:25,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742345693] [2024-11-22 01:32:25,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:25,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 01:32:25,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 01:32:25,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:32:25,072 INFO L87 Difference]: Start difference. First operand 562 states and 682 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-22 01:32:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:28,611 INFO L93 Difference]: Finished difference Result 710 states and 871 transitions. [2024-11-22 01:32:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 01:32:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 101 [2024-11-22 01:32:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:28,615 INFO L225 Difference]: With dead ends: 710 [2024-11-22 01:32:28,615 INFO L226 Difference]: Without dead ends: 625 [2024-11-22 01:32:28,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2024-11-22 01:32:28,617 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 111 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:28,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 576 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-22 01:32:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2024-11-22 01:32:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 554. [2024-11-22 01:32:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 372 states have (on average 1.1935483870967742) internal successors, (444), 387 states have internal predecessors, (444), 111 states have call successors, (111), 71 states have call predecessors, (111), 70 states have return successors, (107), 95 states have call predecessors, (107), 107 states have call successors, (107) [2024-11-22 01:32:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 662 transitions. [2024-11-22 01:32:28,833 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 662 transitions. Word has length 101 [2024-11-22 01:32:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:28,833 INFO L471 AbstractCegarLoop]: Abstraction has 554 states and 662 transitions. [2024-11-22 01:32:28,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-11-22 01:32:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 662 transitions. [2024-11-22 01:32:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-22 01:32:28,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:28,836 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:32:28,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 01:32:29,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 01:32:29,038 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:29,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2024-11-22 01:32:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:29,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728564801] [2024-11-22 01:32:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:32:29,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:32:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-22 01:32:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728564801] [2024-11-22 01:32:29,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728564801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:32:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701370882] [2024-11-22 01:32:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 01:32:29,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:29,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:29,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:32:29,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 01:32:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 01:32:29,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 01:32:29,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-22 01:32:29,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-22 01:32:29,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701370882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:32:29,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:32:29,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 20 [2024-11-22 01:32:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709320871] [2024-11-22 01:32:29,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:29,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 01:32:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 01:32:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=224, Unknown=0, NotChecked=0, Total=380 [2024-11-22 01:32:29,680 INFO L87 Difference]: Start difference. First operand 554 states and 662 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-11-22 01:32:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:30,431 INFO L93 Difference]: Finished difference Result 1072 states and 1321 transitions. [2024-11-22 01:32:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 01:32:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 104 [2024-11-22 01:32:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:30,436 INFO L225 Difference]: With dead ends: 1072 [2024-11-22 01:32:30,436 INFO L226 Difference]: Without dead ends: 1037 [2024-11-22 01:32:30,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2024-11-22 01:32:30,437 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 259 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:30,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 237 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:32:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2024-11-22 01:32:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2024-11-22 01:32:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 689 states have (on average 1.1640058055152396) internal successors, (802), 715 states have internal predecessors, (802), 209 states have call successors, (209), 122 states have call predecessors, (209), 121 states have return successors, (200), 182 states have call predecessors, (200), 200 states have call successors, (200) [2024-11-22 01:32:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1211 transitions. [2024-11-22 01:32:30,769 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1211 transitions. Word has length 104 [2024-11-22 01:32:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:30,769 INFO L471 AbstractCegarLoop]: Abstraction has 1020 states and 1211 transitions. [2024-11-22 01:32:30,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 13 states have call successors, (46), 8 states have call predecessors, (46), 7 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2024-11-22 01:32:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1211 transitions. [2024-11-22 01:32:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-22 01:32:30,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:30,770 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 01:32:30,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 01:32:30,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 01:32:30,975 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:30,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2024-11-22 01:32:30,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372122645] [2024-11-22 01:32:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:32:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:30,996 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:32:30,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:32:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-22 01:32:31,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 01:32:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372122645] [2024-11-22 01:32:31,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372122645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 01:32:31,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484825773] [2024-11-22 01:32:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 01:32:31,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:31,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:32:31,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 01:32:31,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 01:32:31,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:32:31,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-22 01:32:31,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-22 01:32:31,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:32:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-22 01:32:32,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484825773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 01:32:32,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 01:32:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 10] total 24 [2024-11-22 01:32:32,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148458773] [2024-11-22 01:32:32,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 01:32:32,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 01:32:32,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 01:32:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 01:32:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-11-22 01:32:32,497 INFO L87 Difference]: Start difference. First operand 1020 states and 1211 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-11-22 01:32:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 01:32:33,314 INFO L93 Difference]: Finished difference Result 1352 states and 1628 transitions. [2024-11-22 01:32:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 01:32:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 106 [2024-11-22 01:32:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 01:32:33,321 INFO L225 Difference]: With dead ends: 1352 [2024-11-22 01:32:33,321 INFO L226 Difference]: Without dead ends: 912 [2024-11-22 01:32:33,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2024-11-22 01:32:33,322 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 01:32:33,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 444 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 01:32:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2024-11-22 01:32:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 805. [2024-11-22 01:32:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 544 states have (on average 1.1360294117647058) internal successors, (618), 570 states have internal predecessors, (618), 165 states have call successors, (165), 95 states have call predecessors, (165), 95 states have return successors, (156), 139 states have call predecessors, (156), 156 states have call successors, (156) [2024-11-22 01:32:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 939 transitions. [2024-11-22 01:32:33,578 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 939 transitions. Word has length 106 [2024-11-22 01:32:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 01:32:33,579 INFO L471 AbstractCegarLoop]: Abstraction has 805 states and 939 transitions. [2024-11-22 01:32:33,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-11-22 01:32:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 939 transitions. [2024-11-22 01:32:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-22 01:32:33,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 01:32:33,581 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-22 01:32:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 01:32:33,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:33,786 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 01:32:33,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 01:32:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash 969385619, now seen corresponding path program 4 times [2024-11-22 01:32:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 01:32:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118449565] [2024-11-22 01:32:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:32:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 01:32:33,819 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:32:33,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 01:32:33,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655736246] [2024-11-22 01:32:33,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 01:32:33,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 01:32:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 01:32:33,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 01:32:33,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 01:32:33,883 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 01:32:33,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 01:32:33,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-22 01:32:33,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 01:32:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 154 proven. 115 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2024-11-22 01:32:46,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 01:33:01,541 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)