./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:51:15,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:51:15,597 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:51:15,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:51:15,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:51:15,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:51:15,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:51:15,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:51:15,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:51:15,628 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:51:15,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:51:15,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:51:15,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:51:15,629 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:51:15,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:51:15,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:51:15,631 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:51:15,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:51:15,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:51:15,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:51:15,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:51:15,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:51:15,633 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 -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2025-03-03 13:51:15,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:51:15,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:51:15,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:51:15,867 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:51:15,867 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:51:15,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-03-03 13:51:17,038 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58508502/149c9914bbe04d0789323781f516d4a9/FLAG789543883 [2025-03-03 13:51:17,236 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:51:17,238 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-03-03 13:51:17,246 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58508502/149c9914bbe04d0789323781f516d4a9/FLAG789543883 [2025-03-03 13:51:17,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a58508502/149c9914bbe04d0789323781f516d4a9 [2025-03-03 13:51:17,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:51:17,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:51:17,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:51:17,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:51:17,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:51:17,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d076140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17, skipping insertion in model container [2025-03-03 13:51:17,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:51:17,410 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2025-03-03 13:51:17,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:51:17,437 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:51:17,444 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2025-03-03 13:51:17,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:51:17,464 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:51:17,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17 WrapperNode [2025-03-03 13:51:17,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:51:17,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:51:17,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:51:17,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:51:17,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,494 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-03-03 13:51:17,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:51:17,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:51:17,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:51:17,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:51:17,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,504 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,520 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:51:17,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,525 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:51:17,528 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:51:17,528 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:51:17,528 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:51:17,530 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (1/1) ... [2025-03-03 13:51:17,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:51:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:17,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:51:17,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:51:17,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:51:17,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:51:17,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:51:17,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:51:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:51:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:51:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:51:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:51:17,608 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:51:17,609 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:51:17,727 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-03 13:51:17,727 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:51:17,733 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:51:17,733 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:51:17,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:51:17 BoogieIcfgContainer [2025-03-03 13:51:17,734 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:51:17,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:51:17,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:51:17,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:51:17,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:51:17" (1/3) ... [2025-03-03 13:51:17,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a68d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:51:17, skipping insertion in model container [2025-03-03 13:51:17,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:51:17" (2/3) ... [2025-03-03 13:51:17,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a68d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:51:17, skipping insertion in model container [2025-03-03 13:51:17,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:51:17" (3/3) ... [2025-03-03 13:51:17,740 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2025-03-03 13:51:17,750 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:51:17,751 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound20.c that has 3 procedures, 33 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:51:17,782 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:51:17,790 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;@4e6d5915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:51:17,791 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:51:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:51:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:51:17,798 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:17,798 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:17,798 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:17,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:17,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1369079279, now seen corresponding path program 1 times [2025-03-03 13:51:17,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:17,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813446530] [2025-03-03 13:51:17,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:17,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:17,855 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:17,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:17,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:17,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:51:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813446530] [2025-03-03 13:51:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813446530] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518673940] [2025-03-03 13:51:18,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:18,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:51:18,161 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:18,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:18,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:18,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:18,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 13:51:18,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:51:18,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518673940] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:18,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-03-03 13:51:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126348453] [2025-03-03 13:51:18,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:18,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:51:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:18,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:51:18,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:18,544 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-03 13:51:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:18,750 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2025-03-03 13:51:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:51:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2025-03-03 13:51:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:18,755 INFO L225 Difference]: With dead ends: 74 [2025-03-03 13:51:18,755 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 13:51:18,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:51:18,759 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:18,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 182 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 13:51:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2025-03-03 13:51:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:51:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2025-03-03 13:51:18,790 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 39 [2025-03-03 13:51:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:18,791 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2025-03-03 13:51:18,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-03 13:51:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2025-03-03 13:51:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:51:18,793 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:18,793 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:18,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:51:18,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:51:18,995 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:18,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1371164649, now seen corresponding path program 1 times [2025-03-03 13:51:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:18,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314484176] [2025-03-03 13:51:18,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:19,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:19,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:19,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915758643] [2025-03-03 13:51:19,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:19,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:19,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:19,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:19,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:51:19,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:51:19,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:51:19,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:19,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:51:19,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 13:51:19,084 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314484176] [2025-03-03 13:51:19,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915758643] [2025-03-03 13:51:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915758643] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:19,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:19,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610798395] [2025-03-03 13:51:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:19,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:19,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:19,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:19,086 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:51:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:19,132 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2025-03-03 13:51:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2025-03-03 13:51:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:19,133 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:51:19,133 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:51:19,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:19,134 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:19,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:51:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2025-03-03 13:51:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2025-03-03 13:51:19,147 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 39 [2025-03-03 13:51:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:19,148 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2025-03-03 13:51:19,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 13:51:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2025-03-03 13:51:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-03 13:51:19,150 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:19,150 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:19,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:19,350 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,SelfDestructingSolverStorable1 [2025-03-03 13:51:19,351 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:19,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1302690525, now seen corresponding path program 1 times [2025-03-03 13:51:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:19,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393328281] [2025-03-03 13:51:19,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:19,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:51:19,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:51:19,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912251842] [2025-03-03 13:51:19,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:19,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:19,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:19,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:19,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:51:19,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-03 