./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/prod4br-ll_unwindbound100.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 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:07:21,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:07:21,634 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:07:21,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:07:21,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:07:21,660 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:07:21,661 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:07:21,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:07:21,661 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:07:21,661 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:07:21,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:07:21,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:07:21,662 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:07:21,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:07:21,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:07:21,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:07:21,664 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:07:21,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:07:21,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:07:21,665 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 [2025-03-03 14:07:21,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:07:21,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:07:21,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:07:21,897 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:07:21,897 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:07:21,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2025-03-03 14:07:23,034 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508ea7d86/1d160f3715e74b0b951c286a3f7350f0/FLAG2278ae572 [2025-03-03 14:07:23,249 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:07:23,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2025-03-03 14:07:23,255 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508ea7d86/1d160f3715e74b0b951c286a3f7350f0/FLAG2278ae572 [2025-03-03 14:07:23,266 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508ea7d86/1d160f3715e74b0b951c286a3f7350f0 [2025-03-03 14:07:23,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:07:23,268 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:07:23,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:07:23,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:07:23,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:07:23,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c78adea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23, skipping insertion in model container [2025-03-03 14:07:23,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,283 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:07:23,386 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/prod4br-ll_unwindbound100.c[524,537] [2025-03-03 14:07:23,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:07:23,409 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:07:23,417 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/prod4br-ll_unwindbound100.c[524,537] [2025-03-03 14:07:23,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:07:23,436 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:07:23,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23 WrapperNode [2025-03-03 14:07:23,437 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:07:23,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:07:23,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:07:23,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:07:23,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,459 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2025-03-03 14:07:23,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:07:23,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:07:23,461 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:07:23,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:07:23,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,472 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,482 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:07:23,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,485 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,489 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:07:23,491 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:07:23,491 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:07:23,491 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:07:23,495 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (1/1) ... [2025-03-03 14:07:23,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:07:23,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:23,521 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) [2025-03-03 14:07:23,524 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 [2025-03-03 14:07:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:07:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:07:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:07:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:07:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 14:07:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 14:07:23,587 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:07:23,589 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:07:23,721 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 14:07:23,721 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:07:23,728 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:07:23,728 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:07:23,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:07:23 BoogieIcfgContainer [2025-03-03 14:07:23,728 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:07:23,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:07:23,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:07:23,733 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:07:23,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:07:23" (1/3) ... [2025-03-03 14:07:23,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4330652a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:07:23, skipping insertion in model container [2025-03-03 14:07:23,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:07:23" (2/3) ... [2025-03-03 14:07:23,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4330652a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:07:23, skipping insertion in model container [2025-03-03 14:07:23,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:07:23" (3/3) ... [2025-03-03 14:07:23,735 INFO L128 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2025-03-03 14:07:23,745 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:07:23,747 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prod4br-ll_unwindbound100.c that has 2 procedures, 23 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-03 14:07:23,780 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:07:23,787 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;@37bfb8ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:07:23,788 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:07:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:07:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-03 14:07:23,794 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:23,794 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:23,795 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:23,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1148179021, now seen corresponding path program 1 times [2025-03-03 14:07:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519188584] [2025-03-03 14:07:23,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:23,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-03 14:07:23,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-03 14:07:23,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:23,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:23,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519188584] [2025-03-03 14:07:23,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519188584] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:23,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:07:23,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 14:07:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760005683] [2025-03-03 14:07:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:23,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 14:07:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:23,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 14:07:23,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 14:07:23,918 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 14:07:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:23,937 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2025-03-03 14:07:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 14:07:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-03 14:07:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:23,945 INFO L225 Difference]: With dead ends: 43 [2025-03-03 14:07:23,946 INFO L226 Difference]: Without dead ends: 19 [2025-03-03 14:07:23,949 INFO L434 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 [2025-03-03 14:07:23,951 INFO L435 NwaCegarLoop]: 29 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, 29 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 [2025-03-03 14:07:23,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-03 14:07:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-03 14:07:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-03-03 14:07:23,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2025-03-03 14:07:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:23,983 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-03-03 14:07:23,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 14:07:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-03-03 14:07:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:07:23,984 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:23,984 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:23,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:07:23,984 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:23,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1363417483, now seen corresponding path program 1 times [2025-03-03 14:07:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737240259] [2025-03-03 