./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 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-8fc3dc6-m [2025-03-16 18:09:42,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:09:42,263 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:09:42,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:09:42,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:09:42,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:09:42,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:09:42,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:09:42,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:09:42,283 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:09:42,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:09:42,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:09:42,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:09:42,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:09:42,283 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:09:42,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:09:42,284 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:09:42,284 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:09:42,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:09:42,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:09:42,285 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 [2025-03-16 18:09:42,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:09:42,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:09:42,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:09:42,505 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:09:42,505 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:09:42,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-03-16 18:09:43,631 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0934f8c/71364723cae64fe28377f27ec690a226/FLAG6442e217a [2025-03-16 18:09:43,816 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:09:43,816 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2025-03-16 18:09:43,825 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0934f8c/71364723cae64fe28377f27ec690a226/FLAG6442e217a [2025-03-16 18:09:44,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0934f8c/71364723cae64fe28377f27ec690a226 [2025-03-16 18:09:44,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:09:44,189 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:09:44,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:09:44,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:09:44,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:09:44,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9fcaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44, skipping insertion in model container [2025-03-16 18:09:44,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,202 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:09:44,294 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] [2025-03-16 18:09:44,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:09:44,318 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:09:44,325 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] [2025-03-16 18:09:44,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:09:44,347 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:09:44,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44 WrapperNode [2025-03-16 18:09:44,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:09:44,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:09:44,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:09:44,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:09:44,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,367 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2025-03-16 18:09:44,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:09:44,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:09:44,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:09:44,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:09:44,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,373 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,379 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 18:09:44,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,382 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:09:44,384 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:09:44,384 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:09:44,384 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:09:44,385 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (1/1) ... [2025-03-16 18:09:44,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:09:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:44,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:09:44,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:09:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:09:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:09:44,420 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:09:44,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:09:44,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:09:44,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:09:44,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:09:44,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:09:44,459 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:09:44,460 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:09:44,566 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 18:09:44,566 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:09:44,571 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:09:44,571 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:09:44,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:09:44 BoogieIcfgContainer [2025-03-16 18:09:44,572 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:09:44,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:09:44,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:09:44,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:09:44,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:09:44" (1/3) ... [2025-03-16 18:09:44,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1e368b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:09:44, skipping insertion in model container [2025-03-16 18:09:44,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:09:44" (2/3) ... [2025-03-16 18:09:44,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1e368b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:09:44, skipping insertion in model container [2025-03-16 18:09:44,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:09:44" (3/3) ... [2025-03-16 18:09:44,580 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2025-03-16 18:09:44,589 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:09:44,590 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_valuebound20.c that has 3 procedures, 31 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:09:44,621 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:09:44,629 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;@48fda8b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:09:44,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:09:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2025-03-16 18:09:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 18:09:44,637 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:44,637 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] [2025-03-16 18:09:44,637 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:44,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:44,640 INFO L85 PathProgramCache]: Analyzing trace with hash 948231786, now seen corresponding path program 1 times [2025-03-16 18:09:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:44,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082693897] [2025-03-16 18:09:44,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:44,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:44,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:44,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:44,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-16 18:09:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082693897] [2025-03-16 18:09:44,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082693897] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960316127] [2025-03-16 18:09:44,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:44,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:44,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:44,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:09:44,800 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:44,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:44,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:44,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:44,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:09:44,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-16 18:09:44,848 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:44,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960316127] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:44,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:44,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:09:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432743227] [2025-03-16 18:09:44,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:44,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:09:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:44,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:09:44,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:09:44,866 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:09:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:44,878 INFO L93 Difference]: Finished difference Result 60 states and 101 transitions. [2025-03-16 18:09:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:09:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-03-16 18:09:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:44,882 INFO L225 Difference]: With dead ends: 60 [2025-03-16 18:09:44,882 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 18:09:44,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:09:44,885 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:44,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 18:09:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-16 18:09:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-03-16 18:09:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2025-03-16 18:09:44,909 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 38 [2025-03-16 18:09:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:44,909 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2025-03-16 18:09:44,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:09:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2025-03-16 18:09:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 18:09:44,910 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:44,911 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] [2025-03-16 18:09:44,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:09:45,111 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 [2025-03-16 18:09:45,111 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:45,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -390224212, now seen corresponding path program 1 times [2025-03-16 18:09:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:45,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352900144] [2025-03-16 18:09:45,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:45,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:45,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:45,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:45,143 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:45,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:45,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419699316] [2025-03-16 18:09:45,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:45,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:45,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:09:45,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:45,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:45,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:45,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:45,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:09:45,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 18:09:45,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:45,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352900144] [2025-03-16 18:09:45,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:45,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419699316] [2025-03-16 18:09:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419699316] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:45,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:45,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825269540] [2025-03-16 18:09:45,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:45,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:45,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:45,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:45,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:45,257 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-03-16 18:09:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:45,300 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2025-03-16 18:09:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 38 [2025-03-16 18:09:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:45,301 INFO L225 Difference]: With dead ends: 40 [2025-03-16 18:09:45,301 INFO L226 Difference]: Without dead ends: 38 [2025-03-16 18:09:45,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:09:45,302 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 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 [2025-03-16 18:09:45,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-16 18:09:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2025-03-16 18:09:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 19 states have internal predecessors, (19), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-16 18:09:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2025-03-16 18:09:45,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 38 [2025-03-16 18:09:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:45,313 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2025-03-16 18:09:45,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-03-16 18:09:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2025-03-16 18:09:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 18:09:45,314 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:45,314 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] [2025-03-16 18:09:45,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 18:09:45,516 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 [2025-03-16 18:09:45,516 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:45,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash -392309582, now seen corresponding path program 1 times [2025-03-16 18:09:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:45,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067037766] [2025-03-16 