13:51:19,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-03 13:51:19,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:19,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:51:19,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 13:51:19,470 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393328281] [2025-03-03 13:51:19,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912251842] [2025-03-03 13:51:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912251842] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:19,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:19,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209914347] [2025-03-03 13:51:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:19,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:19,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:19,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:19,472 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:51:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:19,502 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2025-03-03 13:51:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2025-03-03 13:51:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:19,504 INFO L225 Difference]: With dead ends: 52 [2025-03-03 13:51:19,504 INFO L226 Difference]: Without dead ends: 50 [2025-03-03 13:51:19,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:19,505 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:19,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-03 13:51:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2025-03-03 13:51:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2025-03-03 13:51:19,512 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 44 [2025-03-03 13:51:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:19,512 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2025-03-03 13:51:19,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:51:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2025-03-03 13:51:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-03 13:51:19,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:19,513 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:19,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:51:19,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:19,714 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:19,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 145105565, now seen corresponding path program 1 times [2025-03-03 13:51:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777811798] [2025-03-03 13:51:19,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:19,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-03 13:51:19,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:51:19,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918769907] [2025-03-03 13:51:19,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:19,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:19,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:51:19,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-03 13:51:19,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-03 13:51:19,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:19,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:19,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:51:19,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-03 13:51:19,894 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:51:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:19,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777811798] [2025-03-03 13:51:19,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:19,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918769907] [2025-03-03 13:51:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918769907] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:19,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:19,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:19,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126301664] [2025-03-03 13:51:19,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:19,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:19,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:19,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:19,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:19,896 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-03 13:51:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:19,940 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2025-03-03 13:51:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:51:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2025-03-03 13:51:19,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:19,941 INFO L225 Difference]: With dead ends: 56 [2025-03-03 13:51:19,942 INFO L226 Difference]: Without dead ends: 54 [2025-03-03 13:51:19,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:51:19,942 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:19,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-03 13:51:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2025-03-03 13:51:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:51:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2025-03-03 13:51:19,955 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 54 [2025-03-03 13:51:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:19,955 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2025-03-03 13:51:19,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-03 13:51:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2025-03-03 13:51:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-03 13:51:19,957 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:19,957 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:19,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 13:51:20,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:20,159 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:20,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash 63346894, now seen corresponding path program 1 times [2025-03-03 13:51:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:20,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264670910] [2025-03-03 13:51:20,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:20,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:51:20,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:51:20,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:20,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:20,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440836312] [2025-03-03 13:51:20,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:20,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:20,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:51:20,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-03 13:51:20,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-03 13:51:20,234 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:20,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:20,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:51:20,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:51:20,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 13:51:20,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:20,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264670910] [2025-03-03 13:51:20,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:20,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440836312] [2025-03-03 13:51:20,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440836312] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:20,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:20,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-03-03 13:51:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308613652] [2025-03-03 13:51:20,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:20,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:20,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:20,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:20,373 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:51:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:20,456 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:51:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:51:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2025-03-03 13:51:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:20,457 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:51:20,457 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:51:20,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:20,458 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:20,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 144 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:51:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2025-03-03 13:51:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:51:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2025-03-03 13:51:20,486 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 60 [2025-03-03 13:51:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:20,487 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2025-03-03 13:51:20,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2025-03-03 13:51:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2025-03-03 13:51:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 13:51:20,488 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:20,488 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:20,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:20,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:20,690 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:20,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1928783807, now seen corresponding path program 1 times [2025-03-03 13:51:20,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:20,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609075522] [2025-03-03 13:51:20,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:20,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:20,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 13:51:20,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 13:51:20,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:20,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609075522] [2025-03-03 13:51:20,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609075522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:20,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115878055] [2025-03-03 13:51:20,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:20,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:20,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:20,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:51:20,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 13:51:20,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 13:51:20,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:20,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:20,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:51:20,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:20,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 13:51:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115878055] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:21,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:51:21,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:51:21,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654117433] [2025-03-03 13:51:21,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:21,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:51:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:21,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:51:21,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:51:21,050 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:51:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:21,185 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2025-03-03 13:51:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:51:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 62 [2025-03-03 13:51:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:21,187 INFO L225 Difference]: With dead ends: 91 [2025-03-03 13:51:21,187 INFO L226 Difference]: Without dead ends: 83 [2025-03-03 13:51:21,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:21,192 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 25 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:21,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 239 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-03 13:51:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2025-03-03 13:51:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2025-03-03 13:51:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2025-03-03 13:51:21,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 62 [2025-03-03 13:51:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:21,210 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2025-03-03 13:51:21,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:51:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2025-03-03 13:51:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-03 13:51:21,211 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:21,211 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:21,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:51:21,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,415 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:21,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash 898806541, now seen corresponding path program 1 times [2025-03-03 13:51:21,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:21,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110155884] [2025-03-03 13:51:21,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:21,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:21,429 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-03 13:51:21,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:51:21,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:21,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:21,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000231733] [2025-03-03 13:51:21,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:21,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:21,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:51:21,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-03-03 13:51:21,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:51:21,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:21,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:21,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-03 13:51:21,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-03 13:51:21,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110155884] [2025-03-03 13:51:21,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:21,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000231733] [2025-03-03 13:51:21,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000231733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:21,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:21,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-03-03 