14:07:23,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:23,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:07:24,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:07:24,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:24,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:24,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778146643] [2025-03-03 14:07:24,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:24,012 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) [2025-03-03 14:07:24,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:07:24,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:07:24,056 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:07:24,056 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:24,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:24,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:07:24,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:24,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 14:07:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737240259] [2025-03-03 14:07:24,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:24,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778146643] [2025-03-03 14:07:24,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778146643] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:24,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:07:24,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-03 14:07:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508947951] [2025-03-03 14:07:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:24,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 14:07:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:24,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 14:07:24,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-03 14:07:24,252 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2025-03-03 14:07:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:24,356 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2025-03-03 14:07:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 14:07:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 [2025-03-03 14:07:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:24,357 INFO L225 Difference]: With dead ends: 34 [2025-03-03 14:07:24,358 INFO L226 Difference]: Without dead ends: 32 [2025-03-03 14:07:24,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 14:07:24,359 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:24,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:07:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-03 14:07:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2025-03-03 14:07:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:07:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2025-03-03 14:07:24,368 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2025-03-03 14:07:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:24,368 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2025-03-03 14:07:24,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2025-03-03 14:07:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2025-03-03 14:07:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:07:24,369 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:24,370 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:24,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:07:24,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:24,570 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:24,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1362553544, now seen corresponding path program 1 times [2025-03-03 14:07:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:24,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249335355] [2025-03-03 14:07:24,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:24,577 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:07:24,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:07:24,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:24,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:24,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249335355] [2025-03-03 14:07:24,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249335355] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:24,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:07:24,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 14:07:24,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299535519] [2025-03-03 14:07:24,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:24,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 14:07:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:24,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 14:07:24,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 14:07:24,644 INFO L87 Difference]: Start difference. First operand 26 states and 33 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) [2025-03-03 14:07:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:24,659 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2025-03-03 14:07:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 14:07:24,660 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 [2025-03-03 14:07:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:24,661 INFO L225 Difference]: With dead ends: 34 [2025-03-03 14:07:24,661 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 14:07:24,661 INFO L434 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 [2025-03-03 14:07:24,662 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:24,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:24,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 14:07:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-03 14:07:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:07:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2025-03-03 14:07:24,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2025-03-03 14:07:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:24,666 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2025-03-03 14:07:24,666 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) [2025-03-03 14:07:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2025-03-03 14:07:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 14:07:24,666 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:24,666 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:24,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 14:07:24,666 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:24,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -187814629, now seen corresponding path program 1 times [2025-03-03 14:07:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:24,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961399041] [2025-03-03 14:07:24,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:24,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 14:07:24,678 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 14:07:24,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:24,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085066924] [2025-03-03 14:07:24,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:24,682 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) [2025-03-03 14:07:24,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:07:24,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 14:07:24,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 14:07:24,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:24,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:24,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 14:07:24,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:24,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961399041] [2025-03-03 14:07:25,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085066924] [2025-03-03 14:07:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085066924] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:25,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:07:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2025-03-03 14:07:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054419301] [2025-03-03 14:07:25,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:25,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:07:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:25,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:07:25,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:07:25,071 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:25,283 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2025-03-03 14:07:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:07:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2025-03-03 14:07:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:25,284 INFO L225 Difference]: With dead ends: 47 [2025-03-03 14:07:25,284 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 14:07:25,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:07:25,285 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:25,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 110 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:07:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 14:07:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2025-03-03 14:07:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 14:07:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-03 14:07:25,292 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2025-03-03 14:07:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:25,292 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-03 14:07:25,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-03 14:07:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 14:07:25,293 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:25,293 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:25,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:07:25,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:07:25,494 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:25,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash 57485371, now seen corresponding path program 1 times [2025-03-03 14:07:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610548210] [2025-03-03 14:07:25,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:25,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 14:07:25,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 14:07:25,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:25,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691038950] [2025-03-03 14:07:25,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:25,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:25,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:25,529 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) [2025-03-03 