18:09:45,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:45,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:45,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:45,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:45,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 18:09:45,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:45,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067037766] [2025-03-16 18:09:45,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067037766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:45,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868214497] [2025-03-16 18:09:45,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:45,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:45,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:45,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:09:45,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 18:09:45,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:09:45,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:45,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:45,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 18:09:45,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 18:09:45,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:45,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868214497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:45,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:45,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2025-03-16 18:09:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406433002] [2025-03-16 18:09:45,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:45,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 18:09:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:45,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 18:09:45,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:09:45,952 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 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) [2025-03-16 18:09:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:46,109 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2025-03-16 18:09:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 18:09:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 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 38 [2025-03-16 18:09:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:46,111 INFO L225 Difference]: With dead ends: 53 [2025-03-16 18:09:46,111 INFO L226 Difference]: Without dead ends: 45 [2025-03-16 18:09:46,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2025-03-16 18:09:46,112 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:46,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 216 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-16 18:09:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2025-03-16 18:09:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 24 states have internal predecessors, (25), 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) [2025-03-16 18:09:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2025-03-16 18:09:46,119 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2025-03-16 18:09:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:46,119 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2025-03-16 18:09:46,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 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) [2025-03-16 18:09:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2025-03-16 18:09:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 18:09:46,120 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:46,120 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] [2025-03-16 18:09:46,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:09:46,324 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 [2025-03-16 18:09:46,324 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:46,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1378011465, now seen corresponding path program 1 times [2025-03-16 18:09:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079619323] [2025-03-16 18:09:46,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:46,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 18:09:46,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 18:09:46,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:46,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922702924] [2025-03-16 18:09:46,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:46,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:46,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:09:46,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 18:09:46,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 18:09:46,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:46,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:46,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:09:46,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 18:09:46,436 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079619323] [2025-03-16 18:09:46,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922702924] [2025-03-16 18:09:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922702924] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:46,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:46,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:46,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878172502] [2025-03-16 18:09:46,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:46,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:46,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:46,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:46,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:46,437 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-16 18:09:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:46,489 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2025-03-16 18:09:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 43 [2025-03-16 18:09:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:46,490 INFO L225 Difference]: With dead ends: 51 [2025-03-16 18:09:46,491 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 18:09:46,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:09:46,492 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 134 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 [2025-03-16 18:09:46,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 134 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 18:09:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-03-16 18:09:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 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) [2025-03-16 18:09:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2025-03-16 18:09:46,502 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 43 [2025-03-16 18:09:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:46,502 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2025-03-16 18:09:46,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-16 18:09:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2025-03-16 18:09:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 18:09:46,505 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:46,505 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] [2025-03-16 18:09:46,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:09:46,705 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 [2025-03-16 18:09:46,705 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:46,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash 874923031, now seen corresponding path program 1 times [2025-03-16 18:09:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610548210] [2025-03-16 18:09:46,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:46,710 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 18:09:46,726 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 18:09:46,726 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:46,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:46,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745917318] [2025-03-16 18:09:46,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:46,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:46,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:46,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:46,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:09:46,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 18:09:46,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 18:09:46,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:46,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:46,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:09:46,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-16 18:09:46,872 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:09:46,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610548210] [2025-03-16 18:09:46,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745917318] [2025-03-16 18:09:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745917318] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:46,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:46,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777811798] [2025-03-16 18:09:46,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:46,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:46,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:46,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:46,874 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-16 18:09:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:46,919 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2025-03-16 18:09:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:09:46,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 53 [2025-03-16 18:09:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:46,920 INFO L225 Difference]: With dead ends: 55 [2025-03-16 18:09:46,920 INFO L226 Difference]: Without dead ends: 53 [2025-03-16 18:09:46,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:09:46,921 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 121 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 [2025-03-16 18:09:46,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 121 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-16 18:09:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2025-03-16 18:09:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 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) [2025-03-16 18:09:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2025-03-16 18:09:46,928 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 53 [2025-03-16 18:09:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:46,928 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2025-03-16 18:09:46,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-16 18:09:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2025-03-16 18:09:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 18:09:46,929 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:46,929 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] [2025-03-16 18:09:46,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 18:09:47,134 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 [2025-03-16 18:09:47,134 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:47,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1835406633, now seen corresponding path program 1 times [2025-03-16 18:09:47,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547580088] [2025-03-16 18:09:47,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:47,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:47,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-16 18:09:47,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 18:09:47,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:47,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:47,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835109294] [2025-03-16 18:09:47,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:47,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:47,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:47,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:09:47,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-16 18:09:47,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 18:09:47,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:47,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:47,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:09:47,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 18:09:47,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-16 18:09:47,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:47,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547580088] [2025-03-16 18:09:47,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:47,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835109294] [2025-03-16 18:09:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835109294] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:47,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:47,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-03-16 18:09:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775149296] [2025-03-16 18:09:47,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:47,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:09:47,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:47,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:09:47,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:09:47,324 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2025-03-16 18:09:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:47,415 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2025-03-16 18:09:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:09:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 59 [2025-03-16 18:09:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:47,416 INFO L225 Difference]: With dead ends: 78 [2025-03-16 18:09:47,416 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 18:09:47,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:47,417 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:47,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 201 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 18:09:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2025-03-16 18:09:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 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) [2025-03-16 18:09:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2025-03-16 18:09:47,431 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 59 [2025-03-16 18:09:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:47,431 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2025-03-16 18:09:47,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2025-03-16 18:09:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2025-03-16 18:09:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 18:09:47,433 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:47,434 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] [2025-03-16 18:09:47,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:47,634 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 [2025-03-16 18:09:47,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:47,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash -194270950, now seen corresponding path program 1 times [2025-03-16 