./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/loops-crafted-1/Mono4_1.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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:54:00,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:54:00,316 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:54:00,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:54:00,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:54:00,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:54:00,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:54:00,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:54:00,344 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:54:00,344 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:54:00,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:54:00,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:54:00,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:54:00,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:54:00,345 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:54:00,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:54:00,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:54:00,346 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:54:00,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:54:00,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:54:00,347 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:54:00,347 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:00,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:54:00,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:54:00,348 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 -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2025-03-16 17:54:00,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:54:00,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:54:00,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:54:00,623 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:54:00,623 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:54:00,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2025-03-16 17:54:01,814 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e7808a16/36f4454a896c4d80b2e3a6b5b854c06d/FLAG5040b0e1d [2025-03-16 17:54:02,020 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:54:02,021 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2025-03-16 17:54:02,035 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e7808a16/36f4454a896c4d80b2e3a6b5b854c06d/FLAG5040b0e1d [2025-03-16 17:54:02,373 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e7808a16/36f4454a896c4d80b2e3a6b5b854c06d [2025-03-16 17:54:02,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:54:02,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:54:02,376 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:02,376 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:54:02,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:54:02,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c0890d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02, skipping insertion in model container [2025-03-16 17:54:02,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:54:02,484 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/loops-crafted-1/Mono4_1.c[311,324] [2025-03-16 17:54:02,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:02,500 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:54:02,509 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/loops-crafted-1/Mono4_1.c[311,324] [2025-03-16 17:54:02,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:54:02,522 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:54:02,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02 WrapperNode [2025-03-16 17:54:02,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:54:02,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:02,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:54:02,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:54:02,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,544 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-03-16 17:54:02,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:54:02,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:54:02,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:54:02,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:54:02,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,552 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,559 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]. [2025-03-16 17:54:02,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,564 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,564 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,565 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:54:02,567 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:54:02,568 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:54:02,568 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:54:02,569 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (1/1) ... [2025-03-16 17:54:02,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:54:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:02,592 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) [2025-03-16 17:54:02,597 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 [2025-03-16 17:54:02,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:54:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:54:02,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:54:02,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:54:02,646 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:54:02,647 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:54:02,719 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 17:54:02,719 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:54:02,725 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:54:02,726 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:54:02,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:02 BoogieIcfgContainer [2025-03-16 17:54:02,726 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:54:02,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:54:02,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:54:02,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:54:02,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:54:02" (1/3) ... [2025-03-16 17:54:02,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7426e0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:02, skipping insertion in model container [2025-03-16 17:54:02,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:54:02" (2/3) ... [2025-03-16 17:54:02,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7426e0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:54:02, skipping insertion in model container [2025-03-16 17:54:02,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:54:02" (3/3) ... [2025-03-16 17:54:02,734 INFO L128 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2025-03-16 17:54:02,744 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:54:02,746 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Mono4_1.c that has 1 procedures, 9 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-16 17:54:02,787 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:54:02,798 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;@1665faa7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:54:02,798 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:54:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-16 17:54:02,805 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:02,806 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-16 17:54:02,806 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:02,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:02,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1196540, now seen corresponding path program 1 times [2025-03-16 17:54:02,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642361755] [2025-03-16 17:54:02,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:02,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-16 17:54:02,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-16 17:54:02,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:02,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642361755] [2025-03-16 17:54:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642361755] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:54:02,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:54:02,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 17:54:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512470957] [2025-03-16 17:54:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:54:02,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:54:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:02,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:54:02,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:02,945 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:02,963 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2025-03-16 17:54:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:54:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-03-16 17:54:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:02,968 INFO L225 Difference]: With dead ends: 19 [2025-03-16 17:54:02,968 INFO L226 Difference]: Without dead ends: 8 [2025-03-16 17:54:02,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:54:02,971 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:02,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2025-03-16 17:54:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2025-03-16 17:54:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2025-03-16 17:54:02,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 4 [2025-03-16 17:54:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:02,990 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2025-03-16 17:54:02,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2025-03-16 17:54:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 17:54:02,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:02,991 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 17:54:02,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:54:02,991 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:02,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1152737854, now seen corresponding path program 1 times [2025-03-16 17:54:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587462534] [2025-03-16 