13:51:21,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322039021] [2025-03-03 13:51:21,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:21,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:51:21,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:21,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:51:21,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:21,620 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:51:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:21,706 INFO L93 Difference]: Finished difference Result 105 states and 154 transitions. [2025-03-03 13:51:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:51:21,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2025-03-03 13:51:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:21,708 INFO L225 Difference]: With dead ends: 105 [2025-03-03 13:51:21,708 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:51:21,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:21,708 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:21,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:51:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2025-03-03 13:51:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2025-03-03 13:51:21,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 67 [2025-03-03 13:51:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:21,727 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2025-03-03 13:51:21,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-03 13:51:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2025-03-03 13:51:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 13:51:21,728 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:21,728 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:21,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:21,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,929 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:21,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:21,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1038374521, now seen corresponding path program 2 times [2025-03-03 13:51:21,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:21,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761768469] [2025-03-03 13:51:21,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:21,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:21,939 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 13:51:21,948 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 13:51:21,948 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:21,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213049459] [2025-03-03 13:51:21,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:21,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:21,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:21,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:51:21,977 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-03 13:51:21,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 13:51:21,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:21,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:21,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:51:21,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-03 13:51:22,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:22,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:22,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761768469] [2025-03-03 13:51:22,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213049459] [2025-03-03 13:51:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213049459] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:22,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:51:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980958763] [2025-03-03 13:51:22,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:22,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:22,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:22,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:51:22,189 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:51:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:22,308 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2025-03-03 13:51:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:51:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2025-03-03 13:51:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:22,311 INFO L225 Difference]: With dead ends: 111 [2025-03-03 13:51:22,311 INFO L226 Difference]: Without dead ends: 109 [2025-03-03 13:51:22,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:51:22,312 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:22,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 196 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-03 13:51:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2025-03-03 13:51:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 153 transitions. [2025-03-03 13:51:22,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 153 transitions. Word has length 72 [2025-03-03 13:51:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:22,340 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 153 transitions. [2025-03-03 13:51:22,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-03 13:51:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 153 transitions. [2025-03-03 13:51:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-03 13:51:22,343 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:22,344 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:22,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:22,544 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,SelfDestructingSolverStorable7 [2025-03-03 13:51:22,545 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:22,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1638998323, now seen corresponding path program 3 times [2025-03-03 13:51:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43343860] [2025-03-03 13:51:22,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:22,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:22,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-03-03 13:51:22,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 77 of 77 statements. [2025-03-03 13:51:22,579 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:51:22,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984348338] [2025-03-03 13:51:22,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:22,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:22,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:22,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:51:22,610 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 77 statements into 6 equivalence classes. [2025-03-03 13:51:22,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 46 of 77 statements. [2025-03-03 13:51:22,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:51:22,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:22,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:51:22,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-03 13:51:23,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:23,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:23,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43343860] [2025-03-03 13:51:23,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:23,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984348338] [2025-03-03 13:51:23,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984348338] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:23,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355533672] [2025-03-03 13:51:23,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:23,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:23,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:23,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:51:23,619 INFO L87 Difference]: Start difference. First operand 107 states and 153 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:51:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:23,971 INFO L93 Difference]: Finished difference Result 115 states and 160 transitions. [2025-03-03 13:51:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:51:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 77 [2025-03-03 13:51:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:23,974 INFO L225 Difference]: With dead ends: 115 [2025-03-03 13:51:23,974 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 13:51:23,974 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:51:23,974 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:23,975 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 228 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:51:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 13:51:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2025-03-03 13:51:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2025-03-03 13:51:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2025-03-03 13:51:23,993 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 77 [2025-03-03 13:51:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:23,994 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2025-03-03 13:51:23,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-03 13:51:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2025-03-03 13:51:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 13:51:23,994 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:23,995 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:24,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:24,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:24,199 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:24,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash 285109562, now seen corresponding path program 1 times [2025-03-03 13:51:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123554465] [2025-03-03 13:51:24,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:24,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-03 13:51:24,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 13:51:24,216 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:24,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:24,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193188272] [2025-03-03 13:51:24,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:24,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:24,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:24,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:51:24,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-03-03 13:51:24,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-03-03 13:51:24,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:24,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:24,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-03 13:51:24,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-03-03 13:51:24,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 13:51:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123554465] [2025-03-03 13:51:24,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193188272] [2025-03-03 13:51:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193188272] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:24,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:24,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-03 13:51:24,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501219073] [2025-03-03 13:51:24,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:24,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:51:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:24,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:51:24,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-03 13:51:24,902 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:26,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:26,283 INFO L93 Difference]: Finished difference Result 195 states and 303 transitions. [2025-03-03 13:51:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 13:51:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 83 [2025-03-03 13:51:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:26,287 INFO L225 Difference]: With dead ends: 195 [2025-03-03 13:51:26,287 INFO L226 Difference]: Without dead ends: 191 [2025-03-03 13:51:26,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:51:26,288 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:26,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 387 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:51:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-03 13:51:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2025-03-03 13:51:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 84 states have internal predecessors, (108), 94 states have call successors, (94), 12 states have call predecessors, (94), 12 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:51:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2025-03-03 13:51:26,327 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 83 [2025-03-03 13:51:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:26,327 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2025-03-03 13:51:26,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2025-03-03 13:51:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-03 13:51:26,328 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:26,328 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:26,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 13:51:26,529 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,SelfDestructingSolverStorable9 [2025-03-03 13:51:26,529 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:26,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1251034333, now seen corresponding path program 4 times [2025-03-03 13:51:26,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:26,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675024208] [2025-03-03 13:51:26,530 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:26,534 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-03-03 13:51:26,539 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 90 statements. [2025-03-03 13:51:26,539 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:26,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-03 13:51:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675024208] [2025-03-03 13:51:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675024208] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:51:26,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:51:26,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:51:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613825524] [2025-03-03 13:51:26,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:51:26,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:51:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:26,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:51:26,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:51:26,608 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:51:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:26,708 INFO L93 Difference]: Finished difference Result 233 states and 362 transitions. [2025-03-03 