18:09:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:47,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784488468] [2025-03-16 18:09:47,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:47,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:47,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 18:09:47,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:09:47,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:47,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-16 18:09:47,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784488468] [2025-03-16 18:09:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784488468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:47,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635379432] [2025-03-16 18:09:47,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:47,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:47,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:47,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:47,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:09:47,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 18:09:47,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 18:09:47,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:47,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:47,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:09:47,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-16 18:09:47,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-16 18:09:47,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635379432] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:47,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:09:47,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-16 18:09:47,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575074994] [2025-03-16 18:09:47,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:47,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:09:47,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:47,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:09:47,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:09:47,947 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 18:09:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:48,081 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2025-03-16 18:09:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 18:09:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2025-03-16 18:09:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:48,083 INFO L225 Difference]: With dead ends: 90 [2025-03-16 18:09:48,083 INFO L226 Difference]: Without dead ends: 82 [2025-03-16 18:09:48,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-16 18:09:48,083 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:48,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 201 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:48,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-16 18:09:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2025-03-16 18:09:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 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) [2025-03-16 18:09:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2025-03-16 18:09:48,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 61 [2025-03-16 18:09:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:48,100 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2025-03-16 18:09:48,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-16 18:09:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2025-03-16 18:09:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 18:09:48,100 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:48,101 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] [2025-03-16 18:09:48,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:09:48,301 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 [2025-03-16 18:09:48,301 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:48,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1863050063, now seen corresponding path program 1 times [2025-03-16 18:09:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:48,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378280961] [2025-03-16 18:09:48,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:48,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:48,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 18:09:48,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 18:09:48,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:48,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:48,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277696751] [2025-03-16 18:09:48,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:48,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:48,327 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:48,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:09:48,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-16 18:09:48,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 18:09:48,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:48,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:48,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 18:09:48,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-16 18:09:48,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:48,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378280961] [2025-03-16 18:09:48,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277696751] [2025-03-16 18:09:48,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277696751] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:48,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:48,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-03-16 18:09:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870617370] [2025-03-16 18:09:48,499 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:48,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:09:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:48,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:09:48,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:09:48,500 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2025-03-16 18:09:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:48,587 INFO L93 Difference]: Finished difference Result 104 states and 153 transitions. [2025-03-16 18:09:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:09:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 66 [2025-03-16 18:09:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:48,589 INFO L225 Difference]: With dead ends: 104 [2025-03-16 18:09:48,589 INFO L226 Difference]: Without dead ends: 101 [2025-03-16 18:09:48,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:48,590 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 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 [2025-03-16 18:09:48,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-16 18:09:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2025-03-16 18:09:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 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) [2025-03-16 18:09:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 146 transitions. [2025-03-16 18:09:48,611 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 146 transitions. Word has length 66 [2025-03-16 18:09:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:48,612 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 146 transitions. [2025-03-16 18:09:48,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2025-03-16 18:09:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 146 transitions. [2025-03-16 18:09:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 18:09:48,612 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:48,613 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] [2025-03-16 18:09:48,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:48,817 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 [2025-03-16 18:09:48,817 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:48,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1629311028, now seen corresponding path program 2 times [2025-03-16 18:09:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248741888] [2025-03-16 18:09:48,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:48,828 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-03-16 18:09:48,842 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 18:09:48,845 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:48,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169983149] [2025-03-16 18:09:48,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:48,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:48,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:48,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:09:48,876 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 71 statements into 2 equivalence classes. [2025-03-16 18:09:48,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 18:09:48,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:48,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:48,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 18:09:48,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-16 18:09:49,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:49,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:49,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248741888] [2025-03-16 18:09:49,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:49,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169983149] [2025-03-16 18:09:49,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169983149] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:49,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:49,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-16 18:09:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073444720] [2025-03-16 18:09:49,069 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:49,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:09:49,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:49,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:09:49,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:09:49,070 INFO L87 Difference]: Start difference. First operand 98 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2025-03-16 18:09:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:49,194 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2025-03-16 18:09:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:09:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 71 [2025-03-16 18:09:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:49,196 INFO L225 Difference]: With dead ends: 110 [2025-03-16 18:09:49,197 INFO L226 Difference]: Without dead ends: 108 [2025-03-16 18:09:49,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:09:49,197 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 190 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 [2025-03-16 18:09:49,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 190 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:09:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-16 18:09:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2025-03-16 18:09:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 53 states have internal predecessors, (64), 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) [2025-03-16 18:09:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 152 transitions. [2025-03-16 18:09:49,220 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 152 transitions. Word has length 71 [2025-03-16 18:09:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:49,220 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 152 transitions. [2025-03-16 18:09:49,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2025-03-16 18:09:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 152 transitions. [2025-03-16 18:09:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-16 18:09:49,221 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:49,221 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] [2025-03-16 18:09:49,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:49,421 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 [2025-03-16 18:09:49,422 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:49,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:49,422 INFO L85 PathProgramCache]: Analyzing trace with hash -474475857, now seen corresponding path program 3 times [2025-03-16 18:09:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007549036] [2025-03-16 18:09:49,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:49,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 6 equivalence classes. [2025-03-16 18:09:49,452 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 76 of 76 statements. [2025-03-16 18:09:49,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 18:09:49,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:49,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653962064] [2025-03-16 18:09:49,452 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:49,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:49,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:49,454 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:49,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:09:49,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 6 equivalence classes. [2025-03-16 18:09:49,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 76 statements. [2025-03-16 18:09:49,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 18:09:49,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:49,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 18:09:49,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 43 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-03-16 18:09:50,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007549036] [2025-03-16 18:09:50,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:50,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653962064] [2025-03-16 18:09:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653962064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:50,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:50,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-16 18:09:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837279440] [2025-03-16 18:09:50,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:50,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:09:50,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:50,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:09:50,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:09:50,457 INFO L87 Difference]: Start difference. First operand 106 states and 152 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2025-03-16 18:09:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:50,797 INFO L93 Difference]: Finished difference Result 114 states and 159 transitions. [2025-03-16 18:09:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:09:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 76 [2025-03-16 18:09:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:50,798 INFO L225 Difference]: With dead ends: 114 [2025-03-16 18:09:50,799 INFO L226 Difference]: Without dead ends: 112 [2025-03-16 18:09:50,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:09:50,800 