17:54:02,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:02,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 17:54:03,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 17:54:03,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:03,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:03,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587462534] [2025-03-16 17:54:03,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587462534] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848002226] [2025-03-16 17:54:03,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:03,059 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) [2025-03-16 17:54:03,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:54:03,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 17:54:03,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 17:54:03,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:03,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 17:54:03,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:03,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:54:03,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848002226] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-16 17:54:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019842544] [2025-03-16 17:54:03,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:03,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 17:54:03,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:03,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 17:54:03,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:54:03,157 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:03,180 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2025-03-16 17:54:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 17:54:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-16 17:54:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:03,181 INFO L225 Difference]: With dead ends: 18 [2025-03-16 17:54:03,181 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 17:54:03,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:54:03,182 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:03,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 17:54:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 17:54:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-03-16 17:54:03,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2025-03-16 17:54:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:03,185 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-03-16 17:54:03,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-03-16 17:54:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 17:54:03,185 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:03,185 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1] [2025-03-16 17:54:03,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:03,386 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 [2025-03-16 17:54:03,386 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:03,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1503812866, now seen corresponding path program 1 times [2025-03-16 17:54:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952256561] [2025-03-16 17:54:03,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:03,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 17:54:03,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 17:54:03,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:03,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:03,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952256561] [2025-03-16 17:54:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952256561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953224650] [2025-03-16 17:54:03,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:54:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:03,467 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) [2025-03-16 17:54:03,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:54:03,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 17:54:03,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 17:54:03,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:03,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 17:54:03,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:03,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:03,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953224650] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:03,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:03,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-03-16 17:54:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295294140] [2025-03-16 17:54:03,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:03,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 17:54:03,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:03,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 17:54:03,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:54:03,567 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:03,598 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2025-03-16 17:54:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:54:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 17:54:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:03,599 INFO L225 Difference]: With dead ends: 29 [2025-03-16 17:54:03,599 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 17:54:03,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:54:03,600 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:03,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 17:54:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-16 17:54:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-03-16 17:54:03,605 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2025-03-16 17:54:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:03,605 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-03-16 17:54:03,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-03-16 17:54:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-16 17:54:03,606 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:03,606 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1] [2025-03-16 17:54:03,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:03,806 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,SelfDestructingSolverStorable2 [2025-03-16 17:54:03,807 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:03,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -353197302, now seen corresponding path program 2 times [2025-03-16 17:54:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:03,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222471720] [2025-03-16 17:54:03,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:03,813 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-16 17:54:03,823 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 17:54:03,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:03,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-16 17:54:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222471720] [2025-03-16 17:54:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222471720] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135986322] [2025-03-16 17:54:03,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:03,954 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) [2025-03-16 17:54:03,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:54:03,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-16 17:54:03,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 17:54:03,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:03,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:03,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:54:03,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:04,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:54:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135986322] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:04,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2025-03-16 17:54:04,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127930136] [2025-03-16 17:54:04,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:04,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:54:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:04,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:54:04,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:54:04,194 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:04,385 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2025-03-16 17:54:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 17:54:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-16 17:54:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:04,386 INFO L225 Difference]: With dead ends: 55 [2025-03-16 17:54:04,386 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 17:54:04,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:54:04,388 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:04,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 17:54:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2025-03-16 17:54:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2025-03-16 17:54:04,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 20 [2025-03-16 17:54:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:04,392 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2025-03-16 17:54:04,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2025-03-16 17:54:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 17:54:04,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:04,393 INFO L218 NwaCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1] [2025-03-16 17:54:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:04,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:04,598 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:04,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 934698043, now seen corresponding path program 3 times [2025-03-16 17:54:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:04,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886680604] [2025-03-16 17:54:04,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:04,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 18 equivalence classes. [2025-03-16 17:54:04,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 38 statements. [2025-03-16 17:54:04,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 