13:51:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:51:26,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 90 [2025-03-03 13:51:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:26,710 INFO L225 Difference]: With dead ends: 233 [2025-03-03 13:51:26,710 INFO L226 Difference]: Without dead ends: 171 [2025-03-03 13:51:26,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:26,711 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:26,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:51:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-03 13:51:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2025-03-03 13:51:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-03-03 13:51:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 242 transitions. [2025-03-03 13:51:26,753 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 242 transitions. Word has length 90 [2025-03-03 13:51:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:26,753 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 242 transitions. [2025-03-03 13:51:26,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-03 13:51:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 242 transitions. [2025-03-03 13:51:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 13:51:26,754 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:26,754 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:26,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-03 13:51:26,755 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:26,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2059555826, now seen corresponding path program 1 times [2025-03-03 13:51:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:26,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403833643] [2025-03-03 13:51:26,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:26,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:51:26,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:51:26,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:26,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:26,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093832170] [2025-03-03 13:51:26,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:26,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:26,777 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) [2025-03-03 13:51:26,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:51:26,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 13:51:26,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 13:51:26,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:26,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:26,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-03 13:51:26,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 13:51:27,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403833643] [2025-03-03 13:51:28,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093832170] [2025-03-03 13:51:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093832170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:28,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:28,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:51:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802546258] [2025-03-03 13:51:28,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:28,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:51:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:28,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:51:28,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:51:28,303 INFO L87 Difference]: Start difference. First operand 162 states and 242 transitions. Second operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:28,948 INFO L93 Difference]: Finished difference Result 174 states and 252 transitions. [2025-03-03 13:51:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:51:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2025-03-03 13:51:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:28,951 INFO L225 Difference]: With dead ends: 174 [2025-03-03 13:51:28,951 INFO L226 Difference]: Without dead ends: 172 [2025-03-03 13:51:28,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:51:28,952 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:28,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 220 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:51:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-03-03 13:51:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2025-03-03 13:51:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 80 states have internal predecessors, (94), 78 states have call successors, (78), 14 states have call predecessors, (78), 14 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2025-03-03 13:51:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 248 transitions. [2025-03-03 13:51:29,006 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 248 transitions. Word has length 98 [2025-03-03 13:51:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:29,007 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 248 transitions. [2025-03-03 13:51:29,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 248 transitions. [2025-03-03 13:51:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-03 13:51:29,008 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:29,009 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:29,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 13:51:29,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:51:29,209 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:29,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash 541940060, now seen corresponding path program 1 times [2025-03-03 13:51:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723639110] [2025-03-03 13:51:29,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:29,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:29,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-03 13:51:29,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:29,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:29,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-03-03 13:51:29,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723639110] [2025-03-03 13:51:29,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723639110] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655446722] [2025-03-03 13:51:29,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:51:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:29,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:29,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:51:29,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-03 13:51:29,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:29,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:29,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:29,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:51:29,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 84 proven. 7 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2025-03-03 13:51:29,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-03-03 13:51:29,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655446722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:29,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:51:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-03-03 13:51:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496200865] [2025-03-03 13:51:29,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:29,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:51:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:29,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:51:29,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:51:29,461 INFO L87 Difference]: Start difference. First operand 170 states and 248 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-03-03 13:51:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:29,634 INFO L93 Difference]: Finished difference Result 197 states and 287 transitions. [2025-03-03 13:51:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 13:51:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 111 [2025-03-03 13:51:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:29,636 INFO L225 Difference]: With dead ends: 197 [2025-03-03 13:51:29,636 INFO L226 Difference]: Without dead ends: 185 [2025-03-03 13:51:29,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:29,637 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:29,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-03 13:51:29,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2025-03-03 13:51:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 79 states have internal predecessors, (93), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2025-03-03 13:51:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 245 transitions. [2025-03-03 13:51:29,672 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 245 transitions. Word has length 111 [2025-03-03 13:51:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:29,672 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 245 transitions. [2025-03-03 13:51:29,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2025-03-03 13:51:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 245 transitions. [2025-03-03 13:51:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-03 13:51:29,673 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:29,673 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:29,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 13:51:29,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:51:29,874 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:29,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1418194270, now seen corresponding path program 2 times [2025-03-03 13:51:29,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:29,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523627420] [2025-03-03 13:51:29,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:29,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:29,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-03-03 13:51:29,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:29,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:29,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973793365] [2025-03-03 13:51:29,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:29,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:29,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:29,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:29,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:51:29,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-03-03 13:51:29,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-03-03 13:51:29,950 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:29,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:29,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-03 13:51:29,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2025-03-03 13:51:30,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-03 13:51:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523627420] [2025-03-03 13:51:30,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973793365] [2025-03-03 13:51:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973793365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:30,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-03 13:51:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351131860] [2025-03-03 13:51:30,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:30,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:51:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:30,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:51:30,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:51:30,442 INFO L87 Difference]: Start difference. First operand 169 states and 245 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:51:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:31,334 INFO L93 Difference]: Finished difference Result 195 states and 284 transitions. [2025-03-03 13:51:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:51:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 111 [2025-03-03 13:51:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:31,335 INFO L225 Difference]: With dead ends: 195 [2025-03-03 13:51:31,335 INFO L226 Difference]: Without dead ends: 192 [2025-03-03 13:51:31,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:51:31,336 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:31,338 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 309 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:51:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-03-03 13:51:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 171. [2025-03-03 13:51:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 80 states have (on average 1.2) internal successors, (96), 81 states have internal predecessors, (96), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2025-03-03 13:51:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 245 transitions. [2025-03-03 13:51:31,382 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 245 transitions. Word has length 111 [2025-03-03 13:51:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:31,382 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 245 transitions. [2025-03-03 13:51:31,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:51:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 245 transitions. [2025-03-03 13:51:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-03-03 13:51:31,383 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:31,383 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:31,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:31,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:51:31,584 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:31,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2070022489, now seen corresponding path program 3 times [2025-03-03 13:51:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308988073] [2025-03-03 13:51:31,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:31,589 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 10 equivalence classes. [2025-03-03 13:51:31,609 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 114 of 114 statements. [2025-03-03 13:51:31,609 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 13:51:31,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:31,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125326448] [2025-03-03 13:51:31,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:31,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:31,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:31,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:51:31,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 114 statements into 10 equivalence classes. [2025-03-03 13:51:31,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 67 of 114 statements. [2025-03-03 13:51:31,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:51:31,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:31,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 13:51:31,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 63 proven. 