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:50,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 156 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:09:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-16 18:09:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2025-03-16 18:09:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 56 states have internal predecessors, (67), 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) [2025-03-16 18:09:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 155 transitions. [2025-03-16 18:09:50,819 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 155 transitions. Word has length 76 [2025-03-16 18:09:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:50,819 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 155 transitions. [2025-03-16 18:09:50,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2025-03-16 18:09:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 155 transitions. [2025-03-16 18:09:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-16 18:09:50,819 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:50,820 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] [2025-03-16 18:09:50,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:51,020 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 [2025-03-16 18:09:51,020 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:51,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1793736189, now seen corresponding path program 1 times [2025-03-16 18:09:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053177203] [2025-03-16 18:09:51,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:51,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-16 18:09:51,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 18:09:51,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:51,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:51,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520113435] [2025-03-16 18:09:51,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:51,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:51,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:51,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:09:51,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 18:09:51,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-16 18:09:51,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 18:09:51,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:51,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:51,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-16 18:09:51,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2025-03-16 18:09:51,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-16 18:09:51,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053177203] [2025-03-16 18:09:51,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520113435] [2025-03-16 18:09:51,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520113435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:51,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:51,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-16 18:09:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456170226] [2025-03-16 18:09:51,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:51,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:09:51,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:51,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:09:51,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:09:51,654 INFO L87 Difference]: Start difference. First operand 110 states and 155 transitions. Second operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 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) [2025-03-16 18:09:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:53,220 INFO L93 Difference]: Finished difference Result 194 states and 302 transitions. [2025-03-16 18:09:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-16 18:09:53,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 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 82 [2025-03-16 18:09:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:53,225 INFO L225 Difference]: With dead ends: 194 [2025-03-16 18:09:53,225 INFO L226 Difference]: Without dead ends: 190 [2025-03-16 18:09:53,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 18:09:53,227 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:53,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 455 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-16 18:09:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2025-03-16 18:09:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2025-03-16 18:09:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 80 states have (on average 1.3375) internal successors, (107), 83 states have internal predecessors, (107), 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) [2025-03-16 18:09:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 293 transitions. [2025-03-16 18:09:53,268 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 293 transitions. Word has length 82 [2025-03-16 18:09:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:53,269 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 293 transitions. [2025-03-16 18:09:53,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 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) [2025-03-16 18:09:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 293 transitions. [2025-03-16 18:09:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-16 18:09:53,270 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:53,270 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] [2025-03-16 18:09:53,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 18:09:53,471 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,SelfDestructingSolverStorable10 [2025-03-16 18:09:53,471 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:53,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash -418870345, now seen corresponding path program 4 times [2025-03-16 18:09:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:53,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275558274] [2025-03-16 18:09:53,471 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:09:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:53,476 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 89 statements into 2 equivalence classes. [2025-03-16 18:09:53,483 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 89 statements. [2025-03-16 18:09:53,484 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:09:53,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2025-03-16 18:09:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275558274] [2025-03-16 18:09:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275558274] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:09:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:09:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:09:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542445110] [2025-03-16 18:09:53,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:09:53,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:09:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:53,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:09:53,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:09:53,540 INFO L87 Difference]: Start difference. First operand 187 states and 293 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2025-03-16 18:09:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:53,610 INFO L93 Difference]: Finished difference Result 232 states and 361 transitions. [2025-03-16 18:09:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:09:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 89 [2025-03-16 18:09:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:53,613 INFO L225 Difference]: With dead ends: 232 [2025-03-16 18:09:53,613 INFO L226 Difference]: Without dead ends: 170 [2025-03-16 18:09:53,615 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 [2025-03-16 18:09:53,615 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 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 [2025-03-16 18:09:53,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:09:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-16 18:09:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2025-03-16 18:09:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 73 states have internal predecessors, (87), 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) [2025-03-16 18:09:53,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 241 transitions. [2025-03-16 18:09:53,650 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 241 transitions. Word has length 89 [2025-03-16 18:09:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:53,650 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 241 transitions. [2025-03-16 18:09:53,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2025-03-16 18:09:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 241 transitions. [2025-03-16 18:09:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-16 18:09:53,654 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:53,654 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] [2025-03-16 18:09:53,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-16 18:09:53,654 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:53,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash 974568300, now seen corresponding path program 1 times [2025-03-16 18:09:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:53,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826152392] [2025-03-16 18:09:53,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:53,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-16 18:09:53,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-16 18:09:53,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:53,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067612340] [2025-03-16 18:09:53,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:09:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:53,681 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) [2025-03-16 18:09:53,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 18:09:53,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-16 18:09:53,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-16 18:09:53,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:09:53,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:53,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 18:09:53,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-16 18:09:54,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826152392] [2025-03-16 18:09:54,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067612340] [2025-03-16 18:09:54,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067612340] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:54,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:54,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-16 18:09:54,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296094067] [2025-03-16 18:09:54,941 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:54,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:09:54,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:54,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:09:54,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:09:54,942 INFO L87 Difference]: Start difference. First operand 161 states and 241 transitions. Second operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2025-03-16 18:09:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:55,639 INFO L93 Difference]: Finished difference Result 173 states and 251 transitions. [2025-03-16 18:09:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:09:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 97 [2025-03-16 18:09:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:55,641 INFO L225 Difference]: With dead ends: 173 [2025-03-16 18:09:55,641 INFO L226 Difference]: Without dead ends: 171 [2025-03-16 18:09:55,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:09:55,641 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:55,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 257 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 18:09:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-16 18:09:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2025-03-16 18:09:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 79 states have internal predecessors, (93), 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) [2025-03-16 18:09:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 247 transitions. [2025-03-16 18:09:55,671 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 247 transitions. Word has length 97 [2025-03-16 18:09:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:55,672 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 247 transitions. [2025-03-16 18:09:55,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2025-03-16 18:09:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 247 transitions. [2025-03-16 18:09:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-16 18:09:55,673 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:55,673 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] [2025-03-16 18:09:55,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:55,873 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 [2025-03-16 18:09:55,873 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:55,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1849036004, now seen corresponding path program 2 times [2025-03-16 18:09:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855973633] [2025-03-16 18:09:55,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:55,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 110 statements into 2 equivalence classes. [2025-03-16 18:09:55,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:09:55,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:55,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:55,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132030264] [2025-03-16 18:09:55,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:09:55,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:55,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:55,898 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) [2025-03-16 18:09:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 18:09:55,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 110 statements into 2 equivalence classes. [2025-03-16 18:09:55,951 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 18:09:55,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:09:55,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:55,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-16 18:09:55,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 61 proven. 