14:07:25,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:07:25,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 14:07:25,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 14:07:25,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:25,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:25,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 14:07:25,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:25,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:26,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610548210] [2025-03-03 14:07:26,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691038950] [2025-03-03 14:07:26,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691038950] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:26,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 14:07:26,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2025-03-03 14:07:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733298876] [2025-03-03 14:07:26,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:26,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 14:07:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:26,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 14:07:26,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:07:26,606 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:27,163 INFO L93 Difference]: Finished difference Result 61 states and 86 transitions. [2025-03-03 14:07:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:07:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-03-03 14:07:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:27,165 INFO L225 Difference]: With dead ends: 61 [2025-03-03 14:07:27,166 INFO L226 Difference]: Without dead ends: 59 [2025-03-03 14:07:27,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:07:27,167 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:27,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 106 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:07:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-03 14:07:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2025-03-03 14:07:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 14:07:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-03-03 14:07:27,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2025-03-03 14:07:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:27,179 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-03-03 14:07:27,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-03-03 14:07:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 14:07:27,181 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:27,181 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:27,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:27,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:27,383 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:27,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 58349310, now seen corresponding path program 1 times [2025-03-03 14:07:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:27,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576355653] [2025-03-03 14:07:27,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:27,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 14:07:27,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 14:07:27,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:27,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576355653] [2025-03-03 14:07:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576355653] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835109294] [2025-03-03 14:07:27,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:27,489 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) [2025-03-03 14:07:27,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:07:27,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 14:07:27,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 14:07:27,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:27,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:27,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 14:07:27,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:27,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:27,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835109294] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:27,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:07:27,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2025-03-03 14:07:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612561706] [2025-03-03 14:07:27,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:27,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:07:27,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:27,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:07:27,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:07:27,582 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:07:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:27,681 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2025-03-03 14:07:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:07:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2025-03-03 14:07:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:27,683 INFO L225 Difference]: With dead ends: 107 [2025-03-03 14:07:27,683 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 14:07:27,683 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:07:27,684 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:27,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 14:07:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2025-03-03 14:07:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 14:07:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2025-03-03 14:07:27,703 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2025-03-03 14:07:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:27,703 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2025-03-03 14:07:27,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:07:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2025-03-03 14:07:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-03 14:07:27,703 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:27,703 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:27,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 14:07:27,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:27,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:27,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 296845472, now seen corresponding path program 1 times [2025-03-03 14:07:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007748185] [2025-03-03 14:07:27,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:27,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-03 14:07:27,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 14:07:27,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:27,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 14:07:27,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636746568] [2025-03-03 14:07:27,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:07:27,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:27,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:27,920 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) [2025-03-03 14:07:27,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:07:27,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-03 14:07:27,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-03 14:07:27,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:07:27,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:27,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 14:07:27,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:07:27,971 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 14:07:27,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007748185] [2025-03-03 14:07:27,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 14:07:27,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636746568] [2025-03-03 14:07:27,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636746568] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:07:27,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:07:27,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:07:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490528469] [2025-03-03 14:07:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:07:27,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:07:27,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:27,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:07:27,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:07:27,973 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:28,017 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2025-03-03 14:07:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:07:28,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-03-03 14:07:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:28,018 INFO L225 Difference]: With dead ends: 78 [2025-03-03 14:07:28,018 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 14:07:28,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 14:07:28,018 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 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 [2025-03-03 14:07:28,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:07:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 14:07:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-03 14:07:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:07:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-03-03 14:07:28,028 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 21 [2025-03-03 14:07:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:28,029 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-03-03 14:07:28,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 14:07:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-03-03 14:07:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 14:07:28,030 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:28,030 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:28,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:28,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:28,230 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:28,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -726392136, now seen corresponding path program 2 times [2025-03-03 14:07:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:28,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008873610] [2025-03-03 14:07:28,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:07:28,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:28,236 