37 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2025-03-03 13:51:31,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:31,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:31,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308988073] [2025-03-03 13:51:31,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:31,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125326448] [2025-03-03 13:51:31,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125326448] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:31,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:31,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-03-03 13:51:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661003697] [2025-03-03 13:51:31,941 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:31,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 13:51:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:31,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 13:51:31,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:51:31,941 INFO L87 Difference]: Start difference. First operand 171 states and 245 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:51:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:32,111 INFO L93 Difference]: Finished difference Result 187 states and 258 transitions. [2025-03-03 13:51:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 13:51:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 114 [2025-03-03 13:51:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:32,112 INFO L225 Difference]: With dead ends: 187 [2025-03-03 13:51:32,112 INFO L226 Difference]: Without dead ends: 185 [2025-03-03 13:51:32,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:51:32,113 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:32,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 172 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:51:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-03 13:51:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2025-03-03 13:51:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 90 states have internal predecessors, (105), 75 states have call successors, (75), 18 states have call predecessors, (75), 18 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2025-03-03 13:51:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 254 transitions. [2025-03-03 13:51:32,151 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 254 transitions. Word has length 114 [2025-03-03 13:51:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:32,152 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 254 transitions. [2025-03-03 13:51:32,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2025-03-03 13:51:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 254 transitions. [2025-03-03 13:51:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-03 13:51:32,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:32,152 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:32,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 13:51:32,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:32,357 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:32,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash -909874172, now seen corresponding path program 4 times [2025-03-03 13:51:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:32,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485742565] [2025-03-03 13:51:32,358 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:32,369 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 116 statements into 2 equivalence classes. [2025-03-03 13:51:32,387 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 13:51:32,387 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:51:32,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:32,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114994438] [2025-03-03 13:51:32,388 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:32,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:32,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:51:32,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 116 statements into 2 equivalence classes. [2025-03-03 13:51:32,448 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 109 of 116 statements. [2025-03-03 13:51:32,448 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:32,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:32,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 13:51:32,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-03-03 13:51:32,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:33,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485742565] [2025-03-03 13:51:33,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:33,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114994438] [2025-03-03 13:51:33,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114994438] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:33,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:33,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:33,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784192011] [2025-03-03 13:51:33,110 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:33,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:33,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:33,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:51:33,111 INFO L87 Difference]: Start difference. First operand 183 states and 254 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:51:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:33,601 INFO L93 Difference]: Finished difference Result 221 states and 302 transitions. [2025-03-03 13:51:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:51:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 116 [2025-03-03 13:51:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:33,602 INFO L225 Difference]: With dead ends: 221 [2025-03-03 13:51:33,602 INFO L226 Difference]: Without dead ends: 219 [2025-03-03 13:51:33,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:51:33,603 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:33,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 428 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:51:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-03-03 13:51:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2025-03-03 13:51:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 106 states have (on average 1.169811320754717) internal successors, (124), 107 states have internal predecessors, (124), 87 states have call successors, (87), 22 states have call predecessors, (87), 22 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-03 13:51:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2025-03-03 13:51:33,650 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 116 [2025-03-03 13:51:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:33,650 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2025-03-03 13:51:33,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-03 13:51:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2025-03-03 13:51:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-03-03 13:51:33,651 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:33,651 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:33,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 13:51:33,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-03 13:51:33,855 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:33,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2083653651, now seen corresponding path program 5 times [2025-03-03 13:51:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:33,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089665933] [2025-03-03 13:51:33,855 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:33,860 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 119 statements into 10 equivalence classes. [2025-03-03 13:51:33,873 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 119 of 119 statements. [2025-03-03 13:51:33,873 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:51:33,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:33,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895882485] [2025-03-03 13:51:33,874 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:33,875 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:33,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:51:33,908 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 119 statements into 10 equivalence classes. [2025-03-03 13:51:33,939 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 119 of 119 statements. [2025-03-03 13:51:33,940 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-03 13:51:33,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:33,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 13:51:33,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 76 proven. 60 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2025-03-03 13:51:34,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089665933] [2025-03-03 13:51:34,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895882485] [2025-03-03 13:51:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895882485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:34,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:34,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:51:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595923649] [2025-03-03 13:51:34,887 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:34,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:51:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:34,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:51:34,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:51:34,887 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2025-03-03 13:51:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:35,520 INFO L93 Difference]: Finished difference Result 245 states and 338 transitions. [2025-03-03 13:51:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:51:35,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 119 [2025-03-03 13:51:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:35,522 INFO L225 Difference]: With dead ends: 245 [2025-03-03 13:51:35,522 INFO L226 Difference]: Without dead ends: 243 [2025-03-03 13:51:35,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:51:35,522 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:35,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 399 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:51:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-03 13:51:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2025-03-03 13:51:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 110 states have internal predecessors, (126), 90 states have call successors, (90), 22 states have call predecessors, (90), 22 states have return successors, (89), 88 states have call predecessors, (89), 89 states have call successors, (89) [2025-03-03 13:51:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 305 transitions. [2025-03-03 13:51:35,574 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 305 transitions. Word has length 119 [2025-03-03 13:51:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:35,574 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 305 transitions. [2025-03-03 13:51:35,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2025-03-03 13:51:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 305 transitions. [2025-03-03 13:51:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-03 13:51:35,575 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:35,575 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:35,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 13:51:35,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:51:35,781 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:35,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:35,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1097173026, now seen corresponding path program 6 times [2025-03-03 13:51:35,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:35,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244908536] [2025-03-03 13:51:35,781 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:51:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:35,786 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:51:35,814 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:51:35,814 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 13:51:35,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671169153] [2025-03-03 13:51:35,819 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:51:35,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:35,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:35,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:51:35,854 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 121 statements into 10 equivalence classes. [2025-03-03 13:51:35,913 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 62 of 121 statements. [2025-03-03 13:51:35,913 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-03 13:51:35,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:35,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-03 13:51:35,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 103 proven. 