41 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2025-03-16 18:09:56,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-16 18:09:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855973633] [2025-03-16 18:09:56,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132030264] [2025-03-16 18:09:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132030264] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:09:56,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:09:56,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-16 18:09:56,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146087965] [2025-03-16 18:09:56,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:56,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 18:09:56,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:56,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 18:09:56,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:09:56,414 INFO L87 Difference]: Start difference. First operand 169 states and 247 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 19 states have internal predecessors, (38), 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) [2025-03-16 18:09:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:57,353 INFO L93 Difference]: Finished difference Result 197 states and 290 transitions. [2025-03-16 18:09:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 18:09:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 19 states have internal predecessors, (38), 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 110 [2025-03-16 18:09:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:57,355 INFO L225 Difference]: With dead ends: 197 [2025-03-16 18:09:57,355 INFO L226 Difference]: Without dead ends: 191 [2025-03-16 18:09:57,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 18:09:57,356 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:57,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 316 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 18:09:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-16 18:09:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2025-03-16 18:09:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 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) [2025-03-16 18:09:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 244 transitions. [2025-03-16 18:09:57,395 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 244 transitions. Word has length 110 [2025-03-16 18:09:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:57,395 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 244 transitions. [2025-03-16 18:09:57,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 19 states have internal predecessors, (38), 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) [2025-03-16 18:09:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 244 transitions. [2025-03-16 18:09:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-16 18:09:57,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:57,396 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] [2025-03-16 18:09:57,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 18:09:57,596 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 [2025-03-16 18:09:57,596 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:57,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1907684372, now seen corresponding path program 3 times [2025-03-16 18:09:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:57,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28837400] [2025-03-16 18:09:57,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:57,602 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 113 statements into 10 equivalence classes. [2025-03-16 18:09:57,634 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 113 of 113 statements. [2025-03-16 18:09:57,634 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-16 18:09:57,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101989819] [2025-03-16 18:09:57,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:09:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:57,642 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) [2025-03-16 18:09:57,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 18:09:57,681 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 113 statements into 10 equivalence classes. [2025-03-16 18:09:57,709 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 66 of 113 statements. [2025-03-16 18:09:57,709 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:09:57,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:57,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-16 18:09:57,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 62 proven. 40 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2025-03-16 18:09:58,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28837400] [2025-03-16 18:09:58,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101989819] [2025-03-16 18:09:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101989819] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:58,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:58,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2025-03-16 18:09:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973793365] [2025-03-16 18:09:58,203 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:58,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 18:09:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:58,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 18:09:58,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:09:58,204 INFO L87 Difference]: Start difference. First operand 170 states and 244 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:09:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:58,483 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2025-03-16 18:09:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:09:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 113 [2025-03-16 18:09:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:58,485 INFO L225 Difference]: With dead ends: 186 [2025-03-16 18:09:58,485 INFO L226 Difference]: Without dead ends: 184 [2025-03-16 18:09:58,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2025-03-16 18:09:58,486 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:58,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:09:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2025-03-16 18:09:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2025-03-16 18:09:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 89 states have internal predecessors, (104), 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) [2025-03-16 18:09:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 253 transitions. [2025-03-16 18:09:58,531 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 253 transitions. Word has length 113 [2025-03-16 18:09:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:58,531 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 253 transitions. [2025-03-16 18:09:58,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-16 18:09:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 253 transitions. [2025-03-16 18:09:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2025-03-16 18:09:58,532 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:58,532 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] [2025-03-16 18:09:58,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 18:09:58,732 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 [2025-03-16 18:09:58,732 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:09:58,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:09:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1093065663, now seen corresponding path program 4 times [2025-03-16 18:09:58,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:09:58,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127219675] [2025-03-16 18:09:58,733 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:09:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:09:58,737 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 115 statements into 2 equivalence classes. [2025-03-16 18:09:58,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-16 18:09:58,750 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:09:58,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:09:58,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615880761] [2025-03-16 18:09:58,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:09:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:09:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:09:58,754 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) [2025-03-16 18:09:58,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 18:09:58,786 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 115 statements into 2 equivalence classes. [2025-03-16 18:09:58,814 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 109 of 115 statements. [2025-03-16 18:09:58,814 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:09:58,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:09:58,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 18:09:58,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:09:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 57 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2025-03-16 18:09:59,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:09:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:09:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127219675] [2025-03-16 18:09:59,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:09:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615880761] [2025-03-16 18:09:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615880761] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:09:59,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:09:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-16 18:09:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310845558] [2025-03-16 18:09:59,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:09:59,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:09:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:09:59,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:09:59,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:09:59,398 INFO L87 Difference]: Start difference. First operand 182 states and 253 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2025-03-16 18:09:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:09:59,860 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2025-03-16 18:09:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:09:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 115 [2025-03-16 18:09:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:09:59,862 INFO L225 Difference]: With dead ends: 220 [2025-03-16 18:09:59,862 INFO L226 Difference]: Without dead ends: 218 [2025-03-16 18:09:59,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:09:59,864 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:09:59,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 449 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:09:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-16 18:09:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2025-03-16 18:09:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 106 states have internal predecessors, (123), 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) [2025-03-16 18:09:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 296 transitions. [2025-03-16 18:09:59,907 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 296 transitions. Word has length 115 [2025-03-16 18:09:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:09:59,907 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 296 transitions. [2025-03-16 18:09:59,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2025-03-16 18:09:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 296 transitions. [2025-03-16 18:09:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-16 18:09:59,908 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:09:59,908 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] [2025-03-16 18:09:59,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:00,108 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 [2025-03-16 18:10:00,108 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:00,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1034672847, now seen corresponding path program 5 times [2025-03-16 18:10:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511937399] [2025-03-16 18:10:00,109 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:00,113 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 118 statements into 10 equivalence classes. [2025-03-16 18:10:00,135 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 18:10:00,135 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 18:10:00,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392319114] [2025-03-16 18:10:00,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:00,139 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) [2025-03-16 18:10:00,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 18:10:00,165 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 118 statements into 10 equivalence classes. [2025-03-16 18:10:00,196 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 18:10:00,196 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 18:10:00,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:00,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 18:10:00,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 76 proven. 60 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2025-03-16 18:10:01,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:01,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511937399] [2025-03-16 18:10:01,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392319114] [2025-03-16 18:10:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392319114] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:01,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:01,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-16 18:10:01,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383852547] [2025-03-16 18:10:01,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:01,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:10:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:01,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:10:01,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-03-16 18:10:01,201 INFO L87 Difference]: Start difference. First operand 215 states and 296 transitions. Second operand has 15 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2025-03-16 18:10:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:01,815 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2025-03-16 18:10:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:10:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 118 [2025-03-16 18:10:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:01,816 INFO L225 Difference]: With dead ends: 244 [2025-03-16 18:10:01,816 INFO L226 Difference]: Without dead ends: 242 [2025-03-16 18:10:01,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:10:01,817 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:01,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 408 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 18:10:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2025-03-16 18:10:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2025-03-16 18:10:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 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) [2025-03-16 18:10:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 304 transitions. [2025-03-16 18:10:01,862 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 304 transitions. Word has length 118 [2025-03-16 18:10:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:01,862 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 304 transitions. [2025-03-16 18:10:01,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2025-03-16 18:10:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 304 transitions. [2025-03-16 18:10:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-16 18:10:01,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:01,863 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] [2025-03-16 18:10:01,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:02,064 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 [2025-03-16 18:10:02,065 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:02,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1071708668, now seen corresponding path program 6 times [2025-03-16 18:10:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:02,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609419006] [2025-03-16 18:10:02,065 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:10:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:02,070 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 120 statements into 10 equivalence classes. [2025-03-16 18:10:02,104 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 120 of 120 statements. [2025-03-16 18:10:02,104 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 18:10:02,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:02,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409579384] [2025-03-16 18:10:02,105 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:10:02,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:02,107 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) [2025-03-16 18:10:02,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 18:10:02,134 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 120 statements into 10 equivalence classes. [2025-03-16 18:10:02,177 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 61 of 120 statements. [2025-03-16 18:10:02,178 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 18:10:02,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:02,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 18:10:02,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 103 proven. 