17:54:04,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-03-16 17:54:04,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886680604] [2025-03-16 17:54:04,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886680604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:04,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31845476] [2025-03-16 17:54:04,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:04,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:04,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:04,698 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) [2025-03-16 17:54:04,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:54:04,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 18 equivalence classes. [2025-03-16 17:54:04,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 38 statements. [2025-03-16 17:54:04,725 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 17:54:04,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:04,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 17:54:04,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-03-16 17:54:04,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2025-03-16 17:54:04,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31845476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:04,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:04,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-16 17:54:04,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223927295] [2025-03-16 17:54:04,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:04,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 17:54:04,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:04,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 17:54:04,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2025-03-16 17:54:04,905 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:05,014 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2025-03-16 17:54:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 17:54:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 17:54:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:05,016 INFO L225 Difference]: With dead ends: 73 [2025-03-16 17:54:05,016 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 17:54:05,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:54:05,017 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:05,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:05,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 17:54:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2025-03-16 17:54:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2025-03-16 17:54:05,023 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 38 [2025-03-16 17:54:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:05,024 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2025-03-16 17:54:05,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2025-03-16 17:54:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 17:54:05,026 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:05,026 INFO L218 NwaCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1] [2025-03-16 17:54:05,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 17:54:05,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:05,226 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:05,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1337587232, now seen corresponding path program 4 times [2025-03-16 17:54:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:05,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249535437] [2025-03-16 17:54:05,227 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:05,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:05,234 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-16 17:54:05,243 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 17:54:05,244 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:05,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 17:54:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249535437] [2025-03-16 17:54:05,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249535437] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637547296] [2025-03-16 17:54:05,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:05,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:05,433 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) [2025-03-16 17:54:05,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:54:05,456 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 48 statements into 2 equivalence classes. [2025-03-16 17:54:05,471 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 17:54:05,471 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:05,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:05,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 17:54:05,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 17:54:05,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 225 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 17:54:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637547296] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:05,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:05,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2025-03-16 17:54:05,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139892573] [2025-03-16 17:54:05,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:05,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:54:05,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:05,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:54:05,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:54:05,843 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:05,925 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2025-03-16 17:54:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 17:54:05,925 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2025-03-16 17:54:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:05,926 INFO L225 Difference]: With dead ends: 99 [2025-03-16 17:54:05,926 INFO L226 Difference]: Without dead ends: 81 [2025-03-16 17:54:05,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:54:05,927 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:05,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-16 17:54:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-16 17:54:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2025-03-16 17:54:05,938 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 48 [2025-03-16 17:54:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:05,939 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2025-03-16 17:54:05,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2025-03-16 17:54:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-16 17:54:05,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:05,941 INFO L218 NwaCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1] [2025-03-16 17:54:05,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:06,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:06,141 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:06,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash -734900672, now seen corresponding path program 5 times [2025-03-16 17:54:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:06,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637629724] [2025-03-16 17:54:06,142 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:06,148 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 80 statements into 39 equivalence classes. [2025-03-16 17:54:06,162 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 80 of 80 statements. [2025-03-16 17:54:06,162 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-03-16 17:54:06,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2025-03-16 17:54:06,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637629724] [2025-03-16 17:54:06,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637629724] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040758676] [2025-03-16 17:54:06,289 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:54:06,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:06,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:06,291 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) [2025-03-16 17:54:06,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:54:06,318 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 80 statements into 39 equivalence classes. [2025-03-16 17:54:06,354 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) and asserted 80 of 80 statements. [2025-03-16 17:54:06,355 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2025-03-16 17:54:06,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:06,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 17:54:06,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 17:54:06,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-16 17:54:07,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040758676] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:07,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:07,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 32, 32] total 73 [2025-03-16 17:54:07,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968906567] [2025-03-16 17:54:07,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:07,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-16 17:54:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:07,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-16 17:54:07,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2025-03-16 17:54:07,855 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:08,036 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2025-03-16 17:54:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-03-16 17:54:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2025-03-16 17:54:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:08,039 INFO L225 Difference]: With dead ends: 226 [2025-03-16 17:54:08,039 INFO L226 Difference]: Without dead ends: 208 [2025-03-16 17:54:08,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2025-03-16 17:54:08,045 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:08,045 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2025-03-16 17:54:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 147. [2025-03-16 17:54:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0684931506849316) internal successors, (156), 146 