19 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2025-03-03 13:51:36,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:37,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244908536] [2025-03-03 13:51:37,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671169153] [2025-03-03 13:51:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671169153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:37,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:51:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655165528] [2025-03-03 13:51:37,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:37,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:51:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:37,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:51:37,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-03 13:51:37,093 INFO L87 Difference]: Start difference. First operand 221 states and 305 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:37,686 INFO L93 Difference]: Finished difference Result 232 states and 314 transitions. [2025-03-03 13:51:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:51:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2025-03-03 13:51:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:37,688 INFO L225 Difference]: With dead ends: 232 [2025-03-03 13:51:37,688 INFO L226 Difference]: Without dead ends: 230 [2025-03-03 13:51:37,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:51:37,688 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:37,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 278 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:51:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-03 13:51:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 213. [2025-03-03 13:51:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 111 states have internal predecessors, (124), 81 states have call successors, (81), 23 states have call predecessors, (81), 23 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2025-03-03 13:51:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 285 transitions. [2025-03-03 13:51:37,742 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 285 transitions. Word has length 121 [2025-03-03 13:51:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:37,745 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 285 transitions. [2025-03-03 13:51:37,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-03 13:51:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 285 transitions. [2025-03-03 13:51:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2025-03-03 13:51:37,746 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:37,747 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:37,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:37,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:51:37,948 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:37,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 421790415, now seen corresponding path program 2 times [2025-03-03 13:51:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348276144] [2025-03-03 13:51:37,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:37,954 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 127 statements into 2 equivalence classes. [2025-03-03 13:51:37,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 127 of 127 statements. [2025-03-03 13:51:37,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:37,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:37,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452246951] [2025-03-03 13:51:37,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:37,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:37,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:37,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:51:38,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 127 statements into 2 equivalence classes. [2025-03-03 13:51:38,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 127 of 127 statements. [2025-03-03 13:51:38,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:38,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:38,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-03 13:51:38,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-03 13:51:38,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:39,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348276144] [2025-03-03 13:51:39,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452246951] [2025-03-03 13:51:39,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452246951] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:39,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:39,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-03 13:51:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278294450] [2025-03-03 13:51:39,282 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:39,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:51:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:39,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:51:39,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:51:39,283 INFO L87 Difference]: Start difference. First operand 213 states and 285 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:51:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:39,856 INFO L93 Difference]: Finished difference Result 253 states and 342 transitions. [2025-03-03 13:51:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:51:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 127 [2025-03-03 13:51:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:39,857 INFO L225 Difference]: With dead ends: 253 [2025-03-03 13:51:39,857 INFO L226 Difference]: Without dead ends: 250 [2025-03-03 13:51:39,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:51:39,858 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:39,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 517 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:51:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-03 13:51:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 222. [2025-03-03 13:51:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 115 states have internal predecessors, (129), 85 states have call successors, (85), 24 states have call predecessors, (85), 24 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2025-03-03 13:51:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 298 transitions. [2025-03-03 13:51:39,912 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 298 transitions. Word has length 127 [2025-03-03 13:51:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:39,912 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 298 transitions. [2025-03-03 13:51:39,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2025-03-03 13:51:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 298 transitions. [2025-03-03 13:51:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-03 13:51:39,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:39,913 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:39,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:40,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:40,114 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:40,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash -396679361, now seen corresponding path program 7 times [2025-03-03 13:51:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:40,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099828351] [2025-03-03 13:51:40,114 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:51:40,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:40,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 137 statements into 1 equivalence classes. [2025-03-03 13:51:40,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 137 of 137 statements. [2025-03-03 13:51:40,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:40,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:40,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114414119] [2025-03-03 13:51:40,135 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:51:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:40,137 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:51:40,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 137 statements into 1 equivalence classes. [2025-03-03 13:51:40,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 137 of 137 statements. [2025-03-03 13:51:40,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:51:40,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:40,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-03 13:51:40,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 83 proven. 65 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2025-03-03 13:51:40,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 84 proven. 49 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2025-03-03 13:51:41,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099828351] [2025-03-03 13:51:41,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114414119] [2025-03-03 13:51:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114414119] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:51:41,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:51:41,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2025-03-03 13:51:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355559631] [2025-03-03 13:51:41,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:41,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-03 13:51:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:41,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-03 13:51:41,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2025-03-03 13:51:41,493 INFO L87 Difference]: Start difference. First operand 222 states and 298 transitions. Second operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-03-03 13:51:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:43,121 INFO L93 Difference]: Finished difference Result 282 states and 386 transitions. [2025-03-03 13:51:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 13:51:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) Word has length 137 [2025-03-03 13:51:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:43,123 INFO L225 Difference]: With dead ends: 282 [2025-03-03 13:51:43,123 INFO L226 Difference]: Without dead ends: 280 [2025-03-03 13:51:43,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:51:43,125 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:43,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 462 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:51:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2025-03-03 13:51:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 242. [2025-03-03 13:51:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 121 states have (on average 1.165289256198347) internal successors, (141), 123 states have internal predecessors, (141), 94 states have call successors, (94), 26 states have call predecessors, (94), 26 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2025-03-03 13:51:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 328 transitions. [2025-03-03 13:51:43,211 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 328 transitions. Word has length 137 [2025-03-03 13:51:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:43,211 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 328 transitions. [2025-03-03 13:51:43,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 27 states have internal predecessors, (42), 15 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 15 states have call predecessors, (46), 15 states have call successors, (46) [2025-03-03 13:51:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 328 transitions. [2025-03-03 13:51:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 13:51:43,214 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:43,214 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:43,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:43,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:43,418 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:43,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1870207617, now seen corresponding path program 3 times [2025-03-03 13:51:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330192239] [2025-03-03 13:51:43,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:43,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 15 equivalence classes. [2025-03-03 13:51:43,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 13:51:43,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-03 13:51:43,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896014376] [2025-03-03 13:51:43,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:51:43,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:43,452 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:43,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:51:43,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 146 statements into 15 equivalence classes. [2025-03-03 13:51:43,509 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 57 of 146 statements. [2025-03-03 13:51:43,509 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:51:43,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:43,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 13:51:43,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2025-03-03 13:51:44,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330192239] [2025-03-03 13:51:44,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:44,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896014376] [2025-03-03 13:51:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896014376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:44,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:44,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2025-03-03 13:51:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069488232] [2025-03-03 13:51:44,213 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:44,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:51:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:44,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:51:44,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:51:44,213 INFO L87 Difference]: Start difference. First operand 242 states and 328 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:51:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:44,489 INFO L93 Difference]: Finished difference Result 251 states and 336 transitions. [2025-03-03 13:51:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:51:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2025-03-03 13:51:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:44,491 INFO L225 Difference]: With dead ends: 251 [2025-03-03 13:51:44,491 INFO L226 Difference]: Without dead ends: 244 [2025-03-03 13:51:44,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:51:44,491 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:44,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 195 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:51:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-03-03 13:51:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2025-03-03 13:51:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 90 states have call successors, (90), 26 states have call predecessors, (90), 26 states have return successors, (89), 88 states have call predecessors, (89), 89 states have call successors, (89) [2025-03-03 13:51:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 315 transitions. [2025-03-03 13:51:44,563 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 315 transitions. Word has length 146 [2025-03-03 13:51:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:44,564 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 315 transitions. [2025-03-03 13:51:44,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:51:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 315 transitions. [2025-03-03 13:51:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-03 13:51:44,565 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:44,565 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:44,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-03 13:51:44,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-03 13:51:44,765 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:44,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2080103466, now seen corresponding path program 4 times [2025-03-03 13:51:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809487634] [2025-03-03 13:51:44,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:44,776 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:51:44,805 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:44,805 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:51:44,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451733478] [2025-03-03 13:51:44,806 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:51:44,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:44,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:44,810 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:44,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:51:44,842 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 148 statements into 2 equivalence classes. [2025-03-03 13:51:44,874 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 141 of 148 statements. [2025-03-03 13:51:44,874 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:51:44,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:44,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-03 13:51:44,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 99 proven. 