19 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2025-03-16 18:10:02,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:02,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:02,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609419006] [2025-03-16 18:10:02,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:02,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409579384] [2025-03-16 18:10:02,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409579384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:02,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:02,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2025-03-16 18:10:02,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979324002] [2025-03-16 18:10:02,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:02,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:10:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:02,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:10:02,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:10:02,744 INFO L87 Difference]: Start difference. First operand 220 states and 304 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2025-03-16 18:10:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:03,195 INFO L93 Difference]: Finished difference Result 231 states and 313 transitions. [2025-03-16 18:10:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:10:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 120 [2025-03-16 18:10:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:03,196 INFO L225 Difference]: With dead ends: 231 [2025-03-16 18:10:03,197 INFO L226 Difference]: Without dead ends: 229 [2025-03-16 18:10:03,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2025-03-16 18:10:03,197 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:03,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 197 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:10:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-03-16 18:10:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 212. [2025-03-16 18:10:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 110 states have internal predecessors, (123), 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) [2025-03-16 18:10:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 284 transitions. [2025-03-16 18:10:03,240 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 284 transitions. Word has length 120 [2025-03-16 18:10:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:03,240 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 284 transitions. [2025-03-16 18:10:03,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2025-03-16 18:10:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 284 transitions. [2025-03-16 18:10:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2025-03-16 18:10:03,241 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:03,241 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] [2025-03-16 18:10:03,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 18:10:03,442 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 [2025-03-16 18:10:03,442 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:03,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash -41902702, now seen corresponding path program 2 times [2025-03-16 18:10:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034617830] [2025-03-16 18:10:03,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:03,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 126 statements into 2 equivalence classes. [2025-03-16 18:10:03,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 126 of 126 statements. [2025-03-16 18:10:03,461 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:03,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:03,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063543140] [2025-03-16 18:10:03,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:03,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:03,469 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) [2025-03-16 18:10:03,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 18:10:03,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 126 statements into 2 equivalence classes. [2025-03-16 18:10:03,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 126 of 126 statements. [2025-03-16 18:10:03,525 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:03,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:03,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-16 18:10:03,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2025-03-16 18:10:04,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:05,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:05,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034617830] [2025-03-16 18:10:05,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:05,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063543140] [2025-03-16 18:10:05,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063543140] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:05,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:05,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-03-16 18:10:05,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770540038] [2025-03-16 18:10:05,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:05,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 18:10:05,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:05,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 18:10:05,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:10:05,013 INFO L87 Difference]: Start difference. First operand 212 states and 284 transitions. Second operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2025-03-16 18:10:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:05,526 INFO L93 Difference]: Finished difference Result 252 states and 341 transitions. [2025-03-16 18:10:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 18:10:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 126 [2025-03-16 18:10:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:05,528 INFO L225 Difference]: With dead ends: 252 [2025-03-16 18:10:05,528 INFO L226 Difference]: Without dead ends: 249 [2025-03-16 18:10:05,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 18:10:05,529 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:05,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 519 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:10:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2025-03-16 18:10:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 221. [2025-03-16 18:10:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 114 states have internal predecessors, (128), 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) [2025-03-16 18:10:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 297 transitions. [2025-03-16 18:10:05,578 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 297 transitions. Word has length 126 [2025-03-16 18:10:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:05,578 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 297 transitions. [2025-03-16 18:10:05,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2025-03-16 18:10:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 297 transitions. [2025-03-16 18:10:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2025-03-16 18:10:05,579 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:05,579 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] [2025-03-16 18:10:05,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:05,780 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 [2025-03-16 18:10:05,780 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:05,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1808398238, now seen corresponding path program 7 times [2025-03-16 18:10:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681312405] [2025-03-16 18:10:05,781 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:10:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:05,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 136 statements into 1 equivalence classes. [2025-03-16 18:10:05,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 136 of 136 statements. [2025-03-16 18:10:05,799 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:05,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:05,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048170922] [2025-03-16 18:10:05,805 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:10:05,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:05,808 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) [2025-03-16 18:10:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 18:10:05,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 136 statements into 1 equivalence classes. [2025-03-16 18:10:05,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 136 of 136 statements. [2025-03-16 18:10:05,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:10:05,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:05,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-16 18:10:05,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 83 proven. 65 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2025-03-16 18:10:06,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 84 proven. 49 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2025-03-16 18:10:07,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:07,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681312405] [2025-03-16 18:10:07,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048170922] [2025-03-16 18:10:07,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048170922] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:07,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:10:07,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2025-03-16 18:10:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449622044] [2025-03-16 18:10:07,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:07,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-16 18:10:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:07,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-16 18:10:07,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2025-03-16 18:10:07,177 INFO L87 Difference]: Start difference. First operand 221 states and 297 transitions. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 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) [2025-03-16 18:10:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:08,746 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2025-03-16 18:10:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 18:10:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 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 136 [2025-03-16 18:10:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:08,748 INFO L225 Difference]: With dead ends: 281 [2025-03-16 18:10:08,748 INFO L226 Difference]: Without dead ends: 279 [2025-03-16 18:10:08,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=499, Invalid=1951, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 18:10:08,749 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:08,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 514 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 18:10:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-03-16 18:10:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 241. [2025-03-16 18:10:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 122 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) [2025-03-16 18:10:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 327 transitions. [2025-03-16 18:10:08,819 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 327 transitions. Word has length 136 [2025-03-16 18:10:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:08,819 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 327 transitions. [2025-03-16 18:10:08,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 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) [2025-03-16 18:10:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 327 transitions. [2025-03-16 18:10:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2025-03-16 18:10:08,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:08,820 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] [2025-03-16 18:10:08,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 18:10:09,021 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 [2025-03-16 18:10:09,021 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:09,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1783314214, now seen corresponding path program 3 times [2025-03-16 18:10:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:09,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735242160] [2025-03-16 18:10:09,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:10:09,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:09,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 15 equivalence classes. [2025-03-16 18:10:09,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 145 of 145 statements. [2025-03-16 18:10:09,055 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-16 18:10:09,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:09,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052887943] [2025-03-16 18:10:09,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:10:09,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:09,057 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) [2025-03-16 18:10:09,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 18:10:09,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 15 equivalence classes. [2025-03-16 18:10:09,111 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 145 statements. [2025-03-16 18:10:09,111 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:10:09,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:09,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-16 18:10:09,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 87 proven. 