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2025-03-16 17:54:08,079 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 80 [2025-03-16 17:54:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:08,079 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2025-03-16 17:54:08,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 73 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2025-03-16 17:54:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-16 17:54:08,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:08,080 INFO L218 NwaCegarLoop]: trace histogram [71, 62, 9, 1, 1, 1, 1] [2025-03-16 17:54:08,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 17:54:08,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:08,281 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:08,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash -709885407, now seen corresponding path program 6 times [2025-03-16 17:54:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:08,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344406551] [2025-03-16 17:54:08,281 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:54:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:08,287 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 72 equivalence classes. [2025-03-16 17:54:08,307 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 72 of 146 statements. [2025-03-16 17:54:08,307 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-03-16 17:54:08,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-03-16 17:54:08,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344406551] [2025-03-16 17:54:08,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344406551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:08,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345747527] [2025-03-16 17:54:08,468 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:54:08,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:08,471 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) [2025-03-16 17:54:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 17:54:08,498 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 72 equivalence classes. [2025-03-16 17:54:08,527 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) and asserted 72 of 146 statements. [2025-03-16 17:54:08,527 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2025-03-16 17:54:08,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:08,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 17:54:08,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-03-16 17:54:08,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2025-03-16 17:54:08,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345747527] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:08,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:08,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 17:54:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631547408] [2025-03-16 17:54:08,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:08,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 17:54:08,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:08,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 17:54:08,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:54:08,943 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:09,038 INFO L93 Difference]: Finished difference Result 449 states and 612 transitions. [2025-03-16 17:54:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 17:54:09,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2025-03-16 17:54:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:09,040 INFO L225 Difference]: With dead ends: 449 [2025-03-16 17:54:09,040 INFO L226 Difference]: Without dead ends: 446 [2025-03-16 17:54:09,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:54:09,041 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:09,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:54:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2025-03-16 17:54:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 169. [2025-03-16 17:54:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.125) internal successors, (189), 168 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2025-03-16 17:54:09,059 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 146 [2025-03-16 17:54:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:09,059 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2025-03-16 17:54:09,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2025-03-16 17:54:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2025-03-16 17:54:09,060 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:09,060 INFO L218 NwaCegarLoop]: trace histogram [82, 62, 20, 1, 1, 1, 1] [2025-03-16 17:54:09,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 17:54:09,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:09,261 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:09,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1402236532, now seen corresponding path program 7 times [2025-03-16 17:54:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:09,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963559805] [2025-03-16 17:54:09,261 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:54:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:09,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 168 statements into 1 equivalence classes. [2025-03-16 17:54:09,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 17:54:09,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:09,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963559805] [2025-03-16 17:54:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963559805] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980934182] [2025-03-16 17:54:11,227 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:54:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:11,229 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) [2025-03-16 17:54:11,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 17:54:11,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 168 statements into 1 equivalence classes. [2025-03-16 17:54:11,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 17:54:11,285 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:54:11,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:11,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-16 17:54:11,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:11,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 3906 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:14,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980934182] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:14,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 128 [2025-03-16 17:54:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826845354] [2025-03-16 17:54:14,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:14,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2025-03-16 17:54:14,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:14,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2025-03-16 17:54:14,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-03-16 17:54:14,528 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:14,821 INFO L93 Difference]: Finished difference Result 339 states and 442 transitions. [2025-03-16 17:54:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2025-03-16 17:54:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2025-03-16 17:54:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:14,824 INFO L225 Difference]: With dead ends: 339 [2025-03-16 17:54:14,824 INFO L226 Difference]: Without dead ends: 297 [2025-03-16 17:54:14,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-03-16 17:54:14,827 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:14,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:54:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2025-03-16 17:54:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2025-03-16 17:54:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.070945945945946) internal successors, (317), 296 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 317 transitions. [2025-03-16 17:54:14,855 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 317 transitions. Word has length 168 [2025-03-16 17:54:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:14,855 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 317 transitions. [2025-03-16 17:54:14,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 317 transitions. [2025-03-16 17:54:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2025-03-16 17:54:14,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:14,862 INFO L218 NwaCegarLoop]: trace histogram [146, 126, 20, 1, 1, 1, 1] [2025-03-16 17:54:14,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 17:54:15,062 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,SelfDestructingSolverStorable8 [2025-03-16 17:54:15,063 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:15,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -537234932, now seen corresponding path program 8 times [2025-03-16 17:54:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784701823] [2025-03-16 17:54:15,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:15,072 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 296 statements into 2 equivalence classes. [2025-03-16 17:54:15,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 296 of 296 statements. [2025-03-16 17:54:15,119 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:15,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:20,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784701823] [2025-03-16 17:54:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784701823] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492455852] [2025-03-16 17:54:20,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:54:20,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:20,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:20,963 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) [2025-03-16 17:54:20,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 17:54:20,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 296 statements into 2 equivalence classes. [2025-03-16 17:54:21,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 296 of 296 statements. [2025-03-16 17:54:21,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:54:21,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:21,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-03-16 17:54:21,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:21,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21316 backedges. 