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-03 14:07:28,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 14:07:28,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:07:28,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 14:07:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008873610] [2025-03-03 14:07:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008873610] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712830896] [2025-03-03 14:07:28,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:07:28,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:28,540 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) [2025-03-03 14:07:28,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:07:28,564 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-03 14:07:28,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 14:07:28,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:07:28,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:28,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 14:07:28,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:28,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 14:07:28,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712830896] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:28,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:07:28,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 17 [2025-03-03 14:07:28,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442773934] [2025-03-03 14:07:28,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:28,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:07:28,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:28,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:07:28,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:07:28,742 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:07:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:28,905 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2025-03-03 14:07:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:07:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 46 [2025-03-03 14:07:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:28,907 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:07:28,907 INFO L226 Difference]: Without dead ends: 124 [2025-03-03 14:07:28,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:07:28,908 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:28,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 198 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:07:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-03 14:07:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2025-03-03 14:07:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 101 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-03 14:07:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2025-03-03 14:07:28,935 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2025-03-03 14:07:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:28,936 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2025-03-03 14:07:28,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:07:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2025-03-03 14:07:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-03 14:07:28,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:28,938 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:28,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:29,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:29,139 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:29,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1276358920, now seen corresponding path program 3 times [2025-03-03 14:07:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:29,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467484996] [2025-03-03 14:07:29,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:07:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:29,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 11 equivalence classes. [2025-03-03 14:07:29,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 14:07:29,315 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 14:07:29,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 14:07:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467484996] [2025-03-03 14:07:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467484996] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617622197] [2025-03-03 14:07:30,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:07:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:30,045 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) [2025-03-03 14:07:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:07:30,078 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 11 equivalence classes. [2025-03-03 14:07:30,208 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 100 of 100 statements. [2025-03-03 14:07:30,208 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 14:07:30,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:30,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 14:07:30,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:30,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 14:07:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617622197] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:30,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:07:30,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 14] total 35 [2025-03-03 14:07:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632479988] [2025-03-03 14:07:30,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:30,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 14:07:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:30,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 14:07:30,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=699, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:07:30,640 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 35 states have internal predecessors, (148), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2025-03-03 14:07:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:31,050 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2025-03-03 14:07:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-03 14:07:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 35 states have internal predecessors, (148), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) Word has length 100 [2025-03-03 14:07:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:31,052 INFO L225 Difference]: With dead ends: 264 [2025-03-03 14:07:31,052 INFO L226 Difference]: Without dead ends: 256 [2025-03-03 14:07:31,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=857, Invalid=1495, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 14:07:31,054 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 406 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:31,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 332 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:07:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-03-03 14:07:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2025-03-03 14:07:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 209 states have internal predecessors, (276), 24 states have call successors, (24), 23 states have call predecessors, (24), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-03 14:07:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 323 transitions. [2025-03-03 14:07:31,089 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 323 transitions. Word has length 100 [2025-03-03 14:07:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:31,089 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 323 transitions. [2025-03-03 14:07:31,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 35 states have internal predecessors, (148), 21 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2025-03-03 14:07:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 323 transitions. [2025-03-03 14:07:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2025-03-03 14:07:31,092 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:31,092 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:31,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:31,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:31,293 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:31,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1429575544, now seen corresponding path program 4 times [2025-03-03 14:07:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:31,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796295983] [2025-03-03 14:07:31,293 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:07:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:31,305 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 208 statements into 2 equivalence classes. [2025-03-03 14:07:31,680 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 208 of 208 statements. [2025-03-03 14:07:31,681 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:07:31,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2025-03-03 14:07:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796295983] [2025-03-03 14:07:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796295983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111917212] [2025-03-03 14:07:33,100 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:07:33,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:33,102 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) [2025-03-03 14:07:33,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:07:33,144 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 208 statements into 2 equivalence classes. [2025-03-03 14:07:33,274 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 208 of 208 statements. [2025-03-03 14:07:33,274 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:07:33,274 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:33,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 14:07:33,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:33,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2025-03-03 14:07:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111917212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:34,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:07:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 26] total 52 [2025-03-03 14:07:34,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617428938] [2025-03-03 14:07:34,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:34,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-03 14:07:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:34,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-03 