27 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2025-03-16 18:10:09,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735242160] [2025-03-16 18:10:09,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052887943] [2025-03-16 18:10:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052887943] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:09,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:09,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-03-16 18:10:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794775735] [2025-03-16 18:10:09,520 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:09,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 18:10:09,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:09,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 18:10:09,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2025-03-16 18:10:09,521 INFO L87 Difference]: Start difference. First operand 241 states and 327 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-16 18:10:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:09,717 INFO L93 Difference]: Finished difference Result 250 states and 335 transitions. [2025-03-16 18:10:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:10:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 145 [2025-03-16 18:10:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:09,719 INFO L225 Difference]: With dead ends: 250 [2025-03-16 18:10:09,719 INFO L226 Difference]: Without dead ends: 243 [2025-03-16 18:10:09,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-16 18:10:09,719 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:09,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 251 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:10:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-16 18:10:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 234. [2025-03-16 18:10:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 117 states have (on average 1.1538461538461537) internal successors, (135), 119 states have internal predecessors, (135), 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) [2025-03-16 18:10:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 314 transitions. [2025-03-16 18:10:09,788 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 314 transitions. Word has length 145 [2025-03-16 18:10:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:09,788 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 314 transitions. [2025-03-16 18:10:09,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-16 18:10:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 314 transitions. [2025-03-16 18:10:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-03-16 18:10:09,789 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:09,789 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] [2025-03-16 18:10:09,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 18:10:09,989 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 [2025-03-16 18:10:09,989 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:09,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash 451232901, now seen corresponding path program 4 times [2025-03-16 18:10:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28951769] [2025-03-16 18:10:09,990 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:10:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:09,994 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 147 statements into 2 equivalence classes. [2025-03-16 18:10:10,008 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 147 of 147 statements. [2025-03-16 18:10:10,008 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 18:10:10,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:10,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960096870] [2025-03-16 18:10:10,009 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:10:10,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:10,012 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) [2025-03-16 18:10:10,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 18:10:10,043 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 147 statements into 2 equivalence classes. [2025-03-16 18:10:10,074 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 141 of 147 statements. [2025-03-16 18:10:10,075 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:10:10,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:10,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-16 18:10:10,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 99 proven. 67 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2025-03-16 18:10:10,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:16,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28951769] [2025-03-16 18:10:16,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960096870] [2025-03-16 18:10:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960096870] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:16,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-16 18:10:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125499959] [2025-03-16 18:10:16,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:16,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 18:10:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:16,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 18:10:16,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=575, Unknown=1, NotChecked=0, Total=650 [2025-03-16 18:10:16,127 INFO L87 Difference]: Start difference. First operand 234 states and 314 transitions. Second operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2025-03-16 18:10:19,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:19,167 INFO L93 Difference]: Finished difference Result 268 states and 367 transitions. [2025-03-16 18:10:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 18:10:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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 147 [2025-03-16 18:10:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:19,168 INFO L225 Difference]: With dead ends: 268 [2025-03-16 18:10:19,168 INFO L226 Difference]: Without dead ends: 261 [2025-03-16 18:10:19,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=130, Invalid=991, Unknown=1, NotChecked=0, Total=1122 [2025-03-16 18:10:19,170 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:19,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 596 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2025-03-16 18:10:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-03-16 18:10:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2025-03-16 18:10:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 122 states have internal predecessors, (139), 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) [2025-03-16 18:10:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 326 transitions. [2025-03-16 18:10:19,246 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 326 transitions. Word has length 147 [2025-03-16 18:10:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:19,246 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 326 transitions. [2025-03-16 18:10:19,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 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) [2025-03-16 18:10:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 326 transitions. [2025-03-16 18:10:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2025-03-16 18:10:19,248 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:19,248 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] [2025-03-16 18:10:19,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:19,452 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 [2025-03-16 18:10:19,452 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:19,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash -375767793, now seen corresponding path program 5 times [2025-03-16 18:10:19,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:19,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269079475] [2025-03-16 18:10:19,452 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:19,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:19,457 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 147 statements into 15 equivalence classes. [2025-03-16 18:10:19,468 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 147 of 147 statements. [2025-03-16 18:10:19,468 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 18:10:19,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590532791] [2025-03-16 18:10:19,469 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:10:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:19,475 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) [2025-03-16 18:10:19,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 18:10:19,507 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 147 statements into 15 equivalence classes. [2025-03-16 18:10:37,972 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 147 of 147 statements. [2025-03-16 18:10:37,972 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-16 18:10:37,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:37,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 18:10:37,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 80 proven. 137 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2025-03-16 18:10:39,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:40,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:40,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269079475] [2025-03-16 18:10:40,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:40,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590532791] [2025-03-16 18:10:40,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590532791] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:40,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:40,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-16 18:10:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602394550] [2025-03-16 18:10:40,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:40,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:10:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:40,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:10:40,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2025-03-16 18:10:40,093 INFO L87 Difference]: Start difference. First operand 241 states and 326 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-16 18:10:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:41,326 INFO L93 Difference]: Finished difference Result 281 states and 383 transitions. [2025-03-16 18:10:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:10:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 147 [2025-03-16 18:10:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:41,327 INFO L225 Difference]: With dead ends: 281 [2025-03-16 18:10:41,327 INFO L226 Difference]: Without dead ends: 274 [2025-03-16 18:10:41,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 18:10:41,328 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:41,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 203 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 18:10:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-03-16 18:10:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2025-03-16 18:10:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 129 states have internal predecessors, (147), 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) [2025-03-16 18:10:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 342 transitions. [2025-03-16 18:10:41,417 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 342 transitions. Word has length 147 [2025-03-16 18:10:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:41,417 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 342 transitions. [2025-03-16 18:10:41,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-16 18:10:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 342 transitions. [2025-03-16 18:10:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2025-03-16 18:10:41,418 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:41,418 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] [2025-03-16 18:10:41,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:41,619 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 [2025-03-16 18:10:41,619 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:41,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash 942137823, now seen corresponding path program 8 times [2025-03-16 18:10:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475674380] [2025-03-16 18:10:41,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:41,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 157 statements into 2 equivalence classes. [2025-03-16 18:10:41,637 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 157 of 157 statements. [2025-03-16 18:10:41,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:41,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068682429] [2025-03-16 18:10:41,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:10:41,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:41,643 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) [2025-03-16 18:10:41,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 18:10:41,680 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 157 statements into 2 equivalence classes. [2025-03-16 18:10:41,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 157 of 157 statements. [2025-03-16 18:10:41,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:10:41,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:41,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-03-16 18:10:41,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 103 proven. 88 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2025-03-16 18:10:42,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 101 proven. 