67 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2025-03-03 13:51:45,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:49,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:49,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809487634] [2025-03-03 13:51:49,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:49,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451733478] [2025-03-03 13:51:49,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451733478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:49,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:49,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-03 13:51:49,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811025396] [2025-03-03 13:51:49,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:49,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:51:49,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:49,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:51:49,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:51:49,880 INFO L87 Difference]: Start difference. First operand 235 states and 315 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:51:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:52,056 INFO L93 Difference]: Finished difference Result 269 states and 368 transitions. [2025-03-03 13:51:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:51:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 148 [2025-03-03 13:51:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:52,059 INFO L225 Difference]: With dead ends: 269 [2025-03-03 13:51:52,059 INFO L226 Difference]: Without dead ends: 262 [2025-03-03 13:51:52,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:51:52,060 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:52,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 275 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-03 13:51:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2025-03-03 13:51:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 242. [2025-03-03 13:51:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 123 states have internal predecessors, (140), 94 states have call successors, (94), 26 states have call predecessors, (94), 26 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2025-03-03 13:51:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 327 transitions. [2025-03-03 13:51:52,145 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 327 transitions. Word has length 148 [2025-03-03 13:51:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:52,145 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 327 transitions. [2025-03-03 13:51:52,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2025-03-03 13:51:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 327 transitions. [2025-03-03 13:51:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-03-03 13:51:52,146 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:52,146 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:52,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 13:51:52,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 13:51:52,348 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:52,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1433697100, now seen corresponding path program 5 times [2025-03-03 13:51:52,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:52,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879989492] [2025-03-03 13:51:52,348 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:52,353 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 148 statements into 15 equivalence classes. [2025-03-03 13:51:52,376 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:52,376 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 13:51:52,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:52,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046218829] [2025-03-03 13:51:52,380 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:51:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:52,382 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:52,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 13:51:52,432 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 148 statements into 15 equivalence classes. [2025-03-03 13:51:52,626 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 148 of 148 statements. [2025-03-03 13:51:52,626 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-03 13:51:52,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:52,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:51:52,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:51:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 69 proven. 82 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2025-03-03 13:51:54,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:51:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:51:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879989492] [2025-03-03 13:51:56,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:51:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046218829] [2025-03-03 13:51:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046218829] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:51:56,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:51:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-03 13:51:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711087414] [2025-03-03 13:51:56,275 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:51:56,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:51:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:51:56,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:51:56,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:51:56,276 INFO L87 Difference]: Start difference. First operand 242 states and 327 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:51:59,119 INFO L93 Difference]: Finished difference Result 282 states and 384 transitions. [2025-03-03 13:51:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:51:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 148 [2025-03-03 13:51:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:51:59,124 INFO L225 Difference]: With dead ends: 282 [2025-03-03 13:51:59,124 INFO L226 Difference]: Without dead ends: 275 [2025-03-03 13:51:59,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:51:59,125 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:51:59,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 569 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-03-03 13:51:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2025-03-03 13:51:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 255. [2025-03-03 13:51:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 128 states have (on average 1.15625) internal successors, (148), 130 states have internal predecessors, (148), 98 states have call successors, (98), 28 states have call predecessors, (98), 28 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-03 13:51:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 343 transitions. [2025-03-03 13:51:59,207 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 343 transitions. Word has length 148 [2025-03-03 13:51:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:51:59,208 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 343 transitions. [2025-03-03 13:51:59,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2025-03-03 13:51:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 343 transitions. [2025-03-03 13:51:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-03-03 13:51:59,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:51:59,209 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:51:59,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-03 13:51:59,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:59,410 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:51:59,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:51:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 132055332, now seen corresponding path program 8 times [2025-03-03 13:51:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:51:59,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66203123] [2025-03-03 13:51:59,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:51:59,415 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-03 13:51:59,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-03 13:51:59,423 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:59,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:51:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659484957] [2025-03-03 13:51:59,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:51:59,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:51:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:51:59,428 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:51:59,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 13:51:59,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-03 13:51:59,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-03 13:51:59,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:51:59,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:51:59,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 13:51:59,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2025-03-03 13:52:00,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66203123] [2025-03-03 13:52:00,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659484957] [2025-03-03 13:52:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659484957] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:00,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:00,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-03 13:52:00,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465427978] [2025-03-03 13:52:00,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:00,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:52:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:00,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:52:00,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:52:00,501 INFO L87 Difference]: Start difference. First operand 255 states and 343 transitions. Second operand has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-03 13:52:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:01,397 INFO L93 Difference]: Finished difference Result 289 states and 388 transitions. [2025-03-03 13:52:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 13:52:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 158 [2025-03-03 13:52:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:01,400 INFO L225 Difference]: With dead ends: 289 [2025-03-03 13:52:01,400 INFO L226 Difference]: Without dead ends: 287 [2025-03-03 13:52:01,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:52:01,401 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:01,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 382 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:52:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2025-03-03 13:52:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 257. [2025-03-03 13:52:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 131 states have internal predecessors, (149), 98 states have call successors, (98), 29 states have call predecessors, (98), 29 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-03 13:52:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 344 transitions. [2025-03-03 13:52:01,490 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 344 transitions. Word has length 158 [2025-03-03 13:52:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:01,490 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 344 transitions. [2025-03-03 13:52:01,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-03 13:52:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 344 transitions. [2025-03-03 13:52:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-03-03 13:52:01,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:01,491 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:01,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 13:52:01,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:01,692 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:01,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1111423407, now seen corresponding path program 6 times [2025-03-03 13:52:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216548786] [2025-03-03 13:52:01,692 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:52:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:01,697 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 169 statements into 16 equivalence classes. [2025-03-03 13:52:01,712 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:01,713 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 13:52:01,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:01,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792986863] [2025-03-03 13:52:01,714 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:52:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:01,715 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:01,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 13:52:01,753 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 169 statements into 16 equivalence classes. [2025-03-03 13:52:01,799 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 86 of 169 statements. [2025-03-03 13:52:01,799 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:52:01,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:01,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 13:52:01,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 169 proven. 