14:07:34,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 14:07:34,199 INFO L87 Difference]: Start difference. First operand 256 states and 323 transitions. Second operand has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2025-03-03 14:07:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:35,296 INFO L93 Difference]: Finished difference Result 528 states and 691 transitions. [2025-03-03 14:07:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-03-03 14:07:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) Word has length 208 [2025-03-03 14:07:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:35,300 INFO L225 Difference]: With dead ends: 528 [2025-03-03 14:07:35,300 INFO L226 Difference]: Without dead ends: 520 [2025-03-03 14:07:35,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3364, Invalid=5756, Unknown=0, NotChecked=0, Total=9120 [2025-03-03 14:07:35,303 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 1114 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:35,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 532 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:07:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2025-03-03 14:07:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2025-03-03 14:07:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 424 states have (on average 1.330188679245283) internal successors, (564), 425 states have internal predecessors, (564), 48 states have call successors, (48), 47 states have call predecessors, (48), 47 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-03 14:07:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 659 transitions. [2025-03-03 14:07:35,361 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 659 transitions. Word has length 208 [2025-03-03 14:07:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:35,362 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 659 transitions. [2025-03-03 14:07:35,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.115384615384615) internal successors, (266), 52 states have internal predecessors, (266), 45 states have call successors, (67), 24 states have call predecessors, (67), 23 states have return successors, (66), 44 states have call predecessors, (66), 44 states have call successors, (66) [2025-03-03 14:07:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 659 transitions. [2025-03-03 14:07:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2025-03-03 14:07:35,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:35,366 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:35,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:35,566 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,SelfDestructingSolverStorable9 [2025-03-03 14:07:35,566 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:35,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2015094904, now seen corresponding path program 5 times [2025-03-03 14:07:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908744898] [2025-03-03 14:07:35,567 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:07:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:35,583 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 424 statements into 47 equivalence classes. [2025-03-03 14:07:39,697 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 424 of 424 statements. [2025-03-03 14:07:39,697 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-03 14:07:39,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2025-03-03 14:07:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:07:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908744898] [2025-03-03 14:07:43,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908744898] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:07:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356848777] [2025-03-03 14:07:43,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:07:43,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:43,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:07:43,282 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) [2025-03-03 14:07:43,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:07:43,344 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 424 statements into 47 equivalence classes. [2025-03-03 14:07:44,817 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 424 of 424 statements. [2025-03-03 14:07:44,817 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-03 14:07:44,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:07:44,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-03-03 14:07:44,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:07:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:07:45,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:07:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2025-03-03 14:07:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356848777] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:07:47,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:07:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 50] total 99 [2025-03-03 14:07:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374555872] [2025-03-03 14:07:47,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:07:47,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2025-03-03 14:07:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:07:47,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2025-03-03 14:07:47,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=5044, Unknown=0, NotChecked=0, Total=9702 [2025-03-03 14:07:47,340 INFO L87 Difference]: Start difference. First operand 520 states and 659 transitions. Second operand has 99 states, 99 states have (on average 5.313131313131313) internal successors, (526), 99 states have internal predecessors, (526), 93 states have call successors, (139), 48 states have call predecessors, (139), 47 states have return successors, (138), 92 states have call predecessors, (138), 92 states have call successors, (138) [2025-03-03 14:07:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:07:52,633 INFO L93 Difference]: Finished difference Result 1056 states and 1387 transitions. [2025-03-03 14:07:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2025-03-03 14:07:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 5.313131313131313) internal successors, (526), 99 states have internal predecessors, (526), 93 states have call successors, (139), 48 states have call predecessors, (139), 47 states have return successors, (138), 92 states have call predecessors, (138), 92 states have call successors, (138) Word has length 424 [2025-03-03 14:07:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:07:52,639 INFO L225 Difference]: With dead ends: 1056 [2025-03-03 14:07:52,639 INFO L226 Difference]: Without dead ends: 1048 [2025-03-03 14:07:52,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5716 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2025-03-03 14:07:52,647 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 2296 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 14:07:52,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2296 Valid, 1026 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 14:07:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2025-03-03 14:07:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2025-03-03 14:07:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 856 states have (on average 1.3317757009345794) internal successors, (1140), 857 states have internal predecessors, (1140), 96 states have call successors, (96), 95 states have call predecessors, (96), 95 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2025-03-03 14:07:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1331 transitions. [2025-03-03 14:07:52,755 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1331 transitions. Word has length 424 [2025-03-03 14:07:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:07:52,755 INFO L471 AbstractCegarLoop]: Abstraction has 1048 states and 1331 transitions. [2025-03-03 14:07:52,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 5.313131313131313) internal successors, (526), 99 states have internal predecessors, (526), 93 states have call successors, (139), 48 states have call predecessors, (139), 47 states have return successors, (138), 92 states have call predecessors, (138), 92 states have call successors, (138) [2025-03-03 14:07:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1331 transitions. [2025-03-03 14:07:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2025-03-03 14:07:52,766 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:07:52,767 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:07:52,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:07:52,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:07:52,967 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:07:52,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:07:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 246909560, now seen corresponding path program 6 times [2025-03-03 14:07:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:07:52,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506395107] [2025-03-03 14:07:52,968 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:07:52,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:07:52,995 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 856 statements into 95 equivalence classes. [2025-03-03 14:07:58,452 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) and asserted 820 of 856 statements. [2025-03-03 14:07:58,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2025-03-03 14:07:58,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:08:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39715 backedges. 10905 proven. 1435 refuted. 0 times theorem prover too weak. 27375 trivial. 0 not checked. [2025-03-03 14:08:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:08:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506395107] [2025-03-03 14:08:29,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506395107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:08:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088272438] [2025-03-03 14:08:29,443 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:08:29,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:08:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:08:29,446 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) [2025-03-03 14:08:29,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:08:29,556 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 856 statements into 95 equivalence classes.