75 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2025-03-16 18:10:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475674380] [2025-03-16 18:10:43,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068682429] [2025-03-16 18:10:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068682429] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:10:43,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:10:43,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2025-03-16 18:10:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833918499] [2025-03-16 18:10:43,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:43,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 18:10:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:43,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 18:10:43,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2025-03-16 18:10:43,340 INFO L87 Difference]: Start difference. First operand 254 states and 342 transitions. Second operand has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) [2025-03-16 18:10:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:10:47,972 INFO L93 Difference]: Finished difference Result 345 states and 497 transitions. [2025-03-16 18:10:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-16 18:10:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) Word has length 157 [2025-03-16 18:10:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:10:47,975 INFO L225 Difference]: With dead ends: 345 [2025-03-16 18:10:47,975 INFO L226 Difference]: Without dead ends: 343 [2025-03-16 18:10:47,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 18:10:47,976 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 93 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:10:47,976 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 736 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-03-16 18:10:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2025-03-16 18:10:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 286. [2025-03-16 18:10:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 136 states have internal predecessors, (160), 122 states have call successors, (122), 29 states have call predecessors, (122), 29 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2025-03-16 18:10:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 403 transitions. [2025-03-16 18:10:48,115 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 403 transitions. Word has length 157 [2025-03-16 18:10:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:10:48,116 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 403 transitions. [2025-03-16 18:10:48,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) [2025-03-16 18:10:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 403 transitions. [2025-03-16 18:10:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2025-03-16 18:10:48,117 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:10:48,117 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] [2025-03-16 18:10:48,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-16 18:10:48,317 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 [2025-03-16 18:10:48,317 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:10:48,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:10:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1811186546, now seen corresponding path program 6 times [2025-03-16 18:10:48,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:10:48,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895024830] [2025-03-16 18:10:48,318 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:10:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:10:48,322 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 168 statements into 16 equivalence classes. [2025-03-16 18:10:48,341 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 18:10:48,341 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-16 18:10:48,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:10:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715952748] [2025-03-16 18:10:48,342 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:10:48,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:10:48,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:10:48,345 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) [2025-03-16 18:10:48,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 18:10:48,376 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 168 statements into 16 equivalence classes. [2025-03-16 18:10:48,413 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 85 of 168 statements. [2025-03-16 18:10:48,413 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 18:10:48,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:10:48,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-16 18:10:48,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:10:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 169 proven. 56 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2025-03-16 18:10:51,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:10:52,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:10:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895024830] [2025-03-16 18:10:52,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:10:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715952748] [2025-03-16 18:10:52,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715952748] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:10:52,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:10:52,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-16 18:10:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859938112] [2025-03-16 18:10:52,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:10:52,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:10:52,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:10:52,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:10:52,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-16 18:10:52,137 INFO L87 Difference]: Start difference. First operand 286 states and 403 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2025-03-16 18:10:56,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:02,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:04,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:07,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:09,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:12,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-03-16 18:11:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:12,869 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2025-03-16 18:11:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:11:12,870 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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 168 [2025-03-16 18:11:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:12,872 INFO L225 Difference]: With dead ends: 341 [2025-03-16 18:11:12,872 INFO L226 Difference]: Without dead ends: 334 [2025-03-16 18:11:12,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2025-03-16 18:11:12,872 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:12,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 416 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 449 Invalid, 1 Unknown, 0 Unchecked, 20.0s Time] [2025-03-16 18:11:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2025-03-16 18:11:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 272. [2025-03-16 18:11:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 131 states have (on average 1.1755725190839694) internal successors, (154), 134 states have internal predecessors, (154), 111 states have call successors, (111), 29 states have call predecessors, (111), 29 states have return successors, (110), 108 states have call predecessors, (110), 110 states have call successors, (110) [2025-03-16 18:11:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 375 transitions. [2025-03-16 18:11:13,013 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 375 transitions. Word has length 168 [2025-03-16 18:11:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:13,013 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 375 transitions. [2025-03-16 18:11:13,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 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) [2025-03-16 18:11:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 375 transitions. [2025-03-16 18:11:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2025-03-16 18:11:13,014 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:13,014 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] [2025-03-16 18:11:13,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:13,214 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 [2025-03-16 18:11:13,215 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:13,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1499388632, now seen corresponding path program 7 times [2025-03-16 18:11:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:13,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123596767] [2025-03-16 18:11:13,215 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:11:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:13,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 168 statements into 1 equivalence classes. [2025-03-16 18:11:13,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 18:11:13,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:13,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006201467] [2025-03-16 18:11:13,236 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:11:13,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:13,241 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) [2025-03-16 18:11:13,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 18:11:13,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 168 statements into 1 equivalence classes. [2025-03-16 18:11:13,313 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 18:11:13,313 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:13,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:13,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 18:11:13,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2025-03-16 18:11:14,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123596767] [2025-03-16 18:11:15,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:15,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006201467] [2025-03-16 18:11:15,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006201467] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:15,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:11:15,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-16 18:11:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464311857] [2025-03-16 18:11:15,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:15,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-16 18:11:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:15,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-16 18:11:15,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 18:11:15,360 INFO L87 Difference]: Start difference. First operand 272 states and 375 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 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) [2025-03-16 18:11:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:17,285 INFO L93 Difference]: Finished difference Result 321 states and 452 transitions. [2025-03-16 18:11:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 18:11:17,286 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), 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 168 [2025-03-16 18:11:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:17,288 INFO L225 Difference]: With dead ends: 321 [2025-03-16 18:11:17,288 INFO L226 Difference]: Without dead ends: 314 [2025-03-16 18:11:17,288 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 18:11:17,289 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:17,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 530 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 18:11:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2025-03-16 18:11:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 281. [2025-03-16 18:11:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 138 states have internal predecessors, (159), 115 states have call successors, (115), 30 states have call predecessors, (115), 30 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2025-03-16 18:11:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 388 transitions. [2025-03-16 18:11:17,436 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 388 transitions. Word has length 168 [2025-03-16 18:11:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:17,437 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 388 transitions. [2025-03-16 18:11:17,437 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), 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) [2025-03-16 18:11:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 388 transitions. [2025-03-16 18:11:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2025-03-16 18:11:17,438 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:17,438 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] [2025-03-16 18:11:17,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:17,638 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 [2025-03-16 18:11:17,639 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:17,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1968577970, now seen corresponding path program 8 times [2025-03-16 18:11:17,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:17,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18254282] [2025-03-16 18:11:17,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:11:17,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:17,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 168 statements into 2 equivalence classes. [2025-03-16 18:11:17,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 18:11:17,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:11:17,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609642654] [2025-03-16 18:11:17,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:11:17,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:17,656 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) [2025-03-16 18:11:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 18:11:17,691 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 168 statements into 2 equivalence classes. [2025-03-16 18:11:17,731 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 168 of 168 statements. [2025-03-16 18:11:17,731 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:11:17,731 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:17,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 18:11:17,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2025-03-16 18:11:19,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:21,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18254282] [2025-03-16 18:11:21,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:21,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609642654] [2025-03-16 18:11:21,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609642654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:21,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:11:21,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-16 18:11:21,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670357492] [2025-03-16 18:11:21,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:21,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 18:11:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:21,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 18:11:21,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:11:21,664 INFO L87 Difference]: Start difference. First operand 281 states and 388 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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)