56 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2025-03-03 13:52:02,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:06,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216548786] [2025-03-03 13:52:06,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792986863] [2025-03-03 13:52:06,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792986863] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:06,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:06,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-03 13:52:06,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136073013] [2025-03-03 13:52:06,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:06,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:52:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:06,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:52:06,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:52:06,478 INFO L87 Difference]: Start difference. First operand 257 states and 344 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-03 13:52:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:09,319 INFO L93 Difference]: Finished difference Result 304 states and 404 transitions. [2025-03-03 13:52:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:52:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 169 [2025-03-03 13:52:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:09,321 INFO L225 Difference]: With dead ends: 304 [2025-03-03 13:52:09,321 INFO L226 Difference]: Without dead ends: 301 [2025-03-03 13:52:09,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:52:09,322 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:09,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 394 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2025-03-03 13:52:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2025-03-03 13:52:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 243. [2025-03-03 13:52:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 129 states have internal predecessors, (143), 87 states have call successors, (87), 29 states have call predecessors, (87), 29 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-03 13:52:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2025-03-03 13:52:09,417 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 169 [2025-03-03 13:52:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:09,417 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2025-03-03 13:52:09,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-03 13:52:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2025-03-03 13:52:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-03-03 13:52:09,418 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:09,418 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:09,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:09,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-03 13:52:09,618 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:09,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:09,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1503587173, now seen corresponding path program 7 times [2025-03-03 13:52:09,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:09,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448836928] [2025-03-03 13:52:09,619 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:52:09,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:09,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-03-03 13:52:09,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:09,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:09,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:09,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265062649] [2025-03-03 13:52:09,643 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:52:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:09,650 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:09,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 13:52:09,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-03-03 13:52:09,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:09,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:09,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:09,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-03 13:52:09,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2025-03-03 13:52:10,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448836928] [2025-03-03 13:52:16,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265062649] [2025-03-03 13:52:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265062649] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:16,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:16,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:16,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847265433] [2025-03-03 13:52:16,491 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:16,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:16,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:16,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=624, Unknown=1, NotChecked=0, Total=702 [2025-03-03 13:52:16,492 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2025-03-03 13:52:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:18,529 INFO L93 Difference]: Finished difference Result 280 states and 371 transitions. [2025-03-03 13:52:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:52:18,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 169 [2025-03-03 13:52:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:18,531 INFO L225 Difference]: With dead ends: 280 [2025-03-03 13:52:18,531 INFO L226 Difference]: Without dead ends: 273 [2025-03-03 13:52:18,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=146, Invalid=1185, Unknown=1, NotChecked=0, Total=1332 [2025-03-03 13:52:18,531 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 34 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:18,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 630 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-03 13:52:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-03 13:52:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2025-03-03 13:52:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 133 states have internal predecessors, (148), 91 states have call successors, (91), 30 states have call predecessors, (91), 30 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2025-03-03 13:52:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 329 transitions. [2025-03-03 13:52:18,622 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 329 transitions. Word has length 169 [2025-03-03 13:52:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:18,622 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 329 transitions. [2025-03-03 13:52:18,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2025-03-03 13:52:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 329 transitions. [2025-03-03 13:52:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-03-03 13:52:18,623 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:18,623 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:18,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 13:52:18,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 13:52:18,824 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:18,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2010213393, now seen corresponding path program 8 times [2025-03-03 13:52:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:18,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346914374] [2025-03-03 13:52:18,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:18,833 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 169 statements into 2 equivalence classes. [2025-03-03 13:52:18,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:18,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:18,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:18,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751836497] [2025-03-03 13:52:18,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:18,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:18,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:18,846 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:18,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 13:52:18,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 169 statements into 2 equivalence classes. [2025-03-03 13:52:18,914 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 169 of 169 statements. [2025-03-03 13:52:18,914 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:18,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:18,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-03 13:52:18,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2025-03-03 13:52:20,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:23,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:23,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346914374] [2025-03-03 13:52:23,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:23,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751836497] [2025-03-03 13:52:23,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751836497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:23,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:23,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-03 13:52:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554769301] [2025-03-03 13:52:23,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:23,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:52:23,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:23,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:52:23,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:23,067 INFO L87 Difference]: Start difference. First operand 252 states and 329 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:52:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:27,448 INFO L93 Difference]: Finished difference Result 298 states and 397 transitions. [2025-03-03 13:52:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:52:27,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 169 [2025-03-03 13:52:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:27,450 INFO L225 Difference]: With dead ends: 298 [2025-03-03 13:52:27,450 INFO L226 Difference]: Without dead ends: 295 [2025-03-03 13:52:27,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:52:27,451 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 27 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:27,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 732 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2025-03-03 13:52:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2025-03-03 13:52:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 266. [2025-03-03 13:52:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 138 states have internal predecessors, (155), 99 states have call successors, (99), 31 states have call predecessors, (99), 31 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2025-03-03 13:52:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 352 transitions. [2025-03-03 13:52:27,572 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 352 transitions. Word has length 169 [2025-03-03 13:52:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:27,572 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 352 transitions. [2025-03-03 13:52:27,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2025-03-03 13:52:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 352 transitions. [2025-03-03 13:52:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2025-03-03 13:52:27,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:27,574 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:27,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 13:52:27,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 13:52:27,775 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:27,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash -829469468, now seen corresponding path program 9 times [2025-03-03 13:52:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784965522] [2025-03-03 13:52:27,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:27,781 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 171 statements into 16 equivalence classes. [2025-03-03 13:52:27,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) and asserted 171 of 171 statements. [2025-03-03 13:52:27,798 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2025-03-03 13:52:27,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:27,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716124375] [2025-03-03 13:52:27,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:52:27,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:27,801 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:27,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 13:52:27,834 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 171 statements into 16 equivalence classes. [2025-03-03 13:52:27,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 73 of 171 statements. [2025-03-03 13:52:27,875 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:52:27,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:27,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 13:52:27,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 261 proven. 30 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2025-03-03 13:52:28,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:28,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784965522] [2025-03-03 13:52:28,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716124375] [2025-03-03 13:52:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716124375] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:28,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:28,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-03 13:52:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289349578] [2025-03-03 13:52:28,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:28,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:52:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:28,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:52:28,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:52:28,625 INFO L87 Difference]: Start difference. First operand 266 states and 352 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-03 13:52:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:29,588 INFO L93 Difference]: Finished difference Result 296 states and 376 transitions. [2025-03-03 13:52:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:52:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 171 [2025-03-03 13:52:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:29,589 INFO L225 Difference]: With dead ends: 296 [2025-03-03 13:52:29,589 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 13:52:29,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:52:29,590 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:29,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 155 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:52:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 13:52:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 13:52:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2025-03-03 13:52:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 13:52:29,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 171 [2025-03-03 13:52:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:29,591 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 13:52:29,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-03 13:52:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 13:52:29,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 13:52:29,594 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 13:52:29,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:29,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 13:52:29,797 INFO L422 BasicCegarLoop]: Path program histogram: [9, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:29,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.