4953 proven. 16002 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2025-03-16 17:54:33,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492455852] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:33,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:33,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 256 [2025-03-16 17:54:33,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564114716] [2025-03-16 17:54:33,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:33,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2025-03-16 17:54:33,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:33,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2025-03-16 17:54:33,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2025-03-16 17:54:33,437 INFO L87 Difference]: Start difference. First operand 297 states and 317 transitions. Second operand has 257 states, 257 states have (on average 2.0155642023346303) internal successors, (518), 256 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:34,537 INFO L93 Difference]: Finished difference Result 595 states and 762 transitions. [2025-03-16 17:54:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2025-03-16 17:54:34,538 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 2.0155642023346303) internal successors, (518), 256 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2025-03-16 17:54:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:34,540 INFO L225 Difference]: With dead ends: 595 [2025-03-16 17:54:34,540 INFO L226 Difference]: Without dead ends: 553 [2025-03-16 17:54:34,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2025-03-16 17:54:34,544 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:34,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 17:54:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2025-03-16 17:54:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2025-03-16 17:54:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.0380434782608696) internal successors, (573), 552 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 573 transitions. [2025-03-16 17:54:34,589 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 573 transitions. Word has length 296 [2025-03-16 17:54:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:34,590 INFO L471 AbstractCegarLoop]: Abstraction has 553 states and 573 transitions. [2025-03-16 17:54:34,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 2.0155642023346303) internal successors, (518), 256 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 573 transitions. [2025-03-16 17:54:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2025-03-16 17:54:34,595 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:34,595 INFO L218 NwaCegarLoop]: trace histogram [274, 254, 20, 1, 1, 1, 1] [2025-03-16 17:54:34,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 17:54:34,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 17:54:34,796 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:34,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -75484404, now seen corresponding path program 9 times [2025-03-16 17:54:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:34,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764069996] [2025-03-16 17:54:34,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:34,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 552 statements into 275 equivalence classes. [2025-03-16 17:54:34,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) and asserted 82 of 552 statements. [2025-03-16 17:54:34,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2025-03-16 17:54:34,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-03-16 17:54:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:54:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764069996] [2025-03-16 17:54:35,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764069996] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:54:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274690579] [2025-03-16 17:54:35,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:54:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:54:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:54:35,071 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) [2025-03-16 17:54:35,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 17:54:35,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 552 statements into 275 equivalence classes. [2025-03-16 17:54:35,142 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) and asserted 82 of 552 statements. [2025-03-16 17:54:35,142 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2025-03-16 17:54:35,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:54:35,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 17:54:35,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:54:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-03-16 17:54:35,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:54:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 75076 backedges. 0 proven. 10306 refuted. 0 times theorem prover too weak. 64770 trivial. 0 not checked. [2025-03-16 17:54:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274690579] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:54:36,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:54:36,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2025-03-16 17:54:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486963811] [2025-03-16 17:54:36,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:54:36,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-16 17:54:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:54:36,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-16 17:54:36,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=1188, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 17:54:36,357 INFO L87 Difference]: Start difference. First operand 553 states and 573 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:54:37,020 INFO L93 Difference]: Finished difference Result 1064 states and 1348 transitions. [2025-03-16 17:54:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-03-16 17:54:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 552 [2025-03-16 17:54:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:54:37,024 INFO L225 Difference]: With dead ends: 1064 [2025-03-16 17:54:37,024 INFO L226 Difference]: Without dead ends: 1061 [2025-03-16 17:54:37,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1919, Invalid=2637, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:54:37,025 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 127 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:54:37,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 104 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:54:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2025-03-16 17:54:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 597. [2025-03-16 17:54:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.0721476510067114) internal successors, (639), 596 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 639 transitions. [2025-03-16 17:54:37,082 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 639 transitions. Word has length 552 [2025-03-16 17:54:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:54:37,083 INFO L471 AbstractCegarLoop]: Abstraction has 597 states and 639 transitions. [2025-03-16 17:54:37,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:54:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 639 transitions. [2025-03-16 17:54:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2025-03-16 17:54:37,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:54:37,090 INFO L218 NwaCegarLoop]: trace histogram [296, 254, 42, 1, 1, 1, 1] [2025-03-16 17:54:37,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 17:54:37,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 17:54:37,294 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:54:37,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:54:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1880599330, now seen corresponding path program 10 times [2025-03-16 17:54:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:54:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847999663] [2025-03-16 17:54:37,295 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:54:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:54:37,307 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 596 statements into 2 equivalence classes. [2025-03-16 17:54:37,470 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 596 of 596 statements. [2025-03-16 17:54:37,470 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:54:37,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 87616 backedges. 21165 proven. 64770 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2025-03-16 17:55:01,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:55:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847999663] [2025-03-16 17:55:01,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847999663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:55:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108733106] [2025-03-16 17:55:01,606 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:55:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:55:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:55:01,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:55:01,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 17:55:01,645 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 596 statements into 2 equivalence classes. [2025-03-16 17:55:01,738 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 596 of 596 statements. [2025-03-16 17:55:01,738 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:55:01,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:55:01,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 256 conjuncts are in the unsatisfiable core [2025-03-16 17:55:01,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:55:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 87616 backedges. 21165 proven. 64770 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2025-03-16 17:55:02,170 INFO L312 TraceCheckSpWp]: Computing backward predicates...